CN107840219B - Band-type brake coil control circuit and method, band-type brake control power supply equipment and elevator - Google Patents
Band-type brake coil control circuit and method, band-type brake control power supply equipment and elevator Download PDFInfo
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- CN107840219B CN107840219B CN201711167242.XA CN201711167242A CN107840219B CN 107840219 B CN107840219 B CN 107840219B CN 201711167242 A CN201711167242 A CN 201711167242A CN 107840219 B CN107840219 B CN 107840219B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000001514 detection method Methods 0.000 claims abstract description 89
- 230000008878 coupling Effects 0.000 claims abstract description 24
- 238000010168 coupling process Methods 0.000 claims abstract description 24
- 238000005859 coupling reaction Methods 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 150000001875 compounds Chemical class 0.000 claims description 4
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- 238000010586 diagram Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 5
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- 238000012544 monitoring process Methods 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Elevator Control (AREA)
Abstract
The invention discloses a band-type brake coil control circuit which comprises a control unit, an auxiliary power supply, a first switch, an output detection unit and a signal coupling unit. The control unit is respectively connected with the auxiliary power supply, the first switch, the output detection unit and the signal coupling unit. The first switch is connected with an auxiliary power supply and a total power supply for supplying power to the band-type brake coil. The invention also provides a band-type brake coil control method, band-type brake control power supply equipment with the band-type brake coil control circuit and an elevator applying the band-type brake control power supply equipment. The band-type brake coil control circuit is used for realizing the turn-off control of the band-type brake coil, is high in automatic control efficiency, safe and reliable, simple in circuit structure and low in noise, and solves the problem of low turn-off control efficiency of the traditional band-type brake coil. The band-type brake control power supply device has the advantages of simplified structure and small volume. The elevator using the band-type brake control power supply equipment has the advantages of more stable and reliable operation process, more timely braking and low noise.
Description
Technical Field
The invention relates to the technical field of elevators, in particular to a band-type brake coil control circuit and method, band-type brake control power supply equipment and an elevator.
Background
Safety control is a critical aspect of special equipment of the vertical lift type, such as elevators or lifts. For elevator or goods elevator equipment, generally, a traction brake in an electromagnetic band-type brake mode is adopted, safety braking is carried out through the traction brake, abnormal displacement is prevented when an elevator car of the elevator or goods elevator is in a static state or a power motor is in a power failure state, and operation safety of the elevator or goods elevator is guaranteed. The traction braking coil of the traction brake is also called as a band-type brake coil, and the control of running and turning off is realized by a matched band-type brake control power supply, so that the car of the elevator or goods elevator equipment is braked safely. The traditional band-type brake control power supply generally realizes forced turn-off of the band-type brake coil through an external high-power safety contact serial chain, however, the control efficiency of the band-type brake control power supply equipment to the band-type brake coil is low.
Disclosure of Invention
Based on the above analysis, it is necessary to provide a band-type brake coil control circuit, a band-type brake coil control method, a band-type brake control power supply device and an elevator aiming at the problem that the control efficiency of the conventional band-type brake control power supply device on the band-type brake coil is low.
The control unit is respectively connected with the auxiliary power supply, the first switch, the output detection unit and the signal coupling unit, the first switch is connected with the auxiliary power supply and a total power supply for supplying power to the band-type brake coil, a power conversion unit and an output rectifying unit of band-type brake control power supply equipment are connected between the output detection unit and the first switch, the output detection unit is connected with the band-type brake coil in series, and the signal coupling unit is connected with a band-type brake signal unit for outputting an external control signal to the band-type brake coil;
The auxiliary power supply is used for adaptively supplying power to the control unit, the output detection unit is used for detecting an output electric signal of the rectification output unit, and the signal coupling unit is used for carrying out signal coupling on an external control signal output by the band-type brake signal unit and inputting the external control signal into the control unit; and when the control unit detects that the external control signal output by the band-type brake signal unit is invalid and/or the output detection unit detects a preset fault, the control unit controls the first switch to turn off the power supply of the total power supply to the band-type brake coil.
A band-type brake coil control method of the band-type brake coil control circuit comprises the following steps:
If the external control signal output by the band-type brake signal unit is effective and the output detection unit does not detect the preset fault, controlling the first switch to be turned on; when the first switch is turned on, the band-type brake coil is connected with a main power supply and starts to operate;
when the first switch is in a conducting state, if an external control signal output by the band-type brake signal unit is invalid and/or the output detection unit detects a preset fault, the first switch is controlled to be turned off; when the first switch is disconnected, the band-type brake coil is powered off to stop running.
