JP2004262582A - Elevator brake control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize an elevator brake control device in order to be sufficiently arranged on a control panel of a machine-roomless elevator system. <P>SOLUTION: In this elevator brake control device, both of a first contact 3 and a second contact 4 are turned on during a forcible exitation period, and a brake voltage half-wave rectificated by a block diode 2 and applied to a brake coil 5 is a high voltage level. Thus, in a holding period, the second contact 4 is turned off and voltage drop by a partial pressure resistance 8 occurs, and the brake voltage applied to the brake coil 5 can be low voltage level. The brake voltages are lower compared to the conventional technique, an alternating current load shutdown contact having small capacity can be used for the contacts 3 and 4, not a direct current load shutdown contact. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an elevator brake control device.
[0002]
[Prior art]
The brake operation of the elevator is released only when the car is moving, and the brake is always applied at other times. For example, the movement of an elevator car is basically performed by driving a hoist motor. However, when the car arrives at the destination floor, a brake is applied. The shift of the stop position is prevented. Further, the brake is automatically applied even when a power failure occurs, so that the car does not fall even if the power supply to the elevator control circuit is stopped.
[0003]
The brakes used in elevators are called electromagnetic brakes.In the state where the brake coil is not energized, the brake shoe presses against the rotor of the hoist motor by the pressing force of the spring member so that its rotation is restricted. Has become. However, when the brake coil is energized, the brake shoe is separated from the rotor by the generated electromagnetic force, so that the brake operation is released and the car can be moved. FIGS. 22A and 22B are explanatory diagrams of a conventional device for controlling such an elevator brake. FIG. 22A is a circuit configuration diagram, and FIG. 22B is an operation waveform diagram. In addition, the contents of general brake control of an elevator are disclosed, for example, in Patent Document 1 or Patent Document 2.
[0004]
In FIG. 22A, an AC voltage from a three-phase AC power supply 101, which is an AC power supply unit, is rectified by a three-phase rectifier circuit 102. The three-phase rectifier circuit 102 is formed by bridge-connecting diodes D1, D3, and D5 forming an upper arm and diodes D2, D4, and D6 forming a lower arm. The R phase of the three-phase AC power supply 101 is connected to the common connection point of the diodes D1 and D2, the S phase is connected to the common connection point of the diodes D3 and D4, and the T phase is connected to the common connection point of the diodes D5 and D6. ing.
[0005]
Further, the cathode-side common connection point of the diodes D1, D3, and D5 is connected to one end of a brake coil 105 via a first contact 103 and a second contact 104 connected in series. Is connected to the anode-side common connection point of diodes D2, D4 and D6. Further, a voltage dividing resistor 106 is connected to the second contact 104 in parallel.
[0006]
Next, the brake control operation of the device shown in FIG. Generally, in a large-capacity or medium-capacity elevator, the energy required to operate the electromagnetic brake against the pressing force of the spring member first becomes large. Therefore, at the start of the initial excitation of the brake coil, a high voltage is applied to secure sufficient energy for releasing the brake, and once the brake is released, it is necessary to maintain the brake released state. Control is performed such that a sufficiently low voltage is applied to the brake coil. In this specification, the initial period in which a high voltage is applied to the brake coil (for example, a period of about 0.5 seconds) is referred to as a "forced excitation period", and after that, the brake coil is switched to a low voltage and the brake coil is switched to a low voltage. The period during which the open state is maintained is referred to as a “holding period”.
[0007]
FIG. 22B is a waveform diagram showing the on / off state of the contacts 103 and 104 and the change state of the brake voltage and the brake current for the brake coil 105 during such a forced excitation period and the holding period. That is, first, during the forced excitation period, both the first contact 103 and the second contact 104 are in the ON state. In this state, full-wave rectification is performed by the three-phase rectifier circuit 102 and applied to the brake coil 105. Brake voltage is at a high voltage level. Therefore, the brake current flowing through the brake coil 105 due to the application of the voltage also becomes a high current level.
[0008]
Next, when the holding period starts, the second contact 104 is turned off and a voltage drop is caused by the voltage dividing resistor 106, so that the brake voltage applied to the brake coil 105 becomes a low voltage level. The brake current flowing through the brake coil 105 also has a low current level.
[0009]
[Patent Document 1]
JP-A-3-143888
[Patent Document 2]
JP 2001-114487 A
[0010]
[Problems to be solved by the invention]
By the way, the first contact 103 and the second contact 104 are DC load breaking contacts, and have considerably larger current capacity and larger dimensions than AC load breaking contacts. Further, with the use of these contacts having a large capacity, the voltage dividing resistor 106 also has a large current capacity and a large size. As described above, the use of the DC load breaking contact instead of the AC load breaking contact as the contact member for turning on / off the power supply to the brake coil increases the voltage applied to the brake coil during the forced excitation period and generates a spark when the contact is turned on / off. Therefore, it is more appropriate to use a DC load breaking contact having a higher resistance to such a spark damage than an AC load breaking contact.
[0011]
The three-phase rectifier circuit 102, the first contact 103, the second contact 104, the voltage dividing resistor 106 and the like in FIG. 22 are installed in an elevator machine room located above the elevator hoistway (usually installed on the roof of a building or the like). Has been arranged). Since a certain amount of space is secured in the elevator machine room, there is no particular problem even if the contacts 103 and 104 and the voltage dividing resistor 106 have large dimensions.
[0012]
On the other hand, recently, there has been a strong demand for space saving in elevator systems, and so-called machine roomless elevator systems that do not require installation of an elevator machine room are becoming mainstream even for large and medium capacity elevators. However, when the configuration as shown in FIG. 22 is applied to such a machine roomless elevator system, the components such as the above-mentioned contacts 103 and 104 and the voltage dividing resistor 106 are provided on a control panel installed at a landing on a predetermined floor. However, the space in the control panel is very small compared to the space in the elevator machine room. For this reason, the system has disadvantages such as the inability to use a contact member or a voltage dividing resistor having a sufficient capacity, or the necessity of increasing the space in the control panel, thereby impairing the design effect.
[0013]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an elevator brake control device including a member that is small enough to be disposed in a control panel of a machine roomless elevator system. The purpose is.
[0014]
[Means for Solving the Problems]
As means for solving the above problem, the invention according to claim 1 is characterized in that when performing a brake release operation by rectifying an AC voltage from an AC power supply unit and applying the rectified voltage to a brake coil via a contact member. In an elevator brake control device in which the applied voltage during the forced excitation period is set to a high voltage and the applied voltage during the subsequent holding period is set to a low voltage by the on / off operation of the contact member, a single-phase AC power supply as the AC power supply unit A series connection body composed of a block diode for performing the rectification and first and second contacts as the contact member, a voltage dividing resistor connected in parallel to the second contact, and connected in parallel to the brake coil. A freewheel diode, and one end of the brake coil is connected to the single-phase AC power supply via the series connection body, and the other end is directly connected to the single-phase AC power supply. Connected to one end and the other end, respectively, so that both the first and second contacts are turned on during the forcible excitation period, and only the first contact is turned on during the holding period. , Is characterized.
[0015]
According to the second aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. In the elevator brake control device, the applied voltage during the subsequent holding period is set to a low voltage by the on / off operation of the contact member, a high-voltage single-phase AC power supply and a low-voltage A single-phase AC power supply, a first series connection body including a first contact as the contact member and a first block diode for performing the rectification, and a second contact as the contact member and a second contact for performing the rectification. A second series-connected body composed of two block diodes; and a freewheel diode connected in parallel to the brake coil, wherein the brake coil One end is connected to one end of the high-voltage single-phase AC power supply and the low-voltage single-phase AC power supply via the first and second series-connected bodies, respectively, and the other end is connected to the high-voltage single-phase AC power supply. To the common connection point of the single-phase AC power supply for low voltage and the single-phase AC power supply for low voltage, and only the first contact is turned on during the forced excitation period, and only the second contact is turned on during the holding period. Is turned on.
[0016]
According to a third aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. And a single-phase AC power supply as the AC power supply unit, and diodes D1 and D3 forming an upper arm. And a diode D2 and D4 forming a lower arm are bridge-connected, and a single-phase rectifier circuit for performing the rectification is provided between one end of the single-phase AC power supply and a common connection point of the diodes D1 and D2. A first contact as the contact member connected thereto, connected between the other end of the single-phase AC power supply and a common connection point of the diodes D3 and D4, A second contact as a contact member, an anode is connected to an anode-side common connection point of the diodes D2 and D4, and a cathode is connected between the other end of the single-phase AC power supply and the second contact. And a block diode for performing the rectification when the second contact is in an off state, and connecting one end of the brake coil to a cathode-side common connection point of the diodes D1 and D3. An end is connected to an anode-side common connection point of the diodes D2 and D4, and both the first and second contacts are turned on during the forcible excitation period, and only the first contact is provided during the holding period. Is turned on.
[0017]
According to a fourth aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. In the elevator brake control device, the first and second units are connected in series as the AC power supply unit and in opposite phases to each other as an AC power supply. A first series connection body comprising a phase AC power supply, a first contact as the contact member, and a first block diode for performing the rectification, a second contact as the contact member, and a second for performing the rectification And a freewheel diode connected in parallel to the brake coil. One end is connected to one end of the first and second single-phase AC power supplies via the first and second series-connected bodies, respectively, and the other end is connected to the first and second single-phase AC power supplies. Connected to a common connection point of an AC power supply, and both the first and second contacts are turned on during the forced excitation period, and only the first contact is turned on during the holding period. Features.
[0018]
According to a fifth aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. And a single-phase AC power supply as the AC power supply unit, and diodes D1 and D3 forming an upper arm. And a diode D2 and D4 forming a lower arm are bridge-connected, and a single-phase rectifier circuit for performing the rectification is provided between one end of the single-phase AC power supply and a common connection point of the diodes D1 and D2. A first contact as the contact member connected thereto, connected between the other end of the single-phase AC power supply and a common connection point of the diodes D3 and D4, A second contact as a contact member; and a voltage-dividing resistor connected in parallel to the second contact. One end of the brake coil is connected to a cathode-side common connection point of the diodes D1 and D3. At the same time, the other end is connected to an anode-side common connection point of the diodes D2 and D4, both the first and second contacts are turned on during the forced excitation period, and the first contact is maintained during the holding period. Are turned on only.
[0019]
According to a sixth aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. In the elevator brake control device, the applied voltage during the subsequent holding period is set to a low voltage by the on / off operation of the contact member, a high-voltage single-phase AC power supply and a low-voltage A single-phase AC power supply, diodes D1 and D3 forming an upper arm and diodes D2 and D4 forming a lower arm are bridge-connected, and a single-phase rectifier circuit for performing the rectification; A first contact as the contact member, connected between one end of the power supply and a common connection point of the diodes D1 and D2, and the low-voltage single-phase AC power supply A second contact as the contact member connected between one end and a common connection point of the diodes D1 and D2, wherein one end of the brake coil is common to the cathode of the diodes D1 and D3. The other end is connected to the anode-side common connection point of the diodes D2 and D4, and the common connection point of the diodes D3 and D4 is further connected to the high-voltage single-phase AC power supply and the low-voltage single Connected to a common connection point of a phase AC power supply, wherein only the first contact is turned on during the forced excitation period, and only the second contact is turned on during the holding period. .
[0020]
According to a seventh aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. In the elevator brake control device, the first and second units are connected in series as the AC power supply unit and in opposite phases to each other as an AC power supply. A phase alternating-current power supply, a first series connection composed of first and second contacts on the order phase side as the contact member, and a first block diode for performing the rectification; A second series connection composed of a first and a second contact and a second block diode for performing the rectification, and a second connection in parallel with the second contact on the order phase side and the opposite phase side, respectively. And a voltage dividing resistor connected on the order phase side and the opposite phase side, and one end of the brake coil is connected to the first and second single-phases via the first and second series-connected bodies, respectively. An AC power supply is connected to one end of the AC power supply, and the other end is connected to a common connection point of the first and second single-phase AC power supplies. And all the second contacts are turned on, and only the first contacts on the order phase side and the opposite phase side are turned on during the holding period.
[0021]
The invention according to claim 8 rectifies the AC voltage from the AC power supply section and applies the rectified voltage to the brake coil through the contact member to perform the brake release operation, thereby increasing the applied voltage during the forced excitation period. Voltage, and the applied voltage during the subsequent holding period is reduced to a low voltage by the on / off operation of the contact member. In the elevator brake control device, each of the R phase, the S phase, the T phase, and the neutral point, A three-phase AC power supply as a power supply unit, R-phase first and second contacts as the contact member, and an R-phase series connection body including an R-phase block diode for performing the rectification, and the contact member First and second contacts for S-phase, and a series connection for S-phase comprising a block diode for S-phase for performing the rectification; first and second contacts for T-phase as the contact member; Adjustment And a T-phase series connected body composed of a T-phase block diode, and R-phase, S-phase, and T-phase connected in parallel to the second contacts for the R-phase, S-phase, and T-phase. For each of the voltage-dividing resistors, the cathodes of the R-phase, S-phase, and T-phase block diodes are commonly connected, and one end of the brake coil is connected to this common connection point. The other end is connected to the neutral point of the three-phase AC power source, and during the forced excitation period, all of the first and second contacts for the R phase, S phase, and T phase are turned on, During the holding period, only the first contacts for the R phase, the S phase, and the T phase are turned on.
[0022]
According to the ninth aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. Voltage, and the applied voltage during the subsequent holding period is reduced to a low voltage by the on / off operation of the contact member. In the elevator brake control device, each of the R phase, the S phase, the T phase, and the neutral point, A three-phase AC power supply as a power supply unit, an R-phase first contact as the contact member, and an R-phase series connection body including an R-phase block diode for rectification, and an S-phase as the contact member S-phase series connection body comprising a first contact for use, an S-phase block diode for performing the rectification, a second contact for T-phase as the contact member, and a T-phase block diode for performing the rectification. And a free-wheel diode connected in parallel to the brake coil, the cathode of each of the R-phase, S-phase, and T-phase block diodes being connected in common, One end of the brake coil is connected to this common connection point, and the other end is connected to the neutral point of the three-phase AC power supply. And the T-phase second contacts are all turned on, and only the T-phase second contacts are turned on during the holding period.