A band-type brake coil control device comprising:
the conduction control module is used for controlling the first switch to be conducted if the external control signal output by the band-type brake signal unit is effective and the output detection unit does not detect the preset fault; when the first switch is turned on, the band-type brake coil is connected with a main power supply and starts to operate;
the turn-off control module is used for controlling the first switch to be turned off when the external control signal output by the band-type brake signal unit is effective and the output detection unit detects a preset fault under the on state of the first switch; when the first switch is disconnected, the band-type brake coil is powered off to stop running.
A band-type brake control power supply device comprises a power conversion unit, an output rectifying unit and a band-type brake coil control circuit.
An elevator comprises a lift car, a band-type brake coil and the band-type brake control power supply equipment.
According to the band-type brake coil control circuit and the band-type brake coil control method, corresponding faults, signal validity judgment and corresponding control are carried out through the control unit, the turn-off control of the band-type brake coil is effectively achieved, an external high-power safety contact serial chain is not required to be used for forced turn-off, the automatic control efficiency is higher, safety and reliability are achieved, the circuit structure is simple, noise in the control process is low, and the problem that the turn-off control efficiency of a traditional band-type brake coil is low is solved. The band-type brake control power supply equipment with the internal band-type brake coil control circuit has the advantages of simplified structure, small volume, timely and reliable turn-off control of the band-type brake coil, low noise in the control process and high control efficiency. The elevator applying the band-type brake control power supply is safer in operation, more stable and safe in braking and low in noise.
Drawings
FIG. 1 is a schematic diagram of a band-type brake coil control circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a band-type brake coil control circuit according to another embodiment of the present invention;
FIG. 3 is a flow chart illustrating a brake coil control according to one embodiment of the present invention;
FIG. 4 is a flow chart of a brake coil control according to another embodiment of the present invention;
FIG. 5 is a timing diagram of a band brake coil control according to one embodiment of the present invention;
FIG. 6 is a block diagram of a band brake coil control device according to one embodiment of the present invention;
FIG. 7 is a schematic diagram of a band-type brake control power supply device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of band-type brake control power supply equipment according to another embodiment of the present invention.
Detailed Description
The following describes the specific embodiments of the band-type brake coil control circuit, the band-type brake coil control method, the band-type brake control power supply device and the elevator in detail with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In the running process of the elevator, a traction brake of an electromagnetic band-type brake mode is generally adopted to brake the car of the elevator, and the basic principle is that when a power motor of the elevator is in power failure, the traction brake is synchronously powered off to stop running, so that brake shoes in the traction brake hold brake wheels coaxially arranged with the power motor of the elevator to brake the power motor, and the elevator car stops moving. Therefore, the abnormal displacement of the lift car can be prevented when the lift car is in a static state or the power motor is in a power failure state by braking of the traction brake in an electromagnetic band-type brake mode, and the operation safety of the lift is ensured. The electromagnetic band-type traction brake comprises a traction braking coil, namely a band-type brake coil, and in practical application, the band-type brake coil is usually required to be controlled by band-type brake control power supply equipment. The traditional band-type brake control power supply equipment generally relies on an external high-power safety contact serial chain to forcibly turn off a band-type brake coil, so that the band-type brake coil stops running to brake a power motor of an elevator.
Referring to fig. 1, an embodiment of the present invention provides a band-type brake coil control circuit 100 for controlling operation of a band-type brake coil, which includes a control unit 12, an auxiliary power supply 14, a first switch 16, an output detection unit 18, and a signal coupling unit 20. The control unit 12 is connected to the auxiliary power supply 14, the first switch 16, the output detection unit 18, and the signal coupling unit 20, respectively. First switch 16 connects auxiliary power source 14 to a main power source 30 that powers band-type brake coil 50. A power conversion unit 202 and an output rectifying unit 204 of the band-type brake control power supply device 200 are connected between the output detection unit 18 and the first switch 16. Output detection unit 18 and a band-type brake coil 50 connected in series. The signal coupling unit 20 is connected to a band-type brake signal unit 40 that outputs an external control signal to the band-type brake coil 50.
The auxiliary power supply 14 is used for adapting the power supply to the control unit 12. The output detection unit 18 is configured to detect an output electrical signal from the output rectifying unit 204. The signal coupling unit 20 is used for signal coupling the external control signal output by the band-type brake signal unit 40 and inputting the external control signal into the control unit 12. When the control unit 12 detects that the external control signal output by the band-type brake signal unit 40 is invalid and/or the output detection unit 18 detects a preset fault, the first switch 16 is controlled to cut off the power supply of the total power supply 30 to the band-type brake coil 50.