[0023]
According to a tenth aspect of the present invention, in the elevator brake control device according to the ninth aspect, only the second contact for the T-phase is turned on during the holding period, but the R-phase is maintained during the holding period. Only the first contacts for the phase and the S phase are turned on.
[0024]
According to an eleventh aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. Voltage, and the applied voltage during the subsequent holding period is reduced to a low voltage by the on / off operation of the contact member. In the elevator brake control device, each of the R phase, the S phase, the T phase, and the neutral point, A three-phase AC power supply as a power supply unit, an R-phase first contact as the contact member, an R-phase voltage dividing resistor, and an R-phase series connection body including an R-phase block diode for performing the rectification; A first S-phase contact as the contact member, an S-phase voltage dividing resistor, and an S-phase series connection body comprising the S-phase block diode for performing the rectification; and a T-phase as the contact member. Second A point and a T-phase voltage divider for the T-phase, and a T-phase series connected body composed of a T-phase block diode for performing the rectification, and connected in parallel to the T-phase voltage divider for the R and S phases. A third contact for the T phase that performs a b-contact operation with respect to each of the first contacts, and a freewheel diode connected in parallel to the brake coil, for the R phase, the S phase, and the T phase. The cathodes of the respective block diodes are connected in common, one end of the brake coil is connected to this common connection point, and the other end is connected to the neutral point of the three-phase AC power supply. The first contacts for the R phase and the S phase, and the second contact for the T phase are turned on, and only the second contact for the T phase is turned on during the holding period. Features.
[0025]
According to a twelfth aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. Voltage, and the applied voltage during the subsequent holding period is reduced to a low voltage by the on / off operation of the contact member. In the elevator brake control device, each of the R phase, the S phase, the T phase, and the neutral point, A three-phase AC power supply as a power supply unit, R-phase first and second contacts as the contact member, and an R-phase series connection body including an R-phase block diode for performing the rectification, and the contact member First and second contacts for S-phase, and a series connection for S-phase comprising a block diode for S-phase for performing the rectification; first and second contacts for T-phase as the contact member; A T-phase series connected body composed of a T-phase block diode for conducting current, and R-phase and S-phase voltage dividing resistors connected in parallel to the R-phase and S-phase second contacts. And a freewheel diode connected in parallel to the brake coil. The cathodes of the R-phase, S-phase, and T-phase block diodes are connected in common, and one end of the brake coil is connected in common with the cathode. And the other end is connected to the neutral point of the three-phase AC power supply. During the forced excitation period, the first and second contacts of the R, S, and T phases are connected. All are turned on, and only the first contacts for the R phase and the S phase are turned on during the holding period.
[0026]
According to a thirteenth aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. Voltage, and the applied voltage during the subsequent holding period is reduced to a low voltage by the on / off operation of the contact member. In the elevator brake control device, each of the R phase, the S phase, the T phase, and the neutral point, A three-phase AC power supply as a power supply unit, R-phase first and second contacts as the contact member, and an R-phase series connection body including an R-phase block diode for performing the rectification, and the contact member A first contact for S-phase, a series connection for S-phase comprising an S-phase block diode for performing the rectification, and a freewheel diode connected in parallel to the brake coil. The cathodes of the R-phase and S-phase block diodes are commonly connected, one end of the brake coil is connected to this common connection point, and the other end is connected to the neutral point of the three-phase AC power supply. And the T-phase load-side terminal of the three-phase AC power supply is opened, and during the forced excitation period, the first contact for the R-phase and the S-phase and the second contact for the R-phase are connected. All are turned on, and only the first contacts for the R phase and the S phase are turned on during the holding period.
[0027]
According to a fourteenth aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. Voltage, and the applied voltage during the subsequent holding period is reduced to a low voltage by the on / off operation of the contact member. In the elevator brake control device, each of the R phase, the S phase, the T phase, and the neutral point, A three-phase AC power supply as a power supply unit, R-phase first and second contacts as the contact member, and an R-phase series connection body including an R-phase block diode for performing the rectification, and the contact member And an S-phase series connection body including the S-phase first and second contacts, and the S-phase block diode for performing the rectification, and an S-phase voltage divider connected in parallel to the S-phase second contact. Resistance and before A freewheel diode connected in parallel to the brake coil, a cathode of each of the R-phase and S-phase block diodes is commonly connected, and one end of the brake coil is connected to this common connection point; The other end is connected to the neutral point of the three-phase AC power supply, and the T-phase load-side terminal of the three-phase AC power supply is opened. During the forced excitation period, the R-phase and S-phase All of the first and second contacts are turned on, and only the R-phase and S-phase first contacts are turned on during the holding period.
[0028]
According to a fifteenth aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. In an elevator brake control device for applying a voltage and applying a voltage during a holding period thereafter to a low voltage by the on / off operation of the contact member, a three-phase AC power supply and a single-phase AC power supply as the AC power supply unit and an upper arm are formed. Diodes D1, D3, and D5 and diodes D2, D4, and D6 that form a lower arm are bridge-connected, and a three-phase rectifier circuit that performs the rectification, an R-phase side of the three-phase AC power supply, and the diode D1. , D2, the R-phase first contact as the contact member, the S-phase side of the three-phase AC power supply, and the diode D3. 4, a first contact for the S-phase as the contact member, which is connected between the common connection point of the single-phase AC power supply and a common connection point of the diodes D1 and D2. And a single-phase second contact as the contact member, wherein one end of the brake coil is connected to a cathode-side common connection point of the diodes D1, D3, and D5, and the other end is connected to the other end of the brake coil. The diode D2, D4, and D6 are connected to a common connection point on the anode side, and the T-phase side of the three-phase AC power supply and the other end of the single-phase AC power supply are connected to a common connection point of the diodes D5 and D6. During the forced excitation period, only the R-phase and S-phase first contacts are turned on, and during the holding period, only the single-phase second contact is turned on. I do.
[0029]
The invention according to claim 16 is the elevator brake control device according to claim 15, wherein a single-phase voltage dividing resistor is interposed between the single-phase second contact and the diodes D1 and D2. It is characterized by the following.
[0030]
According to a seventeenth aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. In an elevator brake control device for applying a voltage and applying a voltage during a holding period thereafter to a low voltage by the on / off operation of the contact member, a three-phase AC power supply and a single-phase AC power supply as the AC power supply unit and an upper arm are formed. And a diode D1, D3, D5 and a diode D2, D4, D6 forming a lower arm are connected in a bridge, and are formed by a three-phase rectifier circuit for performing the rectification and diodes D7, D8 connected in series. A diode series-connected body connected in parallel to a three-phase rectifier circuit, and a common connection point between the R-phase side of the three-phase AC power supply and the diodes D1 and D2 A first contact for the R phase as the contact member, connected between the S-phase side of the three-phase AC power supply and a common connection point of the diodes D3 and D4. A first contact for S-phase as a member, and a second contact for single-phase as the contact member connected between one end of the single-phase AC power supply and a common connection point of the diodes D7 and D8. And one end of the brake coil is connected to a cathode-side common connection point of the diodes D1, D3, D5, and D7, and the other end is connected to an anode-side common connection of the diodes D2, D4, D6, and D8. And a T-phase side of the three-phase AC power supply and the other end of the single-phase AC power supply are connected to a common connection point of the diodes D5 and D6, and at least the R-phase during the forced excitation period. Contacts for power and S phase are turned on Deliberately, it said in the holding period and only the on-state second contact for the single-phase, it is characterized.
[0031]
The invention according to claim 18 is the elevator brake control device according to claim 17, wherein a single-phase voltage dividing resistor is interposed between the single-phase second contact and the diodes D7 and D8. It is characterized by the following.
[0032]
In the invention according to claim 19, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. A three-phase AC power supply as the AC power supply, and diodes D1 and D3 forming an upper arm. , D5 and diodes D2, D4, D6 forming the lower arm are bridge-connected, and a three-phase rectifier circuit for performing the rectification, and a common connection between the R-phase side of the three-phase AC power supply and the diodes D1, D2. A first contact for the R phase as the contact member, a common connection point between the T-phase side of the three-phase AC power supply and the diodes D5 and D6 A second contact for the T phase as the contact member, which is connected between the one end of the brake coil and a cathode-side common connection point of the diodes D1, D3, and D5. An end is connected to an anode-side common connection point of the diodes D2, D4, and D6, and an S-phase side of the three-phase AC power supply is connected to a common connection point of the diodes D3 and D4. Turns on both the R-phase first contact and the T-phase second contact, and turns on only the R-phase first contact during the holding period. .
[0033]
According to a twentieth aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. A three-phase AC power supply as the AC power supply, and diodes D1 and D3 forming an upper arm. , D5 and diodes D2, D4, D6 forming the lower arm are bridge-connected, and a three-phase rectifier circuit for performing the rectification, and a common connection between the R-phase side of the three-phase AC power supply and the diodes D1, D2. A second contact for the R phase as the contact member, a common connection point between the S phase side of the three-phase AC power supply and the diodes D3 and D4 And a second contact for the S phase as the contact member, connected between the T-phase side of the three-phase AC power supply and a common connection point of the diodes D5 and D6. A T-phase first contact as a member; and an R-phase voltage dividing resistor connected in parallel to the R-phase second contact, and one end of the brake coil is connected to the diodes D1, D3, D5. And the other end is connected to the anode-side common connection point of the diodes D2, D4 and D6, and the S-phase side of the three-phase AC power supply is connected to the diodes D3 and D4. Connected to a common connection point, and during the forcible excitation period, all of the R-phase and S-phase second contacts and the T-phase first contact are turned on. During the holding period, the T-phase It is characterized in that only the first contact is turned on.
[0034]
According to a twenty-first aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. A three-phase AC power supply as the AC power supply, and diodes D1 and D3 forming an upper arm. , D5 and diodes D2, D4, D6 forming a lower arm are connected in a bridge, and a three-phase rectifier circuit for performing the rectification is provided. One end is connected to the R-phase side of the three-phase AC power source and the other end is provided. Is connected to a common connection point of the diodes D1 and D2, and the R-phase first and second contacts as the contact members are connected in series to form an R-phase series connection. And one end is connected to the S-phase side of the three-phase AC power source, and the other end is connected to a common connection point of the diodes D3 and D4, and the first and second contacts for the S-phase as the contact members are provided. An S-phase series connected body connected in series, and one end connected to the T-phase side of the three-phase AC power supply and the other end connected to a common connection point of the diodes D5 and D6, A series connection body for a T phase in which the first and second contacts for the T phase are connected in series, and a series connection for the R phase connected in parallel to the respective second contacts for the R phase, the S phase, and the T phase. , S-phase, and T-phase voltage dividing resistors, one end of the brake coil is connected to a cathode-side common connection point of the diodes D1, D3, and D5, and the other end is connected to the diode D2. , D4, D6 to the common connection point on the anode side, During the period, all of the first and second contacts for the R phase, the S phase, and the T phase are turned on, and during the holding period, the first contacts for the R phase, the S phase, and the T phase are turned on. Are turned on only.
[0035]
In the invention according to claim 22, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. A high-voltage three-phase AC power source and a low-voltage three-phase AC power source as the AC power supply unit. And a diode D1, D3, D5 forming an upper arm and diodes D2, D4, D6 forming a lower arm are bridge-connected, and a three-phase rectifier circuit for performing the rectification; A first contact for the high-voltage side R-phase as the contact member, which is connected between the R-phase side of the power supply and a common connection point of the diodes D1 and D2; A first contact for the high-voltage side S-phase as the contact member, which is connected between the S-phase side of the AC power supply and a common connection point of the diodes D3 and D4; A second contact for the low-voltage R-phase as the contact member, which is connected between the R-phase side and a common connection point of the diodes D1 and D2, and an S-phase side of the low-voltage three-phase AC power supply And a low voltage side S-phase second contact as the contact member, which is connected between the diode D3 and the common connection point of the diodes D3 and D4. , D5, and the other end is connected to the anode-side common connection point of the diodes D2, D4, and D6, and further, the high-voltage three-phase AC power supply and the low-voltage three-phase The T-phase side of the AC power supply is connected to the diodes D5 and D6. During the forced excitation period, only the first contact for the high-voltage side R-phase and the first contact for the high-voltage side S-phase are turned on, and the low-voltage side during the holding period. Only the second contact for the R phase and the second contact for the low voltage side S phase are turned on.
[0036]
According to a twenty-third aspect of the present invention, in the elevator brake control device according to the twenty-second aspect, a low voltage inserted between the low voltage side R-phase second contact and a common connection point of the diodes D1 and D2. A low-voltage-side S-phase voltage dividing resistor interposed between the low-voltage-side S-phase second contact and the common connection point of the diodes D3 and D4; A low-voltage side T-phase voltage dividing resistor interposed between the T-phase of the low-voltage side three-phase AC power supply and a common connection point of the diodes D5 and D6.
[0037]
According to a twenty-fourth aspect of the present invention, when the brake release operation is performed by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is increased. A high-voltage three-phase AC power source and a low-voltage three-phase AC power source as the AC power supply unit. And three diodes D1, D3 and D5 forming the upper arm and diodes D2, D4 and D6 forming the lower arm are bridge-connected, and a three-phase rectifier circuit for performing the rectification, and a diode D7 for forming the upper arm , D9 and diodes D8, D10 forming the lower arm are bridge-connected, and a single-phase rectifier circuit for performing the rectification is provided. A first high-voltage R-phase contact as the contact member, which is connected between the R-phase side of the three-phase AC power supply and a common connection point of the diodes D1 and D2; A first contact for the high-voltage side S-phase as the contact member, which is connected between the S-phase side of the power supply and the common connection point of the diodes D3 and D4; A second contact for the low-voltage side R-phase as the contact member, which is connected between a phase side and a common connection point of the diodes D9 and D10, and an S-phase side of the low-voltage three-phase AC power supply; A low-voltage-side S-phase second contact as the contact member, which is connected between a common connection point of the diodes D7 and D8, and connects one end of the brake coil to the diodes D1, D3 and D3. D5, D7, and D9 are connected to the common connection point on the cathode side, and the other end is connected. Is connected to the common connection point on the anode side of the diodes D2, D4, D6, D8, and D10, and the T-phase side of the high-voltage three-phase AC power supply and the low-voltage three-phase AC power supply is connected to the diodes D5, D6. And the high voltage side R-phase first contact and the high voltage side S-phase first contact, and the low voltage side R-phase second contact during the forced excitation period. All of the low voltage side S-phase second contacts are turned on, and during the holding period, only the low voltage side R-phase second contact and the low voltage side S-phase second contact are turned on. , Is characterized.
[0038]
According to a twenty-fifth aspect of the present invention, in the elevator brake control device according to the twenty-fourth aspect, the low voltage interposed between the low voltage side R-phase second contact and a common connection point of the diodes D9 and D10. A low-voltage-side S-phase voltage dividing resistor interposed between the low-voltage-side S-phase second contact and a common connection point of the diodes D7 and D8; A low-voltage side T-phase voltage dividing resistor interposed between the T-phase of the low-voltage side three-phase AC power supply and a common connection point of the diodes D5 and D6.
[0039]
BEST MODE FOR CARRYING OUT THE INVENTION
FIGS. 1A and 1B are explanatory diagrams showing an embodiment of an elevator brake control device according to a first invention, wherein FIG. 1A is a circuit configuration diagram, and FIG. 1B is an operation waveform diagram. In FIG. 1A, one end of a single-phase AC power supply 1 serving as an AC power supply unit is connected to a brake coil 5 via a series connection including a block diode 2, a first contact 3, and a second contact 4. The other end of the brake coil 5 is directly connected to the other end of the single-phase AC power supply 1. A voltage dividing resistor 8 is connected in parallel to the second contact 4, and a freewheel diode 6 is connected in parallel to the brake coil 5.
[0040]
Next, the brake control operation of the device of FIG. 1A will be described based on the operation waveform diagram of FIG. First, during the forced excitation period, both the first contact 3 and the second contact 4 are in the ON state. In this state, the brake voltage applied to the brake coil 5 after being half-wave rectified by the block diode 2 is High voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a high current level. As is apparent from the half-wave rectified waveform of the brake voltage shown in FIG. 1B, the period in which the voltage application to the brake coil 5 is interrupted is intermittent. A continuous and flat braking current as shown can be obtained.
[0041]
Next, when the holding period starts, the second contact 4 is turned off and a voltage drop is caused by the voltage dividing resistor 8, so that the brake voltage applied to the brake coil 5 becomes a low voltage level. The brake current flowing through the brake coil 5 also has a low current level.
[0042]
Here, assuming that the brake voltage applied to the brake coil 5 is VBK and the effective voltage value of the single-phase AC power supply 1 is VAC, the brake voltage VBK during the forced excitation period is expressed by the following equation.
VBK = 0.45 × VAC
[0043]
That is, the brake voltage VBK during the forced excitation period is equal to or less than one half of the effective voltage value of the single-phase AC power supply 1, and is lower during the holding period. Therefore, as the first contact 3 and the second contact 4 in FIG. 1A, an AC load breaking contact can be used instead of a DC load breaking contact as in the conventional device. Accordingly, the resistance value of the voltage dividing resistor 8 can be much smaller than that of the conventional device. However, the effective voltage value VAC of the single-phase AC power supply 1 and the resistance value of the voltage dividing resistor 8 need to be appropriately selected in consideration of the rated voltage of the brake coil 5.
[0044]
As described above, in the configuration of FIG. 1, the first contact 3 and the second contact 4 serving as the contact members can use the AC load breaking contacts having a small capacity and a small size. Since the resistance value can be reduced, these members can be sufficiently arranged in the control panel of the machine roomless elevator system.
[0045]
In the description of the configuration shown in FIG. 2 and subsequent figures, the contact members such as the first contact and the second contact must use AC load breaking contacts. The fact that it is much smaller than the device, or that it is necessary to appropriately select the effective voltage value of the AC power supply unit, the resistance value of the voltage dividing resistor, etc. while taking into account the rated voltage of the brake coil 5, etc. Duplicate description will be omitted.
[0046]
2A and 2B are explanatory diagrams showing an embodiment of the elevator brake control device according to the second invention, wherein FIG. 2A is a circuit configuration diagram, and FIG. 2B is an operation waveform diagram. In FIG. 2A, a high-voltage single-phase AC power supply 1A and a low-voltage single-phase AC power supply 1B, which are AC power supply units, are connected in series. A first series connection is formed by the first contact 3 and the first block diode 2A, and a second series connection is formed by the second contact 4 and the second block diode 2B. One end of the high-voltage single-phase AC power supply 1A is connected to one end of the brake coil 5 via the first series connection body, and one end of the low-voltage single-phase AC power supply 1B is connected to the second series connection. It is also connected to one end of the brake coil 5 through the body. The other end of the brake coil 5 is connected to a common connection point between the high-voltage single-phase AC power supply 1A and the low-voltage single-phase AC power supply 1B. A freewheel diode 6 is connected to the brake coil 5 in parallel.
[0047]
Next, a brake control operation of the device of FIG. 2A will be described based on an operation waveform diagram of FIG. First, during the forced excitation period, only the first contact 3 is in the ON state. In this state, the high voltage from the high-voltage single-phase AC power supply 1A is half-wave rectified by the block diode 2A and is applied to the brake coil 5. Applied. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a high current level. At this time, assuming that the effective voltage value of the high-voltage single-phase AC power supply 1A is VACH, the brake voltage VBK1 during the forced excitation period is expressed by the following equation.
VBK1 = 0.45 × VACH
[0048]
Next, when the holding period starts, the first contact 3 is turned off and the second contact 4 is turned on. In this state, the low voltage from the low-voltage single-phase AC power supply 1B is half-wave rectified by the block diode 2B and applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage is also at a low current level. At this time, assuming that the effective voltage value of the low-voltage single-phase AC power supply 1B is VACL, the brake voltage VBK2 during the holding period is expressed by the following equation.
VBK2 = 0.45 × VACL
[0049]
3A and 3B are explanatory diagrams showing an embodiment of the elevator brake control device according to the third invention, wherein FIG. 3A is a circuit configuration diagram, and FIG. 3B is an operation waveform diagram. In FIG. 3A, the single-phase rectifier circuit 7 is configured by bridge-connecting diodes D1 and D3 forming an upper arm and diodes D2 and D4 forming a lower arm. One end of the single-phase AC power supply 1 is connected to a common connection point of the diodes D1 and D2 via a first contact 3 which is a contact member, and the other end of the single-phase AC power supply 1 is a contact member. It is connected to a common connection point of the diodes D3 and D4 via a certain second contact 4.
[0050]
One end of the brake coil 5 is connected to a common connection point on the cathode side of the diodes D1 and D3 of the single-phase rectifier circuit 7, and the other end is connected to a common connection point on the anode side of the diodes D2 and D4. .
[0051]
The anode side of the block diode 2 is connected to the anode-side common connection point of the diodes D2 and D4, and the cathode side of the block diode 2 is connected between the single-phase AC power supply 1 and the second contact 4. ing.
[0052]
Next, a brake control operation of the device of FIG. 3A will be described based on an operation waveform diagram of FIG. First, during the forced excitation period, both the first contact 3 and the second contact 4 are in the ON state. In this state, single-phase full-wave rectification is performed by the single-phase rectifier circuit 7 and applied to the brake coil 5. Brake voltage is at a high voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a high current level. The brake voltage VBK1 at this time is represented by the following equation, where the effective voltage value of the single-phase AC power supply 1 is VAC.
VBK1 = 0.9 × VAC
[0053]
Next, when the holding period starts, the second contact 4 is turned off, and the single-phase half-wave rectification is performed by the diode D1 and the block diode 2, so that the brake voltage applied to the brake coil 5 becomes a low voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of this low voltage is also at a low current level. The brake voltage VBK2 at this time is represented by the following equation.
VBK2 = 0.45 × VAC
[0054]
In the configuration shown in FIG. 3A, the free wheel diode 6 used in FIG. 1 or FIG. Although not provided, this is because the same commutation operation is performed through the path of the diodes D1, D2 or D3, D4 without newly providing the freewheel diode 6.
[0055]
4A and 4B are explanatory diagrams showing an embodiment of an elevator brake control device according to a fourth invention, wherein FIG. 4A is a circuit configuration diagram, and FIG. 4B is an operation waveform diagram. In FIG. 4A, a first single-phase AC power supply 1C and a second single-phase AC power supply 1D, which are AC power supply units, are connected in series. These AC power supplies 1C and 1D have phases opposite to each other. A first series connection is formed by the first contact 3 and the first block diode 2A, and a second series connection is formed by the second contact 4 and the second block diode 2B. One end of the first single-phase AC power supply 1C is connected to one end of the brake coil 5 via the first series connection body, and one end of the second single-phase AC power supply 1D is connected to the second series connection. It is also connected to one end of the brake coil 5 via the body. The other end of the brake coil 5 is connected to a common connection point between the first single-phase AC power supply 1C and the second single-phase AC power supply 1D. A freewheel diode 6 is connected to the brake coil 5 in parallel.
[0056]
Next, the brake control operation of the device of FIG. 4A will be described based on the operation waveform diagram of FIG. First, during the forced excitation period, both the first contact 3 and the second contact are in the ON state, and in this state, the voltage from the first single-phase AC power supply 1C and the second single-phase AC power supply 1D Is subjected to two-phase half-wave rectification by the block diodes 2A and 2B and applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 by this voltage application becomes a high current level. At this time, assuming that the effective voltage value of the first single-phase AC power supply 1C is VAC, the brake voltage VBK1 during the forced excitation period is expressed by the following equation.
VBK1 = 0.9 × VAC
[0057]
Next, when the holding period starts, the second contact 4 is turned off. In this state, only the voltage from the first single-phase AC power supply 1C is single-phase half-wave rectified by the first block diode 2A, and the brake coil 5 Is applied to Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level. At this time, assuming that the effective voltage value of the second single-phase AC power supply 1D is VAC, the brake voltage VBK2 during the holding period is expressed by the following equation.
VBK2 = 0.45 × VAC
[0058]
5A and 5B are explanatory diagrams showing an embodiment of the elevator brake control device according to the fifth invention, wherein FIG. 5A is a circuit configuration diagram, and FIG. 5B is an operation waveform diagram. In FIG. 5A, the single-phase rectifier circuit 7 is configured by bridge-connecting diodes D1 and D3 forming an upper arm and diodes D2 and D4 forming a lower arm. One end of the single-phase AC power supply 1 is connected to a common connection point of the diodes D1 and D2 via a first contact that is a contact member, and the other end of the single-phase AC power supply 1 is a contact member. It is connected to a common connection point of the diodes D3 and D4 via the second contact. A voltage dividing resistor 8 is connected in parallel to the second contact 4. One end of the brake coil 5 is connected to a common connection point on the cathode side of the diodes D1 and D3 of the single-phase rectifier circuit 7, and the other end is connected to a common connection point on the anode side of the diodes D2 and D4. .
[0059]
Next, the brake control operation of the device of FIG. 5A will be described based on the operation waveform diagram of FIG. First, during the forced excitation period, both the first contact 3 and the second contact 4 are in the ON state. In this state, single-phase full-wave rectification is performed by the single-phase rectifier circuit 7 and applied to the brake coil 5. Brake voltage is at a high voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a high current level. The brake voltage VBK1 at this time is represented by the following equation, where the effective voltage value of the single-phase AC power supply 1 is VAC.
VBK1 = 0.9 × VAC
[0060]
Next, when the holding period starts, the second contact 4 is turned off, and a voltage drop occurs due to the voltage dividing resistor 8, so that the brake voltage applied to the brake coil 5 becomes a low voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of this low voltage is also at a low current level.
[0061]
6A and 6B are explanatory diagrams showing an embodiment of the elevator brake control device according to the sixth invention, wherein FIG. 6A is a circuit configuration diagram, and FIG. 6B is an operation waveform diagram. In FIG. 6A, a high-voltage single-phase AC power supply 1A and a low-voltage single-phase AC power supply 1B, which are AC power supply units, are connected in series. The single-phase rectifier circuit 7 is configured by bridge-connecting diodes D1 and D3 forming an upper arm and diodes D2 and D4 forming a lower arm. One end of the high-voltage single-phase AC power supply 1A is connected to a common connection point of the diodes D1 and D2 via a first contact which is a contact member. , Are connected to a common connection point of the diodes D1 and D2 via a second contact as a contact member.
[0062]
One end of the brake coil 5 is connected to a common connection point on the cathode side of the diodes D1 and D3 of the single-phase rectifier circuit 7, and the other end is connected to a common connection point on the anode side of the diodes D2 and D4. The common connection point of the diodes D3 and D4 is connected to the common connection point of the high-voltage single-phase AC power supply 1A and the low-voltage single-phase AC power supply 1B.
[0063]
Next, the brake control operation of the device of FIG. 6A will be described based on the operation waveform diagram of FIG. First, only the first contact 3 is in the ON state during the forced excitation period. In this state, the high voltage from the high-voltage single-phase AC power supply 1A is subjected to full-wave rectification in the single-phase rectifier circuit 7 and the brake coil 5 Is applied. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a high current level. At this time, assuming that the effective voltage value of the high-voltage single-phase AC power supply 1A is VACH, the brake voltage VBK1 during the forced excitation period is expressed by the following equation.
VBK1 = 0.9 × VACH
[0064]
Next, when the holding period starts, the first contact 3 is turned off and the second contact 4 is turned on. In this state, the low voltage from the low-voltage single-phase AC power supply 1B is full-wave rectified by the single-phase rectifier circuit 7 and applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level. At this time, assuming that the effective voltage value of the low-voltage single-phase AC power supply 1B is VACL, the brake voltage VBK2 during the holding period is expressed by the following equation.