It will be appreciated that band-type brake control power supply apparatus 200 is generally disposed between the main power supply 30 and band-type brake coil 50; in addition, in the operation control process of the elevator, an external control signal is generally input to the band-type brake control power supply device 200 through the band-type brake signal unit 40, for example, when a passenger presses a target floor button which needs to be reached while riding the elevator, the band-type brake signal unit 40 synchronously inputs an external control signal to the band-type brake control power supply device 200, the external control signal can trigger the elevator to operate and trigger the band-type brake coil 50 to enter an operation state, and the external control signal can be, for example, when the passenger presses a control button of the elevator, the elevator control mechanism enables the band-type brake signal unit 40 to synchronously and correspondingly generate the control signal so as to enable the band-type brake coil 50 to operate synchronously with the elevator. The internal of the band-type brake control power supply device 200 may generally include a power conversion unit 202 for performing power conversion on the direct current in the circuit and an output rectification unit 204 for rectifying and outputting the current, so as to ensure that the total power supply 30 supplies power to the band-type brake coil 50 normally through the band-type brake control power supply device 200.
The output electric signal detection by the output detection unit 18 may be current detection or voltage detection. The predetermined fault may be an output current overcurrent fault or an output current undercurrent fault of the output rectifying unit 204, an output voltage overvoltage fault or an output voltage undervoltage fault of the output rectifying unit 204, or a short circuit fault or an insulation fault caused by aging of circuit elements, lines or welding spots in each node of the circuit.
Specifically, in the band-type brake coil control circuit 100 according to the above embodiment of the present invention, the auxiliary power supply 14 may be a general auxiliary power supply for controlling power supply in a process, or may be a power adapter with an adaptive output function and a logic output function. The auxiliary power supply 14 is connected in parallel to the output end of the total power supply 30, and performs adaptive independent power supply on the control unit 12 through adaptive conversion of voltage or current so as to meet the control logic requirement of the control unit 12. The control unit 12 may be an MCU chip (single chip microcomputer) or a DSP chip (digital signal processor), so that when the control unit 12 operates normally under an adapted working voltage or working current, the output detection unit 18 may detect the output current of the output rectifying unit 204 by using an overcurrent or undercurrent to obtain status information about whether the output current of the output rectifying unit 204 is normal. Meanwhile, the control unit 12 may determine that the external control signal is valid or invalid by the external control signal coupled from the band-type brake signal unit 40 by the signal coupling unit 20, so that when detecting that the external control signal output by the band-type brake signal unit 40 is invalid, the control unit 12 may control the first switch 16 to be turned off, so as to turn off the power supply of the total power supply 30 to the band-type brake coil 50.
The control unit 12 may also control the first switch 16 to be turned off when detecting that the external control signal output by the band-type brake signal unit 40 is invalid and the output detecting unit 18 detects that the output current of the output rectifying unit 204 has an overcurrent fault, so as to turn off the power supply of the total power supply 30 to the band-type brake coil 50. The control unit 12 may also control the first switch 16 to be turned off when the output detection unit 18 detects that the output rectifying unit 204 outputs current with an overcurrent fault, so as to turn off the power supplied by the main power supply 30 to the band-type brake coil 50.
In the band-type brake coil control circuit 100 in the above embodiment, the control unit 12 controls the first switch to be turned off when detecting that the external control signal output by the band-type brake signal unit 40 is invalid and/or when detecting a predetermined fault by the output detection unit 18 under the condition that the auxiliary power supply 14 is independently adapted to supply power to ensure a normal working state, so as to realize the turn-off control of the band-type brake coil 50. Therefore, the external high-power safety contact serial chain is not needed to be relied on to forcibly turn off the band-type brake coil 50, the automatic control efficiency is higher, the safety and the reliability are high, the circuit is simple in structure, the noise in the control process is low, the problem that the traditional band-type brake coil is low in turn-off control efficiency is solved, and the effect of high control efficiency is achieved.
In one embodiment, the auxiliary power supply 14 may also be a voltage or current converter, as long as an independent power supply adapted to the control unit 12 is enabled.