VBK2 = 0.9 × VACL
[0065]
7A and 7B are explanatory diagrams showing an embodiment of the elevator brake control device according to the seventh invention, wherein FIG. 7A is a circuit configuration diagram, and FIG. 7B is an operation waveform diagram. In FIG. 7A, a first single-phase AC power supply 1C and a second single-phase AC power supply 1D, which are AC power supply units, are connected in series. These AC power supplies 1C and 1D have phases opposite to each other. The first contact 3A, the second contact 4A, and the first blocking diode 2A form a first series-connected body, and the first contact 3B, the opposite contact 3B. A second series-connected body is formed by the phase-side second contact 4B and the second block diode 2B. Further, the order-phase side second contact 4A is connected in parallel with the order-phase side voltage dividing resistor 8A, and the anti-phase side second contact 4B is connected in parallel with the anti-phase side voltage dividing resistor 8B.
[0066]
One end of the first single-phase AC power supply 1C is connected to one end of the brake coil 5 via the first series connection body, and one end of the second single-phase AC power supply 1D is connected to the second series connection. It is also connected to one end of the brake coil 5 via the body. The other end of the brake coil 5 is connected to a common connection point between the first single-phase AC power supply 1C and the second single-phase AC power supply 1D.
[0067]
Next, the brake control operation of the device of FIG. 7A will be described based on the operation waveform diagram of FIG. 7B. First, during the forced excitation period, all of the first contacts 3A and 3B and the second contacts 4A and 4B are in the ON state. In this state, the first single-phase AC power supply 1C and the second single-phase AC The voltage from the power supply 1D is subjected to two-phase half-wave rectification by the block diodes 2A and 2B and applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 by this voltage application becomes a high current level. At this time, if the effective voltage value of the single-phase AC power supplies 1C and 1D is VAC, the brake voltage VBK1 during the forced excitation period is expressed by the following equation.
VBK1 = 0.9 × VAC
[0068]
Next, when the holding period starts, the second contacts 4A and 4B are turned off. In this state, a voltage drop occurs due to the voltage dividing resistors 8A and 8B, so that the brake voltage applied to the brake coil 5 becomes a low voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level.
[0069]
8A and 8B are explanatory diagrams showing an embodiment of an elevator brake control device according to the eighth invention, wherein FIG. 8A is a circuit configuration diagram, and FIG. 8B is an operation waveform diagram. In FIG. 8A, a three-phase AC power supply 9 as an AC power supply unit has R, S, and T phases, and a neutral point 10. For the three-phase AC power supply 9, for example, a transformer whose windings are star-connected can be used.
[0070]
The R-phase first contact 3R, the R-phase second contact 4R, and the R-phase block diode 2R form an R-phase series connection body, and the S-phase first contact 3S, the S-phase An S-phase series connection is formed by the second contact 4S and the S-phase block diode 2S, and the T-phase first contact 3T, the T-phase second contact 4T, and the T-phase block diode 2T. A series connection for the T phase is formed. The R-phase second contact 4R, the S-phase second contact 4S, and the T-phase second contact 4T are connected to the R-phase voltage dividing resistor 8R, the S-phase voltage dividing resistor 8S, and T, respectively. A phase voltage dividing resistor 8T is connected in parallel.
[0071]
One ends of the first contacts 3R, 3S, 3T are respectively connected to the R, S, and T phases of the three-phase AC power supply 9, and the cathodes of the block diodes 2R, 2S, 2T are commonly connected, The common connection point is connected to one end of the brake coil 5. The other end of the brake coil 5 is connected to the neutral point 10.
[0072]
Next, a brake control operation of the device of FIG. 8A will be described based on an operation waveform diagram of FIG. 8B. First, during the forced excitation period, all of the first contacts 3R, 3S, 3T and the second contacts 4R, 4S, 4T are in the ON state, and in this state, the voltage of each phase of the three-phase AC power supply 9 is reduced. Three-phase half-wave rectification is performed by the blocking diodes 2R, 2S, and 2T, and applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 by this voltage application becomes a high current level. At this time, assuming that the effective voltage value of the three-phase AC power supply 9 is VAC, the brake voltage VBK1 during the forced excitation period is expressed by the following equation.
VBK1 = 1.17 × VAC
[0073]
Next, when the holding period starts, the second contacts 4R, 4S, 4T are turned off. In this state, a voltage drop occurs due to the voltage dividing resistors 8R, 8S, 8T, so that the brake voltage applied to the brake coil 5 is low. Level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level.
[0074]
9A and 9B are explanatory diagrams showing an embodiment of the elevator brake control device according to the ninth invention, wherein FIG. 9A is a circuit configuration diagram, and FIGS. 9B and 9C are operation waveform diagrams. In FIG. 9A, a three-phase AC power supply 9 as an AC power supply unit has R, S, and T phases and a neutral point 10. For the three-phase AC power supply 9, for example, a transformer whose windings are star-connected can be used.
[0075]
The R-phase first contact 3R and the R-phase block diode 2R form an R-phase series connection body, and the S-phase first contact 3S and the S-phase block diode 2S form an S-phase series connection. A connection body is formed, and a T-phase series connection body is formed by the T-phase second contact 4T and the T-phase block diode 2T.
[0076]
One ends of the first contacts 3R, 3S and the second contact 4T are respectively connected to the R, S, and T phases of the three-phase AC power supply 9 and the cathodes of the block diodes 2R, 2S, 2T. Are connected in common, and the common connection point is connected to one end of the brake coil 5. The other end of the brake coil 5 is connected to the neutral point 10. A freewheel diode 6 is connected to the brake coil 5 in parallel.
[0077]
Next, the brake control operation of the device of FIG. 9A will be described based on the operation waveform diagrams of FIGS. 9B and 9C. FIG. 9B shows a case where the first contacts 3R and 3S are turned off and only the second contact 4T is turned on during the holding period, while FIG. 9C shows a case where the first contacts 3R and 3S are turned on during the holding period. 5 shows a case where the second contact 4T is turned off and only the first contacts 3R and 3S are turned on.
[0078]
First, starting from the case of FIG. 9B, during the forced excitation period, all of the first contacts 3R and 3S and the second contact 4T are in the ON state. Are subjected to three-phase half-wave rectification by the blocking diodes 2R, 2S, and 2T and applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 by this voltage application becomes a high current level. At this time, assuming that the effective voltage value of the three-phase AC power supply 9 is VAC, the brake voltage VBK1 during the forced excitation period is expressed by the following equation.
VBK1 = 1.17 × VAC
[0079]
Next, when the holding period starts, the first contacts 3R and 3S are turned off and only the second contact 4T is turned on, so that the voltage of only the T phase of the three-phase AC power supply 9 is changed to the single phase by the block diode 2T. Half-wave rectification is applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level. At this time, the brake voltage VBK2 during the holding period is expressed by the following equation.
VBK2 = 0.45 × VAC
[0080]
Next, the case of FIG. 9C will be described. During the forced excitation period, all of the first contacts 3R and 3S and the second contact 4T are in the ON state. Are subjected to three-phase half-wave rectification by the blocking diodes 2R, 2S, and 2T and applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 by this voltage application becomes a high current level. At this time, assuming that the effective voltage value of the three-phase AC power supply 9 is VAC, the brake voltage VBK1 during the forced excitation period is expressed by the following equation.
VBK1 = 1.17 × VAC
[0081]
Next, when the holding period starts, the second contact 4T is turned off and only the first contacts 3R and 3S are turned on, so that the voltage of only the R phase and the S phase of the three-phase AC power supply 9 is reduced by the blocking diode 2R. , 2S, and two-phase half-wave rectification is applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level.
[0082]
Here, the two-phase half-wave rectified waveform during the brake voltage holding period in FIG. 9C is the two-phase half-wave rectified waveform during the brake voltage forced excitation period in FIG. 4B and FIG. 7B. Is clearly different. The former is obtained by half-wave rectifying only two phases of the three-phase alternating current, while the latter is obtained by half-wave rectifying two single-phase alternating currents having phases opposite to each other and adding these. In this specification, the former, that is, the two-phase half-wave rectification in FIG. 9C is referred to as “quasi-two-phase half-wave rectification” to distinguish between them. FIGS. 10A and 10B are reference waveform diagrams showing a waveform obtained by the quasi-two-phase half-wave rectification in comparison with other rectified waveforms, wherein FIG. 10A shows a three-phase full-wave rectified waveform, and FIG. The waveform (c) shows a quasi-two-phase half-wave rectified waveform.
[0083]
The brake voltage VBK2 during the holding period in which the quasi-two-phase half-wave rectification is performed is expressed by the following equation.
VBK2 = 0.84 × VAC
[0084]
FIGS. 11A and 11B are explanatory diagrams showing an embodiment of the elevator brake control device according to the tenth invention, wherein FIG. 11A is a circuit configuration diagram, and FIG. 11B is an operation waveform diagram. In FIG. 11A, a three-phase AC power supply 9 as an AC power supply unit has R, S, and T phases, and a neutral point 10. For the three-phase AC power supply 9, for example, a transformer whose windings are star-connected can be used.
[0085]
The R-phase first contact 3R, the R-phase voltage dividing resistor 8R, and the R-phase block diode 2R form an R-phase series connection body. A series connection for the S phase is formed by the voltage resistor 8S and the block diode 2S for the S phase, and the second contact 4T for the T phase, the voltage dividing resistor 8T for the T phase, and the block diode 2T for the T phase for the T phase. A series connection is formed. Further, a third contact 11T for the T phase is connected in parallel to the T phase voltage dividing resistor 8T. The third contact 11T performs a b-contact operation on the first contacts 3R and 3S.
[0086]
One ends of the first contacts 3R, 3S and the second contact 4T are respectively connected to the R, S, and T phases of the three-phase AC power supply 9 and the cathodes of the block diodes 2R, 2S, 2T. Are connected in common, and the common connection point is connected to one end of the brake coil 5. The other end of the brake coil 5 is connected to the neutral point 10. A freewheel diode 6 is connected to the brake coil 5 in parallel.
[0087]
Next, the brake control operation of the device of FIG. 11A will be described based on the operation waveform diagram of FIG. First, during the forced excitation period, all of the first contacts 3R and 3S and the second contact 4T are in the ON state (the third contact 11T is the first contact 3R, 3S of the first contact 3R, 3S). In this state, the voltage of each phase of the three-phase AC power supply 9 is three-phase half-wave rectified by the block diodes 2R, 2S, and 2T and applied to the brake coil 5 in this state. . Therefore, the brake current flowing through the brake coil 5 by this voltage application becomes a high current level. However, in this state, a voltage drop occurs due to the voltage dividing resistors 8R, 8S, and 8T of each phase.
[0088]
Next, when the holding period starts, the first contacts 3R and 3S are turned off and only the second contact 4T is turned on, so that the voltage of only the T phase of the three-phase AC power supply 9 is changed to the single phase by the block diode 2T. Half-wave rectification is applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level. At this time, the third contact 11T for the T-phase is in the ON state, and no voltage drop occurs due to the voltage dividing resistor 8T for the T-phase. Therefore, the brake voltage VBK2 during the holding period is represented by the following equation.
VBK2 = 0.45 × VAC
[0089]
12A and 12B are explanatory diagrams showing an embodiment of the elevator brake control device according to the eleventh invention, wherein FIG. 12A is a circuit configuration diagram, and FIG. 12B is an operation waveform diagram. In FIG. 11A, a three-phase AC power supply 9 as an AC power supply unit has R, S, and T phases, and a neutral point 10. For the three-phase AC power supply 9, for example, a transformer whose windings are star-connected can be used.
[0090]
The R-phase first contact 3R, the R-phase second contact 4R, and the R-phase block diode 2R form an R-phase series connection body, and the S-phase first contact 3S, the S-phase An S-phase series connection body is formed by the second contact 4S and the S-phase block diode 2S, and the T-phase second contact 4T, the T-phase second contact 4T, and the T-phase block diode 2T. A series connection for the T phase is formed. An R-phase voltage dividing resistor 8R and an S-phase voltage dividing resistor 8S are connected in parallel to the R-phase second contact 4R and the S-phase second contact 4S, respectively.
[0091]
One ends of the first contacts 3R, 3S, 3T are respectively connected to the R, S, and T phases of the three-phase AC power supply 9, and the cathodes of the block diodes 2R, 2S, 2T are commonly connected, The common connection point is connected to one end of the brake coil 5. The other end of the brake coil 5 is connected to the neutral point 10. A freewheel diode 6 is connected to the brake coil 5 in parallel.
[0092]
Next, a brake control operation of the device of FIG. 12A will be described based on an operation waveform diagram of FIG. First, during the forced excitation period, all of the first contacts 3R, 3S, 3T and the second contacts 4R, 4S, 4T are in the ON state. In this state, the voltage of each phase of the three-phase AC power supply 9 is in this state. Is subjected to three-phase half-wave rectification by the block diodes 2R, 2S, and 2T, and is applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 by this voltage application becomes a high current level. At this time, assuming that the effective voltage value of the three-phase AC power supply 9 is VAC, the brake voltage VBK1 during the forced excitation period is expressed by the following equation.
VBK1 = 1.17 × VAC
[0093]
Next, when the holding period starts, the second contacts 4R, 4S, 4T are turned off and only the first contacts 3R, 3S, 3T are turned on, so that only the R-phase and S-phase of the three-phase AC power supply 9 are turned on. Is quasi-two-phase half-wave rectified by the block diodes 2R and 2S and applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level. However, in this state, a voltage drop occurs due to the R-phase and S-phase voltage dividing resistors 8R and 8S.
[0094]
FIGS. 13A and 13B are explanatory diagrams showing an embodiment of an elevator brake control device according to the twelfth invention, wherein FIG. 13A is a circuit configuration diagram, and FIG. 13B is an operation waveform diagram. In FIG. 13A, a three-phase AC power supply 9 as an AC power supply unit has R, S, and T phases and a neutral point 10. For the three-phase AC power supply 9, for example, a transformer whose windings are star-connected can be used.
[0095]
The R-phase first contact 3R, the R-phase second contact 4R, and the R-phase block diode 2R form an R-phase series connection body, and the S-phase first contact 3S, and the S-phase A series connection body for S phase is formed by the block diode 2S for S.
[0096]
One end of each of the first contacts 3R and 3S is connected to the R and S phases of the three-phase AC power supply 9, respectively. However, nothing is connected to the T phase, and the load side terminal is open. The cathode sides of the block diodes 2R and 2S are commonly connected, and the common connection point is connected to one end of the brake coil 5. The other end of the brake coil 5 is connected to the neutral point 10. A freewheel diode 6 is connected to the brake coil 5 in parallel.
[0097]
Next, the brake control operation of the device of FIG. 13A will be described based on the operation waveform diagram of FIG. First, during the forced excitation period, all of the first contacts 3R and 3S and the second contact 4R are in the ON state. In this state, the voltages of the R and S phases of the three-phase AC power supply 9 are changed to the block diode. The quasi-two-phase half-wave rectified by 2R and 2S is applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 by this voltage application becomes a high current level. At this time, assuming that the effective voltage value of the three-phase AC power supply 9 is VAC, the brake voltage VBK1 during the forced excitation period is expressed by the following equation.
VBK1 = 0.84 × VAC
[0098]
Next, when the holding period starts, the second contact 4R is turned off and only the first contacts 3R and 3S are turned on, so that only the S-phase voltage of the three-phase AC power supply 9 is changed to the single-phase voltage by the block diode 2S. Half-wave rectification is applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level. At this time, the brake voltage VBK2 during the holding period is expressed by the following equation.
VBK2 = 0.45 × VAC
[0099]
14A and 14B are explanatory diagrams showing an embodiment of the elevator brake control device according to the thirteenth invention, wherein FIG. 14A is a circuit configuration diagram, and FIG. 14B is an operation waveform diagram. In FIG. 14A, a three-phase AC power supply 9 as an AC power supply unit has R, S, and T phases and a neutral point 10. For the three-phase AC power supply 9, for example, a transformer whose windings are star-connected can be used.
[0100]
The R-phase first contact 3R, the R-phase second contact 4R, and the R-phase block diode 2R form an R-phase series connection body, and the S-phase first contact 3S, the S-phase An S-phase series connection body is formed by the second contact 4S and the S-phase block diode 2S. An S-phase voltage dividing resistor 8S is connected in parallel to the S-phase second contact 4S.
[0101]
One end of each of the first contacts 3R and 3S is connected to the R and S phases of the three-phase AC power supply 9, respectively. However, nothing is connected to the T phase, and the load side terminal is open. The cathode sides of the block diodes 2R and 2S are commonly connected, and the common connection point is connected to one end of the brake coil 5. The other end of the brake coil 5 is connected to the neutral point 10. A freewheel diode 6 is connected to the brake coil 5 in parallel.
[0102]
Next, the brake control operation of the device of FIG. 14A will be described based on the operation waveform diagram of FIG. First, during the forced excitation period, all of the first contacts 3R and 3S and the second contacts 4R and 4S are in an ON state, and in this state, the voltages of the R and S phases of the three-phase AC power supply 9 are reduced. The quasi-two-phase half-wave rectified by the blocking diodes 2R and 2S is applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 by this voltage application becomes a high current level. At this time, assuming that the effective voltage value of the three-phase AC power supply 9 is VAC, the brake voltage VBK1 during the forced excitation period is expressed by the following equation.
VBK1 = 0.84 × VAC
[0103]
Next, when the holding period starts, the second contacts 4R and 4S are turned off and only the first contacts 3R and 3S are turned on, so that only the S-phase voltage of the three-phase AC power supply 9 is applied by the blocking diode 2S. The single-phase half-wave rectification is applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level. However, in this state, a voltage drop occurs due to the S-phase voltage dividing resistor 8S.
[0104]
FIGS. 15A and 15B are explanatory diagrams showing an embodiment of the elevator brake control device according to the fourteenth invention, wherein FIG. 15A is a circuit configuration diagram, and FIG. 15B is an operation waveform diagram. In FIG. 15A, a three-phase AC power supply 12 and a single-phase AC power supply 1 are used as an AC power supply unit. The three-phase AC power supply 12 does not need to have the neutral point 10 like the three-phase AC power supply 9 in FIGS. 8, 9, and 11 to 14. Therefore, as the three-phase AC power supply 12, either a transformer in which the windings are star-connected or a transformer in which the windings are delta-connected can be used.
[0105]
The three-phase rectifier circuit 13 is configured by bridge-connecting diodes D1, D3, D5 forming an upper arm and diodes D2, D4, D6 forming a lower arm. The R-phase side of the three-phase AC power supply 12 is connected to a common connection point of the diodes D1 and D2 via the R-phase first contact 3R, which is a contact member. Are connected to a common connection point of the diodes D3 and D4 via an S-phase first contact 3S as a contact member. One end of the single-phase AC power supply 1 is connected to a common connection point of the diodes D1 and D2 via a single-phase second contact 4M and a single-phase voltage dividing resistor 8M connected in series to the second contact 4M. I have.
[0106]
One end of the brake coil 5 is connected to the cathode-side common connection point of the diodes D1, D3, and D5 of the three-phase rectifier circuit 13, and the other end is connected to the anode-side common connection point of the diodes D2, D4, and D6. It is connected. The T-phase side of the three-phase AC power supply 12 and the other end of the single-phase AC power supply 1 are directly connected to a common connection point of the diodes D5 and D6.
[0107]
Next, the brake control operation of the device of FIG. 15A will be described based on the operation waveform diagram of FIG. First, only the first contacts 3R and 3S are in the on state during the forced excitation period. In this state, the brake voltage applied to the brake coil 5 after being subjected to three-phase full-wave rectification by the three-phase rectifier circuit 13 is high. Voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a high current level. The brake voltage VBK1 at this time is represented by the following equation, where the effective voltage value of the three-phase AC power supply 12 is VAC.
VBK1 = 1.35 × VAC
[0108]
Next, in the holding period, the first contacts 3R and 3S are turned off and the single-phase second contact 4M is turned on, so that the diodes D1, D2 and D5 and D6 form a single-phase full-wave rectifier circuit. The voltage of the single-phase AC power supply 1 alone is subjected to single-phase full-wave rectification and applied to the brake coil 5. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level. However, in this state, a voltage drop occurs due to the single-phase voltage dividing resistor 8M.
[0109]
In the example shown in FIG. 15A, the single-phase voltage dividing resistor 8M is connected in series to the single-phase second contact 4M, but the single-phase voltage dividing resistor 8M can be omitted. is there. When the voltage dividing resistor 8M is omitted, the brake voltage VBK2 during the holding period is expressed by the following equation.
VBK2 = 0.9 × VAC
[0110]
FIGS. 16A and 16B are explanatory diagrams showing an embodiment of an elevator brake control device according to the fifteenth invention, wherein FIG. 16A is a circuit configuration diagram, and FIG. 16B is an operation waveform diagram. In FIG. 16A, a three-phase AC power supply 12 and a single-phase AC power supply 1 are used as an AC power supply unit. The three-phase AC power supply 12 does not need to have the neutral point 10 like the three-phase AC power supply 9 in FIGS. 8, 9, and 11 to 14. Therefore, as the three-phase AC power supply 12, either a transformer in which the windings are star-connected or a transformer in which the windings are delta-connected can be used.
[0111]
The three-phase rectifier circuit 13 is configured by bridge-connecting diodes D1, D3, and D5 forming an upper arm and diodes D2, D4, and D6 forming a lower arm. Diode series connected bodies formed by the diodes D7 and D8 are connected in parallel. The R-phase side of the three-phase AC power supply 12 is connected to a common connection point of the diodes D1 and D2 via the R-phase first contact 3R, which is a contact member. Are connected to a common connection point of the diodes D3 and D4 via an S-phase first contact 3S as a contact member. One end of the single-phase AC power supply 1 is connected to a common connection point of the diodes D7 and D8 via a single-phase second contact 4M and a single-phase voltage dividing resistor 8M connected in series to the second contact 4M. I have.
[0112]
One end of the brake coil 5 is connected to the cathode-side common connection point of the three-phase rectifier circuit 13 and the diodes D1, D3, D5, D7 of the diode series connection, and the other end is connected to the diodes D2, D4, D6. , D8 to the common connection point on the anode side. The T-phase side of the three-phase AC power supply 12 and the other end of the single-phase AC power supply 1 are directly connected to a common connection point of the diodes D5 and D6.
[0113]
Next, the brake control operation of the device of FIG. 16A will be described based on the operation waveform diagram of FIG. First, during the forced excitation period, all of the first contacts 3R and 3S and the single-phase second contact 4M are in the ON state. In this state, the three-phase rectifier circuit 13 outputs a three-phase full-wave rectified voltage. At this time, a single-phase full-wave rectifier circuit for the single-phase AC power supply 1 is formed by the diodes D5 to D8, and the single-phase full-wave rectifier circuit may output a single-phase full-wave rectified voltage. I do. However, since the voltage drop is caused by the single-phase voltage dividing resistor 8M, the voltage to be output from the single-phase full-wave rectifier circuit is lower than the voltage to be output from the three-phase rectifier circuit 13. I have. Therefore, in practice, only the three-phase full-wave rectified brake voltage from the three-phase rectifier circuit 13 is applied to the brake coil 5 at a high voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a high current level. The brake voltage VBK1 at this time is represented by the following equation, where the effective voltage value of the three-phase AC power supply 12 is VAC.
VBK1 = 1.35 × VAC
[0114]
Next, when the holding period starts, the first contacts 3R and 3S are turned off and the single-phase second contact 4M is turned on, so that the single-phase full-wave rectifier circuit formed by the diodes D5 to D8 is performed. Is subjected to single-phase full-wave rectification and applied to the brake coil 5 at a low voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level. However, in this state, a voltage drop occurs due to the single-phase voltage dividing resistor 8M.
[0115]
As is apparent from the above description, in the present embodiment, the diodes D5 and D6 are connected to both the three-phase rectifier circuit 13 used during the forced excitation period and the single-phase full-wave rectifier circuit used during the hold period. Since they are also used, only the diode series connection formed by the diodes D7 and D8 needs to be newly added. That is, it is not necessary to add a single-phase full-wave rectifier circuit completely separate from the three-phase rectifier circuit 13 as it is, and an increase in the number of diodes constituting the rectifier circuit is suppressed as much as possible.
[0116]
In the example shown in FIG. 16A, the single-phase voltage dividing resistor 8M is connected in series to the single-phase second contact 4M, but the single-phase voltage dividing resistor 8M can be omitted. is there. When the voltage dividing resistor 8M is omitted, the brake voltage VBK2 during the holding period is expressed by the following equation.
VBK2 = 0.9 × VAC
[0117]
In the example shown in FIG. 16B, all of the first contacts 3R and 3S and the second contact 4M are turned on during the forced excitation period, but the second contact 4M is turned off. It may be. However, it is needless to say that the first contacts 3R and 3S must always be turned on.
[0118]
FIGS. 17A and 17B are explanatory diagrams showing an embodiment of the elevator brake control device according to the sixteenth invention, wherein FIG. 17A is a circuit configuration diagram, and FIG. 17B is an operation waveform diagram. In FIG. 17A, a three-phase AC power supply 12 and a single-phase AC power supply 1 are used as an AC power supply unit. The three-phase AC power supply 12 does not need to have the neutral point 10 like the three-phase AC power supply 9 in FIGS. 8, 9, and 11 to 14. Therefore, as the three-phase AC power supply 12, either a transformer in which the windings are star-connected or a transformer in which the windings are delta-connected can be used. However, in this embodiment, a delta-connected transformer without a neutral point is used.
[0119]
The three-phase rectifier circuit 13 is configured by bridge-connecting diodes D1, D3, D5 forming an upper arm and diodes D2, D4, D6 forming a lower arm. The R-phase side of the three-phase AC power supply 12 is connected to the common connection point of the diodes D1 and D2 via the R-phase first contact 3R as a contact member, and the S-phase side is directly connected to the diodes D3 and D4. , And the T-phase side is connected to a common connection point of the diodes D5 and D6 via a T-phase second contact 4T which is a contact member.
[0120]
One end of the brake coil 5 is connected to the cathode-side common connection point of the diodes D1, D3, and D5 of the three-phase rectifier circuit 13, and the other end is connected to the anode-side common connection point of the diodes D2, D4, and D6. It is connected.
[0121]
Next, the brake control operation of the device of FIG. 17A will be described based on the operation waveform diagram of FIG. 17B. First, during the forced excitation period, both the first contact 3R and the second contact 4T are in the ON state. In this state, the three-phase rectifier circuit 13 performs three-phase full-wave rectification and applies it to the brake coil 5. Brake voltage is at a high voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a high current level. The brake voltage VBK1 at this time is represented by the following equation, where the effective voltage value of the three-phase AC power supply 12 is VAC.
VBK1 = 1.35 × VAC
[0122]
Next, when the holding period starts, the T-phase second contact 4T is turned off, so that a single-phase full-wave rectifier circuit is formed by the diodes D1, D2 and D3, D4. When the power supply 12 has a star connection, a quasi-two-phase half-wave rectified voltage is applied to the brake coil 5 as a low voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level. The brake voltage VBK2 at this time is represented by the following equation.
VBK2 = 0.9 × VAC
[0123]
FIGS. 18 (a) and 18 (b) are explanatory diagrams showing an embodiment of an elevator brake control device according to the seventeenth invention, wherein (a) is a circuit configuration diagram and (b) is an operation waveform diagram. In FIG. 18A, a three-phase AC power supply 12 and a single-phase AC power supply 1 are used as an AC power supply unit. The three-phase AC power supply 12 does not need to have the neutral point 10 like the three-phase AC power supply 9 in FIGS. 8, 9, and 11 to 14. Therefore, as the three-phase AC power supply 12, either a transformer in which the windings are star-connected or a transformer in which the windings are delta-connected can be used. However, in this embodiment, a delta-connected transformer without a neutral point is used.
[0124]
The three-phase rectifier circuit 13 is configured by bridge-connecting diodes D1, D3, D5 forming an upper arm and diodes D2, D4, D6 forming a lower arm.
[0125]
The R-phase side of the three-phase AC power supply 12 is connected to the common connection point of the diodes D1 and D2 via the R-phase second contact 4R as a contact member, and the S-phase side is for the S-phase as a contact member. It is connected to the common connection point of the diodes D3 and D4 via the second contact 4S, and the T-phase side is connected to the common connection point of the diodes D5 and D6 via the T-phase first contact 3T which is a contact member. Have been. An R-phase voltage dividing resistor 8R is connected in parallel to the R-phase second contact 4R.
[0126]
One end of the brake coil 5 is connected to the cathode-side common connection point of the diodes D1, D3, and D5 of the three-phase rectifier circuit 13, and the other end is connected to the anode-side common connection point of the diodes D2, D4, and D6. It is connected.
[0127]
Next, the brake control operation of the device in FIG. 18A will be described based on the operation waveform diagram in FIG. First, during the forced excitation period, all of the second contacts 4R, 4S and the first contact 3T are in the ON state. In this state, the three-phase rectifier circuit 13 performs three-phase full-wave rectification, and the brake coil 5 The applied brake voltage is at a high voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a high current level. The brake voltage VBK1 at this time is represented by the following equation, where the effective voltage value of the three-phase AC power supply 12 is VAC.
VBK1 = 1.35 × VAC
[0128]
Next, when the holding period starts, the second contacts 4R and 4S are turned off, so that a single-phase full-wave rectification circuit is formed by the diodes D1, D2 and D5 and D6, and the single-phase full-wave rectification (three-phase AC power supply) is performed. In the case where 12 is a star connection, quasi-two-phase half-wave rectification) is applied to the brake coil 5 as a low voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a low current level. However, in this state, a voltage drop occurs due to the R-phase voltage dividing resistor 8R.
[0129]
FIGS. 19A and 19B are explanatory diagrams showing an embodiment of the elevator brake control device according to the eighteenth invention, wherein FIG. 19A is a circuit configuration diagram, and FIG. 19B is an operation waveform diagram. In FIG. 19A, a three-phase AC power supply 12 is used as an AC power supply unit. The three-phase AC power supply 12 does not need to have the neutral point 10 like the three-phase AC power supply 9 in FIGS. 8, 9, and 11 to 14. Therefore, as the three-phase AC power supply 12, either a transformer in which the windings are star-connected or a transformer in which the windings are delta-connected can be used.
[0130]
The three-phase rectifier circuit 13 is configured by bridge-connecting diodes D1, D3, D5 forming an upper arm and diodes D2, D4, D6 forming a lower arm.
[0131]
An R-phase series connection body is formed by the R-phase first contact 3R and the R-phase second contact 4R, and the R-phase voltage dividing resistor 8R is connected to the R-phase second contact 4R. Are connected in parallel. One end of the R-phase series connection body is connected to the R-phase side of the three-phase AC power supply 12, and the other end is connected to a common connection point of the diodes D1 and D2.
[0132]
Similarly, the S-phase first contact 3S and the S-phase second contact 4S form an S-phase series connection body. The S-phase second contact 4S is connected to the S-phase voltage dividing resistor. 8S are connected in parallel. One end of the S-phase series connection body is connected to the S-phase side of the three-phase AC power supply 12, and the other end is connected to a common connection point of the diodes D3 and D4.
[0133]
Similarly, a T-phase series connection body is formed by the T-phase first contact 3T and the T-phase second contact 4T, and the T-phase voltage dividing resistor is connected to the T-phase second contact 4T. 8T are connected in parallel. One end of the series connection body for the T phase is connected to the T phase of the three-phase AC power supply 12, and the other end is connected to a common connection point of the diodes D5 and D6.
[0134]
One end of the brake coil 5 is connected to the cathode-side common connection point of the diodes D1, D3, and D5 of the three-phase rectifier circuit 13, and the other end is connected to the anode-side common connection point of the diodes D2, D4, and D6. It is connected.
[0135]
Next, the brake control operation of the device of FIG. 19A will be described based on the operation waveform diagram of FIG. 19B. First, during the forced excitation period, all of the first contacts 3R, 3S, 3T and the second contacts 4R, 4S, 4T are in the ON state. In this state, the three-phase rectifier circuit 13 performs three-phase full-wave rectification. Then, the brake voltage applied to the brake coil 5 becomes a high voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a high current level. The brake voltage VBK1 at this time is represented by the following equation, where the effective voltage value of the three-phase AC power supply 12 is VAC.
VBK1 = 1.35 × VAC
[0136]
Next, in the holding period, the second contacts 4R, 4S, 4T are turned off and a voltage drop is caused by the voltage dividing resistors 8R, 8S, 8T, so that the brake voltage applied to the brake coil 5 becomes a low voltage level, Therefore, the brake current flowing through the brake coil 5 due to the application of the low voltage is also at a low current level.
[0137]
FIGS. 20A and 20B are explanatory diagrams showing an embodiment of the elevator brake control device according to the nineteenth invention, wherein FIG. 20A is a circuit configuration diagram, and FIG. 20B is an operation waveform diagram. In FIG. 20A, a high-voltage three-phase AC power supply 12A and a low-voltage three-phase AC power supply 12B are used as AC power supply units. These three-phase AC power supplies 12A and 12B need not have the neutral point 10 like the three-phase AC power supplies 9 in FIGS. 8, 9, and 11 to 14. Therefore, for these three-phase AC power supplies 12A and 12B, either a transformer in which the windings are star-connected or a transformer in which the windings are delta-connected can be used.
[0138]
The three-phase rectifier circuit 13 is configured by bridge-connecting diodes D1, D3, D5 forming an upper arm and diodes D2, D4, D6 forming a lower arm.
[0139]
The R-phase side of the high-voltage three-phase AC power supply 12A is connected to a common connection point of the diodes D1 and D2 via a high-voltage-side R-phase first contact 3RH that is a contact member, and the S-phase side is a contact. It is connected to the common connection point of the diodes D3 and D4 via the high voltage side S-phase first contact 3SH which is a member, and the T-phase side is directly connected to the common connection point of the diodes D5 and D6.
[0140]
The R-phase side of the low-voltage side three-phase AC power supply 12B is connected to a diode via a low-voltage side R-phase second contact 4RL which is a contact member and a low-voltage R-phase voltage dividing resistor 8RL connected in series to the second contact 4RL. The S-phase side is connected to a common connection point of D1 and D2, and the S-phase side is connected via a low-voltage-side S-phase second contact 4SL which is a contact member and a low-voltage-side S-phase voltage dividing resistor 8SL connected in series to the second contact 4SL. The T-phase side is connected to a common connection point of the diodes D5 and D6 via a low-voltage side T-phase voltage dividing resistor 8TL.
[0141]
One end of the brake coil 5 is connected to the cathode-side common connection point of the diodes D1, D3, and D5 of the three-phase rectifier circuit 13, and the other end is connected to the anode-side common connection point of the diodes D2, D4, and D6. It is connected.
[0142]
Next, a brake control operation of the device of FIG. 20A will be described based on an operation waveform diagram of FIG. First, during the forced excitation period, only the first contacts 3RH and 3SH are in the ON state. In this state, the three-phase AC voltage from the high-voltage three-phase AC power supply 12A is supplied to the three-phase rectifier circuit 13 for all three phases. Since the wave rectification is performed, the brake voltage applied to the brake coil 5 becomes a high voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a high current level. The brake voltage VBK1 at this time is represented by the following equation, where VACH is the effective voltage value of the three-phase AC power supply 12A.
VBK1 = 1.35 × VACH
[0143]
Next, when the holding period starts, the first contacts 3RH and 3SH are turned off, and only the second contacts 4RL and 4SL are turned on. In this state, the three-phase AC voltage from the low-voltage side three-phase AC power supply 12B is subjected to three-phase full-wave rectification by the three-phase rectifier circuit 13, and a voltage drop is caused by the voltage dividing resistors 8RL, 8SL, and 8TL. The brake voltage applied to the coil 5 is at a low voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of this low voltage is also at a low current level.
[0144]
In the example shown in FIG. 20A, the voltage dividing resistors 8RL, 8SL, and 8TL are inserted in each phase of the low-voltage three-phase AC power supply 12B. However, these voltage dividing resistors can be omitted. is there. When these voltage dividing resistors are omitted, the brake voltage VBK2 during the holding period is. Assuming that the effective voltage value of the three-phase AC power supply 12B is VACL, it is expressed by the following equation.
VBK2 = 1.35 × VACL
[0145]
FIGS. 21A and 21B are explanatory diagrams showing an embodiment of an elevator brake control device according to the twentieth invention, wherein FIG. 21A is a circuit configuration diagram, and FIG. 21B is an operation waveform diagram. In FIG. 21A, a high-voltage three-phase AC power supply 12A and a low-voltage three-phase AC power supply 12B are used as AC power supply units. These three-phase AC power supplies 12A and 12B need not have the neutral point 10 like the three-phase AC power supplies 9 in FIGS. 8, 9, and 11 to 14. Therefore, for these three-phase AC power supplies 12A and 12B, either a transformer in which the windings are star-connected or a transformer in which the windings are delta-connected can be used.
[0146]
The three-phase rectifier circuit 13 is configured by bridge-connecting diodes D1, D3, D5 forming an upper arm and diodes D2, D4, D6 forming a lower arm. The single-phase rectifier circuit 14 is configured by bridge-connecting diodes D7 and D9 forming an upper arm and diodes D8 and D10 forming a lower arm.
[0147]
The R-phase side of the high-voltage three-phase AC power supply 12A is connected to a common connection point of the diodes D1 and D2 via a high-voltage-side R-phase first contact 3RH that is a contact member, and the S-phase side is a contact. It is connected to the common connection point of the diodes D3 and D4 via the high voltage side S-phase first contact 3SH which is a member, and the T-phase side is directly connected to the common connection point of the diodes D5 and D6.
[0148]
The R-phase side of the low-voltage side three-phase AC power supply 12B is connected to a diode via a low-voltage side R-phase second contact 4RL which is a contact member and a low-voltage R-phase voltage dividing resistor 8RL connected in series to the second contact 4RL. The S-phase side is connected to the common connection point of D9 and D10, and the S-phase side is connected via a low-voltage-side S-phase second contact 4SL as a contact member and a low-voltage-side S-phase voltage dividing resistor 8SL connected in series to this. The T-phase side is connected to the common connection point of the diodes D5 and D6 via the low-voltage side T-phase voltage dividing resistor 8TL. It should be noted that the order of illustration for each phase of the low-voltage three-phase AC power supply 12B is opposite to that in the case of FIG.
[0149]
One end of the brake coil 5 is connected to the cathode-side common connection point of the diodes D1, D3, D5, D7, and D9 of the three-phase rectifier circuit 13 and the single-phase rectifier circuit 14, and the other end is connected to the diode D2. D4, D6, D8, and D10 are connected to common connection points on the anode side.
[0150]
Next, the brake control operation of the device of FIG. 21A will be described based on the operation waveform diagram of FIG. First, during the forced excitation period, all of the first contacts 3RH and 3SH and the second contacts 4RL and 4SL are in the ON state. In this state, the three-phase rectifier circuit 13 supplies the high-voltage three-phase AC power 12A. Is subjected to three-phase full-wave rectification and output. At this time, a three-phase full-wave rectifier circuit for the low-voltage three-phase AC power supply 12B is formed by the diodes D5 to D10, and the three-phase full-wave rectifier circuit also outputs a three-phase full-wave rectified voltage. Trying to be. However, the voltage of the three-phase AC power supply 12B is originally lower than the voltage of the three-phase AC power supply 12A, and a voltage drop is caused by the voltage dividing resistors 8RL, 8SL, and 8TL. Only the output voltage from the three-phase rectifier circuit 13 is applied to the brake coil 5 as a high voltage level brake voltage. Therefore, the brake current flowing through the brake coil 5 due to the application of the voltage also becomes a high current level. The brake voltage VBK1 at this time is represented by the following equation, where VACH is the effective voltage value of the three-phase AC power supply 12A.
VBK1 = 1.35 × VACH
[0151]
Next, when the holding period starts, the first contacts 3RH and 3SH are turned off, and only the second contacts 4RL and 4SL are turned on. In this state, the three-phase AC voltage from the low-voltage side three-phase AC power supply 12B is subjected to three-phase full-wave rectification by a three-phase rectifier circuit formed by diodes D5 to D10, and furthermore, the voltage generated by the voltage dividing resistors 8RL, 8SL, and 8TL. Since a drop has occurred, the brake voltage applied to the brake coil 5 has a low voltage level. Therefore, the brake current flowing through the brake coil 5 due to the application of this low voltage is also at a low current level.
[0152]
As apparent from the above description, in the present embodiment, the diodes D5 and D6 are used as both the three-phase rectifier circuit 13 used during the forced excitation period and the three-phase rectifier circuit used during the hold period. Therefore, only the single-phase rectifier circuit 14 formed by the diodes D7, D8, D9, and D10 needs to be newly added. That is, it is not necessary to separately add a three-phase rectifier circuit similar to the three-phase rectifier circuit 13, and an increase in the number of diodes constituting the rectifier circuit is suppressed as much as possible.
[0153]
In the example shown in FIG. 21A, the voltage dividing resistors 8RL, 8SL, and 8TL are inserted in each phase of the low-voltage three-phase AC power supply 12B, but these voltage dividing resistors can be omitted. is there. When these voltage dividing resistors are omitted, the brake voltage VBK2 during the holding period is. Assuming that the effective voltage value of the three-phase AC power supply 12B is VACL, it is expressed by the following equation.
VBK2 = 1.35 × VACL
[0154]
【The invention's effect】
As described above, according to the present invention, an AC load breaking contact having a smaller capacity than a DC load breaking contact can be used as a contact member. Further, even if the voltage dividing resistor can be omitted or the voltage dividing resistor must be used, the capacity can be reduced. Therefore, it is possible to realize an elevator brake control device including members that are small enough to be provided in a control panel of a machine roomless elevator system.
[Brief description of the drawings]
FIGS. 1A and 1B are explanatory diagrams showing an embodiment of an elevator brake control device according to a first invention, wherein FIG. 1A is a circuit configuration diagram, and FIG. 1B is an operation waveform diagram.
FIGS. 2A and 2B are explanatory diagrams showing an embodiment of an elevator brake control device according to a second invention, wherein FIG. 2A is a circuit configuration diagram, and FIG. 2B is an operation waveform diagram.
FIGS. 3A and 3B are explanatory diagrams showing an embodiment of an elevator brake control device according to a third invention, wherein FIG. 3A is a circuit configuration diagram, and FIG. 3B is an operation waveform diagram.
FIGS. 4A and 4B are explanatory diagrams showing an embodiment of an elevator brake control device according to a fourth invention, wherein FIG. 4A is a circuit configuration diagram, and FIG. 4B is an operation waveform diagram.
FIGS. 5A and 5B are explanatory diagrams showing an embodiment of an elevator brake control device according to a fifth invention, wherein FIG. 5A is a circuit configuration diagram, and FIG. 5B is an operation waveform diagram.
6A and 6B are explanatory diagrams showing an embodiment of an elevator brake control device according to a sixth invention, wherein FIG. 6A is a circuit configuration diagram, and FIG. 6B is an operation waveform diagram.
FIGS. 7A and 7B are explanatory diagrams showing an embodiment of an elevator brake control device according to a seventh invention, wherein FIG. 7A is a circuit configuration diagram, and FIG. 7B is an operation waveform diagram.
FIGS. 8A and 8B are explanatory diagrams showing an embodiment of an elevator brake control device according to an eighth invention, wherein FIG. 8A is a circuit configuration diagram, and FIG. 8B is an operation waveform diagram.
FIGS. 9A and 9B are explanatory diagrams showing an embodiment of an elevator brake control device according to a ninth invention, wherein FIG. 9A is a circuit configuration diagram, and FIGS. 9B and 9C are operation waveform diagrams.
10A and 10B are reference waveform diagrams showing a waveform obtained by quasi-two-phase half-wave rectification performed in the embodiment of FIG. 9 in comparison with other rectified waveforms, where FIG. 10A is a three-phase full-wave rectified waveform, and FIG. ) Shows a three-phase half-wave rectified waveform, and (c) shows a quasi-two-phase half-wave rectified waveform.
FIGS. 11A and 11B are explanatory diagrams showing an embodiment of an elevator brake control device according to the tenth invention, wherein FIG. 11A is a circuit configuration diagram, and FIG. 11B is an operation waveform diagram.
FIGS. 12A and 12B are explanatory diagrams showing an embodiment of the elevator brake control device according to the eleventh invention, wherein FIG. 12A is a circuit configuration diagram and FIG. 12B is an operation waveform diagram.
13A and 13B are explanatory diagrams showing an embodiment of an elevator brake control device according to a twelfth invention, wherein FIG. 13A is a circuit configuration diagram, and FIG. 13B is an operation waveform diagram.
14A and 14B are explanatory diagrams showing an embodiment of an elevator brake control device according to a thirteenth invention, wherein FIG. 14A is a circuit configuration diagram, and FIG. 14B is an operation waveform diagram.
15A and 15B are explanatory diagrams showing an embodiment of an elevator brake control device according to a fourteenth invention, wherein FIG. 15A is a circuit configuration diagram, and FIG. 15B is an operation waveform diagram.
16A and 16B are explanatory diagrams showing an embodiment of the elevator brake control device according to the fifteenth invention, wherein FIG. 16A is a circuit configuration diagram, and FIG. 16B is an operation waveform diagram.
FIGS. 17A and 17B are explanatory diagrams showing an embodiment of an elevator brake control device according to a sixteenth invention, wherein FIG. 17A is a circuit configuration diagram, and FIG.
FIGS. 18A and 18B are explanatory diagrams showing an embodiment of an elevator brake control device according to a seventeenth invention, wherein FIG. 18A is a circuit configuration diagram, and FIG.
FIGS. 19A and 19B are explanatory diagrams showing an embodiment of an elevator brake control device according to an eighteenth invention, wherein FIG. 19A is a circuit configuration diagram, and FIGS. 19B and 19C are operation waveform diagrams.
FIGS. 20A and 20B are explanatory diagrams showing an embodiment of an elevator brake control device according to a nineteenth invention, wherein FIG. 20A is a circuit configuration diagram, and FIG.
FIGS. 21A and 21B are explanatory diagrams showing an embodiment of an elevator brake control device according to a twentieth invention, wherein FIG. 21A is a circuit configuration diagram, and FIG. 21B is an operation waveform diagram.
FIGS. 22A and 22B are explanatory diagrams of a conventional device, in which FIG. 22A is a circuit configuration diagram, and FIG. 22B is an operation waveform diagram.
[Explanation of symbols]
1 Single-phase AC power supply
1A Single phase AC power supply for high voltage
1B Single phase AC power supply for low voltage
1C First single-phase AC power supply
1D second single-phase AC power supply
2 Block diode
2A First block diode
2B Second block diode
2R R-phase block diode
2S S-phase block diode
2T T-phase block diode
3 First contact
3A First contact on the order side
3B Opposite phase first contact
3R R-phase first contact
3 S phase first contact
3T T-phase first contact
3RH 1st contact for high voltage side R phase
3SH High voltage side S phase first contact
4 Second contact
4A Second contact on the order side
4B Opposite phase second contact
4R Second contact for R phase
4S Second contact for S phase
4T Second contact for T phase
4M 2nd contact for single phase
4RL 2nd contact for low voltage side R phase
4SL Low voltage side S phase second contact
5 brake coil
6 Freewheel diode
7 Single-phase rectifier circuit
8 Voltage divider resistor
8A voltage divider
8B Anti-phase side voltage dividing resistor
8R R-phase voltage dividing resistor
8S S-phase voltage dividing resistor
8T T-phase voltage dividing resistor
8M single phase voltage divider
8RL Low-voltage side R-phase voltage dividing resistor
8SL Low voltage side S-phase voltage dividing resistor
8TL Voltage dividing resistor for low voltage side T-phase
9 Three-phase AC power supply
10 Neutral points
11T Third contact for T phase
12 3-phase AC power supply
12A High-voltage three-phase AC power supply
12B Low-voltage three-phase AC power supply
13 Three-phase rectifier circuit
14 Single-phase rectifier circuit
101 3-phase AC power supply
102 Three-phase rectifier circuit
103 1st contact
104 Second contact
105 brake coil
106 voltage divider

Claims (25)

When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A single-phase AC power supply as the AC power supply unit,
A block diode for performing the rectification, and a series connection body including first and second contacts as the contact member;
A voltage dividing resistor connected in parallel to the second contact;
A freewheel diode connected in parallel to the brake coil;
With
One end of the brake coil is connected through the series connection body, and the other end is directly connected to one end and the other end of the single-phase AC power supply,
During the forcible excitation period, both the first and second contacts are turned on, and during the holding period, only the first contact is turned on.
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A high-voltage single-phase AC power supply and a low-voltage single-phase AC power supply connected in series with each other as the AC power supply unit;
A first series connection body including a first contact as the contact member and a first block diode for performing the rectification;
A second series connection body including a second contact as the contact member and a second block diode that performs the rectification;
A freewheel diode connected in parallel to the brake coil;
With
One end of the brake coil is connected to one end of the high-voltage single-phase AC power supply and one end of the low-voltage single-phase AC power supply via the first and second series-connected bodies, respectively. Is connected to a common connection point of the high-voltage single-phase AC power supply and the low-voltage single-phase AC power supply,
During the forcible excitation period, only the first contact is turned on, and during the holding period, only the second contact is turned on.
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A single-phase AC power supply as the AC power supply unit,
A diode D1, D3 forming an upper arm and diodes D2, D4 forming a lower arm are bridge-connected, and a single-phase rectifier circuit for performing the rectification;
A first contact as the contact member, connected between one end of the single-phase AC power supply and a common connection point of the diodes D1 and D2;
A second contact as the contact member, connected between the other end of the single-phase AC power supply and a common connection point of the diodes D3 and D4;
An anode is connected to an anode-side common connection point of the diodes D2 and D4, and a cathode is connected between the other end of the single-phase AC power supply and the second contact, and the second contact is turned off. A block diode that performs the rectification when in a state,
With
One end of the brake coil is connected to a cathode-side common connection point of the diodes D1 and D3, and the other end is connected to an anode-side common connection point of the diodes D2 and D4.
During the forcible excitation period, both the first and second contacts are turned on, and during the holding period, only the first contact is turned on.
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
First and second single-phase AC power supplies connected in series with each other and having opposite phases to each other as the AC power supply unit;
A first series connection body including a first contact as the contact member and a first block diode for performing the rectification;
A second series connection body including a second contact as the contact member and a second block diode that performs the rectification;
A freewheel diode connected in parallel to the brake coil;
With
One end of the brake coil is connected to one end of the first and second single-phase AC power supplies via the first and second series-connected bodies, respectively, and the other end is connected to the first and second single-phase AC power supplies. Connected to the common connection point of the two single-phase AC power supplies,
During the forcible excitation period, both the first and second contacts are turned on, and during the holding period, only the first contact is turned on.
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A single-phase AC power supply as the AC power supply unit,
A diode D1, D3 forming an upper arm and diodes D2, D4 forming a lower arm are bridge-connected, and a single-phase rectifier circuit for performing the rectification;
A first contact as the contact member, connected between one end of the single-phase AC power supply and a common connection point of the diodes D1 and D2;
A second contact as the contact member, connected between the other end of the single-phase AC power supply and a common connection point of the diodes D3 and D4;
A voltage dividing resistor connected in parallel to the second contact;
With
One end of the brake coil is connected to a cathode-side common connection point of the diodes D1 and D3, and the other end is connected to an anode-side common connection point of the diodes D2 and D4.
During the forcible excitation period, both the first and second contacts are turned on, and during the holding period, only the first contact is turned on.
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A high-voltage single-phase AC power supply and a low-voltage single-phase AC power supply connected in series with each other as the AC power supply unit;
A diode D1, D3 forming an upper arm and diodes D2, D4 forming a lower arm are bridge-connected, and a single-phase rectifier circuit for performing the rectification;
A first contact as the contact member, connected between one end of the high-voltage single-phase AC power supply and a common connection point of the diodes D1 and D2;
A second contact as the contact member, connected between one end of the low-voltage single-phase AC power supply and a common connection point of the diodes D1 and D2;
With
One end of the brake coil is connected to a cathode-side common connection point of the diodes D1 and D3, and the other end is connected to an anode-side common connection point of the diodes D2 and D4. Connect the connection point to the common connection point of the high-voltage single-phase AC power supply and the low-voltage single-phase AC power supply,
During the forcible excitation period, only the first contact is turned on, and during the holding period, only the second contact is turned on.
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
First and second single-phase AC power supplies connected in series with each other and having opposite phases to each other as the AC power supply unit;
A first series connection body including first and second contacts on the order phase side as the contact member, and a first block diode that performs the rectification;
Anti-phase side first and second contacts as the contact member, and a second series-connected body including a second block diode that performs the rectification;
A voltage divider resistor on the order phase side and the opposite phase side connected in parallel to the second contact on the order phase side and the opposite phase side, respectively;
With
One end of the brake coil is connected to one end of the first and second single-phase AC power supplies via the first and second series-connected bodies, respectively, and the other end is connected to the first and second single-phase AC power supplies. Connected to the common connection point of the two single-phase AC power supplies,
During the forcible excitation period, all of the first and second contacts on the order phase side and the opposite phase side are turned on, and only the first contact on the order phase side and the opposite phase side are turned on during the holding period. State
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A three-phase AC power source having the R, S, and T phases and a neutral point, serving as the AC power supply unit;
R-phase first and second contacts as the contact member, and an R-phase series connection body including an R-phase block diode for performing the rectification;
An S-phase first and second contact as the contact member, and an S-phase series connection body including an S-phase block diode for performing the rectification;
T-phase first and second contacts as the contact member, and a T-phase series connection body including a T-phase block diode for performing the rectification;
R-phase, S-phase, and T-phase voltage-dividing resistors connected in parallel to the R-phase, S-phase, and T-phase second contacts;
With
The cathodes of the R-phase, S-phase, and T-phase block diodes are commonly connected, one end of the brake coil is connected to this common connection point, and the other end is connected to the three-phase AC power supply. Connected to the
During the forcible excitation period, all of the first and second contacts for the R, S, and T phases are turned on, and during the holding period, for the R, S, and T phases. Turn on only the first contact of
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A three-phase AC power source having the R, S, and T phases and a neutral point, serving as the AC power supply unit;
An R-phase first contact as the contact member, and an R-phase series connection body including an R-phase block diode for performing the rectification;
A first contact for the S phase as the contact member, and a series connection for the S phase comprising an S phase block diode for performing the rectification;
A second contact for the T phase as the contact member, and a series connection for the T phase including a block diode for the T phase for performing the rectification;
A freewheel diode connected in parallel to the brake coil;
With
The cathodes of the R-phase, S-phase, and T-phase block diodes are commonly connected, one end of the brake coil is connected to this common connection point, and the other end is connected to the three-phase AC power supply. Connected to the
During the forcible excitation period, all of the first contacts for the R and S phases and the second contact for the T phase are all turned on. During the holding period, the second contacts for the T phase are turned on. Only the on state,
An elevator brake control device, characterized in that: The elevator brake control device according to claim 9,
During the holding period, only the first contact for the R phase and the first contact for the S phase are turned on during the holding period, instead of turning on only the second contact for the T phase.
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A three-phase AC power source having the R, S, and T phases and a neutral point, serving as the AC power supply unit;
A first contact for R-phase as the contact member, a voltage-dividing resistor for R-phase, and a series connection for R-phase comprising an R-phase block diode for performing the rectification;
A first contact for S-phase as the contact member, a voltage-dividing resistor for S-phase, and a series connection for S-phase comprising an S-phase block diode for performing the rectification;
A second contact for the T phase as the contact member, a voltage dividing resistor for the T phase, and a series connection for the T phase including a block diode for the T phase for performing the rectification;
A third contact for a T-phase, which is connected in parallel to the voltage-dividing resistor for the T-phase and performs a b-contact operation on each of the first contacts for the R-phase and the S-phase;
A freewheel diode connected in parallel to the brake coil;
With
The cathodes of the R-phase, S-phase, and T-phase block diodes are commonly connected, one end of the brake coil is connected to this common connection point, and the other end is connected to the three-phase AC power supply. Connected to the
During the forcible excitation period, the first contacts for the R phase and the S phase and the second contact for the T phase are turned on, and only the second contact for the T phase is turned on during the holding period. Turn on,
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A three-phase AC power source having the R, S, and T phases and a neutral point, serving as the AC power supply unit;
R-phase first and second contacts as the contact member, and an R-phase series connection body including an R-phase block diode for performing the rectification;
An S-phase first and second contact as the contact member, and an S-phase series connection body including an S-phase block diode for performing the rectification;
T-phase first and second contacts as the contact member, and a T-phase series connection body including a T-phase block diode for performing the rectification;
R-phase and S-phase voltage dividing resistors connected in parallel to the R-phase and S-phase second contacts;
A freewheel diode connected in parallel to the brake coil;
With
The cathodes of the R-phase, S-phase, and T-phase block diodes are commonly connected, one end of the brake coil is connected to this common connection point, and the other end is connected to the three-phase AC power supply. Connected to the
During the forcible excitation period, all of the first and second contacts for the R phase, S phase, and T phase are turned on, and during the holding period, the first contacts for the R phase and the S phase are turned on. Turn ON only the contacts,
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A three-phase AC power source having the R, S, and T phases and a neutral point, serving as the AC power supply unit;
R-phase first and second contacts as the contact member, and an R-phase series connection body including an R-phase block diode for performing the rectification;
A first contact for the S phase as the contact member, and a series connection for the S phase comprising an S phase block diode for performing the rectification;
A freewheel diode connected in parallel to the brake coil;
With
The cathodes of the R-phase and S-phase block diodes are commonly connected, one end of the brake coil is connected to this common connection point, and the other end is connected to the neutral point of the three-phase AC power supply. Further, the terminal on the T-phase load side of the three-phase AC power supply is opened,
During the forcible excitation period, all of the R-phase and S-phase first contacts and the R-phase second contact are turned on, and during the holding period, the R-phase and S-phase Only the first contact is turned on,
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A three-phase AC power source having the R, S, and T phases and a neutral point, serving as the AC power supply unit;
R-phase first and second contacts as the contact member, and an R-phase series connection body including an R-phase block diode for performing the rectification;
An S-phase first and second contact as the contact member, and an S-phase series connection body including an S-phase block diode for performing the rectification;
An S-phase voltage dividing resistor connected in parallel to the S-phase second contact;
A freewheel diode connected in parallel to the brake coil;
With
The cathodes of the R-phase and S-phase block diodes are commonly connected, one end of the brake coil is connected to this common connection point, and the other end is connected to the neutral point of the three-phase AC power supply. Further, the terminal on the T-phase load side of the three-phase AC power supply is opened,
During the forcible excitation period, all the first and second contacts for the R phase and the S phase are turned on, and only the first contacts for the R phase and the S phase are turned on during the holding period. State
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A three-phase AC power supply and a single-phase AC power supply as the AC power supply unit,
A three-phase rectifier circuit configured by bridge-connecting diodes D1, D3, and D5 forming an upper arm and diodes D2, D4, and D6 forming a lower arm, and performing the rectification;
A first contact for the R phase as the contact member, connected between the R phase side of the three-phase AC power supply and a common connection point of the diodes D1 and D2;
A first contact for the S phase as the contact member, connected between the S phase side of the three-phase AC power supply and a common connection point of the diodes D3 and D4;
A single-phase second contact as the contact member, connected between one end of the single-phase AC power supply and a common connection point of the diodes D1 and D2;
With
One end of the brake coil is connected to a cathode-side common connection point of the diodes D1, D3, and D5, and the other end is connected to an anode-side common connection point of the diodes D2, D4, and D6. Connecting the T-phase side of the phase AC power supply and the other end of the single phase AC power supply to a common connection point of the diodes D5 and D6;
During the forced excitation period, only the R-phase and S-phase first contacts are turned on, and during the holding period, only the single-phase second contact is turned on.
An elevator brake control device, characterized in that: The elevator brake control device according to claim 15,
A single-phase voltage dividing resistor is interposed between the single-phase second contact and the diodes D1 and D2;
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A three-phase AC power supply and a single-phase AC power supply as the AC power supply unit,
A three-phase rectifier circuit configured by bridge-connecting diodes D1, D3, and D5 forming an upper arm and diodes D2, D4, and D6 forming a lower arm, and performing the rectification;
A diode series connection body formed by diodes D7 and D8 connected in series and connected in parallel to the three-phase rectifier circuit;
A first contact for the R phase as the contact member, connected between the R phase side of the three-phase AC power supply and a common connection point of the diodes D1 and D2;
A first contact for the S phase as the contact member, connected between the S phase side of the three-phase AC power supply and a common connection point of the diodes D3 and D4;
A single-phase second contact as the contact member, connected between one end of the single-phase AC power supply and a common connection point of the diodes D7 and D8;
With
One end of the brake coil is connected to a cathode-side common connection point of the diodes D1, D3, D5, and D7, and the other end is connected to an anode-side common connection point of the diodes D2, D4, D6, and D8. Further, the T-phase side of the three-phase AC power supply and the other end of the single-phase AC power supply are connected to a common connection point of the diodes D5 and D6,
At least the R-phase and S-phase first contacts are turned on during the forced excitation period, and only the single-phase second contact is turned on during the holding period.
An elevator brake control device, characterized in that: The elevator brake control device according to claim 17,
A single-phase voltage dividing resistor is interposed between the single-phase second contact and the diodes D7 and D8;
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A three-phase AC power supply as the AC power supply unit;
A three-phase rectifier circuit configured by bridge-connecting diodes D1, D3, and D5 forming an upper arm and diodes D2, D4, and D6 forming a lower arm, and performing the rectification;
A first contact for the R phase as the contact member, connected between the R phase side of the three-phase AC power supply and a common connection point of the diodes D1 and D2;
A second contact for the T phase as the contact member, which is connected between the T phase side of the three-phase AC power supply and a common connection point of the diodes D5 and D6;
With
One end of the brake coil is connected to a cathode common connection point of the diodes D1, D3, and D5, and the other end is connected to an anode common connection point of the diodes D2, D4, and D6. Connecting the S-phase side of the phase AC power supply to a common connection point of the diodes D3 and D4,
During the forced excitation period, both the R-phase first contact and the T-phase second contact are turned on, and during the holding period, only the R-phase first contact is turned on.
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A three-phase AC power supply as the AC power supply unit;
A three-phase rectifier circuit configured by bridge-connecting diodes D1, D3, and D5 forming an upper arm and diodes D2, D4, and D6 forming a lower arm, and performing the rectification;
An R-phase second contact as the contact member, connected between the R-phase side of the three-phase AC power supply and a common connection point of the diodes D1 and D2;
A second contact for the S phase as the contact member, connected between the S phase side of the three-phase AC power supply and a common connection point of the diodes D3 and D4;
A first contact for the T phase as the contact member, connected between the T phase side of the three-phase AC power supply and a common connection point of the diodes D5 and D6;
An R-phase voltage dividing resistor connected in parallel to the R-phase second contact;
With
One end of the brake coil is connected to a cathode common connection point of the diodes D1, D3, and D5, and the other end is connected to an anode common connection point of the diodes D2, D4, and D6. Connecting the S-phase side of the phase AC power supply to a common connection point of the diodes D3 and D4,
During the forcible excitation period, all of the R-phase and S-phase second contacts and the T-phase first contact are turned on, and only the T-phase first contact is turned on during the holding period. State
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A three-phase AC power supply as the AC power supply unit;
A three-phase rectifier circuit configured by bridge-connecting diodes D1, D3, and D5 forming an upper arm and diodes D2, D4, and D6 forming a lower arm, and performing the rectification;
One end is connected to the R-phase side of the three-phase AC power supply, and the other end is connected to a common connection point of the diodes D1 and D2, and the R-phase first and second contacts as the contact members are connected in series. An R-phase series connected body,
One end is connected to the S-phase side of the three-phase AC power source, and the other end is connected to a common connection point of the diodes D3 and D4, and the S-phase first and second contacts as the contact members are connected in series. A series-connected body for S phase,
One end is connected to the T-phase side of the three-phase AC power supply, and the other end is connected to a common connection point of the diodes D5 and D6, and the first and second contacts for the T-phase as the contact members are connected in series. A series-connected body for T-phase,
R-phase, S-phase, and T-phase voltage-dividing resistors connected in parallel to the R-phase, S-phase, and T-phase second contacts;
With
One end of the brake coil is connected to a cathode-side common connection point of the diodes D1, D3, D5, and the other end is connected to an anode-side common connection point of the diodes D2, D4, D6,
During the forcible excitation period, all of the first and second contacts for the R, S, and T phases are turned on, and during the holding period, for the R, S, and T phases. Turn on only the first contact of
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A high-voltage three-phase AC power supply and a low-voltage three-phase AC power supply as the AC power supply unit are connected to diodes D1, D3, and D5 forming the upper arm and diodes D2, D4, and D6 forming the lower arm in a bridge connection. A three-phase rectifier circuit for performing the rectification,
A first contact for a high-voltage R-phase as the contact member, connected between the R-phase side of the high-voltage three-phase AC power supply and a common connection point of the diodes D1 and D2;
A first contact for a high-voltage side S-phase as the contact member, connected between the S-phase side of the high-voltage three-phase AC power supply and a common connection point of the diodes D3 and D4;
A second contact for the low-voltage R-phase as the contact member, connected between the R-phase side of the low-voltage three-phase AC power supply and a common connection point of the diodes D1 and D2;
A second contact for the low-voltage S-phase as the contact member, connected between the S-phase of the low-voltage three-phase AC power supply and a common connection point of the diodes D3 and D4;
With
One end of the brake coil is connected to a cathode-side common connection point of the diodes D1, D3, and D5, and the other end is connected to an anode-side common connection point of the diodes D2, D4, and D6. Connecting the T-phase side of the voltage-side three-phase AC power supply and the low-voltage-side three-phase AC power supply to a common connection point of the diodes D5 and D6;
During the forced excitation period, only the high voltage side R-phase first contact and the high voltage side S-phase first contact are turned on, and during the holding period, the low voltage side R-phase second contact is turned on. And only the second contact for the low voltage side S phase is turned on,
An elevator brake control device, characterized in that: The elevator brake control device according to claim 22,
A low-voltage-side R-phase voltage dividing resistor interposed between the low-voltage-side R-phase second contact and a common connection point of the diodes D1 and D2;
A low-voltage-side S-phase voltage dividing resistor interposed between the low-voltage-side S-phase second contact and a common connection point of the diodes D3 and D4;
A low-voltage side T-phase voltage dividing resistor inserted between the T-phase of the low-voltage side three-phase AC power supply and a common connection point of the diodes D5 and D6;
With
An elevator brake control device, characterized in that: When performing the brake release operation by rectifying the AC voltage from the AC power supply unit and applying the rectified voltage to the brake coil via the contact member, the applied voltage during the forced excitation period is set to a high voltage, and during the subsequent holding period In the elevator brake control device that the applied voltage of the low voltage by the on-off operation of the contact member,
A high-voltage three-phase AC power supply and a low-voltage three-phase AC power supply as the AC power supply unit are connected to diodes D1, D3, and D5 forming the upper arm and diodes D2, D4, and D6 forming the lower arm in a bridge connection. A three-phase rectifier circuit for performing the rectification,
A diode D7, D9 forming an upper arm and diodes D8, D10 forming a lower arm are bridge-connected, and a single-phase rectifier circuit for performing the rectification;
A first contact for a high-voltage R-phase as the contact member, connected between the R-phase side of the high-voltage three-phase AC power supply and a common connection point of the diodes D1 and D2;
A first contact for a high-voltage side S-phase as the contact member, connected between the S-phase side of the high-voltage three-phase AC power supply and a common connection point of the diodes D3 and D4;
A second contact for the low-voltage R-phase as the contact member, connected between the R-phase of the low-voltage three-phase AC power supply and a common connection point of the diodes D9 and D10;
A second contact for the low-voltage side S-phase as the contact member, connected between the S-phase side of the low-voltage three-phase AC power supply and a common connection point of the diodes D7 and D8;
With
One end of the brake coil is connected to a cathode-side common connection point of the diodes D1, D3, D5, D7, D9, and the other end is connected to an anode-side common connection point of the diodes D2, D4, D6, D8, D10. And the T-phase side of the high-voltage three-phase AC power supply and the low-voltage three-phase AC power supply is connected to a common connection point of the diodes D5 and D6.
During the forced excitation period, the first contact for the high-voltage side R-phase and the first contact for the high-voltage side S-phase, and the second contact for the low-voltage side R-phase and the second contact for the low-voltage side S-phase. Are turned on, and during the holding period, only the low voltage side R-phase second contact and the low voltage side S-phase second contact are turned on.
An elevator brake control device, characterized in that: The elevator brake control device according to claim 24,
A low-voltage R-phase voltage dividing resistor inserted between the low-voltage R-phase second contact and a common connection point of the diodes D9 and D10;
A low-voltage-side S-phase voltage dividing resistor interposed between the low-voltage-side S-phase second contact and a common connection point of the diodes D7 and D8;
A low-voltage side T-phase voltage dividing resistor inserted between the T-phase of the low-voltage side three-phase AC power supply and a common connection point of the diodes D5 and D6;
With
An elevator brake control device, characterized in that:

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