In another embodiment, the first switch 16 may be a triode, a MOS transistor, or a relay. For example, when the first switch 16 is a MOS transistor, the control unit 12 may control the gate voltage of the first switch 16 to turn off or turn on the first switch 16. First switch 16 may also be a thyristor, a compound switch, or other device with a switching function, so long as it is capable of turning off power supplied from main power supply 30 to band-type brake coil 50 under control of control unit 12.
In another embodiment, the output detection unit 18 may be a current monitoring meter or a voltage monitoring meter. When the output detecting unit 18 is, for example, a current detecting instrument, the output rectifying unit 204 is monitored to output a current overcurrent, and an overcurrent fault signal is fed back to the control unit 12, so that the control unit 12 can timely control the first switch 16 to be turned off. The output detecting unit 18 may be any other electric signal detecting device as long as it can detect the electric signal output from the output rectifying unit 204 to feed back whether or not there is a predetermined failure to the control unit 12.
In another embodiment, the signal coupling unit 20 may be one or more parallel photoelectric couplers, so that the signal coupling unit 20 is connected between the control unit 12 and the band-type brake signal unit 40, and when the band-type brake signal unit 40 outputs an external control signal, the signal coupling unit 20 may obtain the redundant external control signal by using the coupling effect through the redundant signal path formed by the photoelectric couplers, and input the redundant external control signal to the control unit 12, so that the control unit 12 may determine the validity of the external control signal. For example, when the external control signal is not acquired, the control unit 12 may determine that the external control signal is not valid. For another example, the control unit 12 may determine that the external control signal is valid when the external control signal is stably acquired. The control unit 12 may also determine the validity of the external control signal by determining the strength of the external control signal. Thus, through the signal coupling unit 20, the band-type brake coil control circuit 100 can judge the validity of the external control signal output by the band-type brake signal unit 40 when the elevator operates, so that the on-off of the band-type brake coil 50 can be controlled according to the external control signal, and the control efficiency is improved.
In one embodiment, the signal coupling unit 20 also has a signal isolation function, so that the electric signals between the band-type brake signal unit 40 and the driving unit of the band-type brake control power supply device 200 can be isolated, and crosstalk between the signals is prevented, so that the accuracy of judging the effective state of the external control signal by the control unit 12 can be improved.
Referring to fig. 2, an internal contracting brake coil control circuit 100 according to another embodiment of the present invention further includes a second switch 22. The second switch 22 is connected to the control unit 12 and the mains supply 30, respectively. The first switch 16 is connected to the auxiliary power supply 14 via a second switch 22. The control unit 12 controls the second switch 22 to cut off the power supply of the total power supply 30 to the band-type brake coil 50 when the power supply output of the total power supply 30 is abnormal and/or the output detection unit 18 detects a predetermined fault.
Specifically, the control unit 12 may monitor the power output condition of the total power supply 30 through the second switch 22, for example, the second switch 22 may be a triode, and the control unit 12 may monitor whether the magnitude of the current flowing through the second switch 22 exceeds an allowable current value, for example, a maximum input current for operation of the band-type brake power conversion unit 202. If the voltage exceeds the preset threshold, the second switch 22 is controlled to be opened by controlling the grid voltage so as to cut off the power supply of the total power supply source 30 to the band-type brake coil 50. When the output detection unit 18 detects a predetermined fault, for example, when the output rectifying unit 204 outputs an overcurrent fault, the control unit 12 may also control the second switch 22 to be turned off, so as to turn off the power supplied from the main power supply 30 to the band-type brake coil 50. During the operation of the elevator, if the power supply output of the total power supply source 30 is abnormal due to the fluctuation of the external power supply voltage of the elevator and the output detection unit 18 detects an overcurrent fault, the control unit 12 may also control the second switch 22 to be turned off, so as to turn off the power supply of the total power supply source 30 to the band-type brake coil 50.
Through the arrangement of the second switch 22, the control circuit 100 of the band-type brake coil 50 in the embodiment of the invention can timely shut off the power supply of the total power supply 30 to the band-type brake coil 50 when the external total power supply 30 has abnormal power supply output, thereby further improving the reliability of operation control of the band-type brake coil 50 and improving the safety level of elevator operation.
In one embodiment, the second switch 22 may be a triode, a MOS transistor, a relay, a thyristor, a compound switch, or other devices with a switching function, so long as the power supply of the total power supply 30 to the band-type brake coil 50 can be turned off under the control of the control unit 12.
In one embodiment, the number of first switches 16 and second switches 22 may be more than one, respectively. By providing the first switch 16 and the second switch 22 between the respective circuit nodes of the band-type brake control power supply apparatus 200, the power supply of the band-type brake coil 50 by the total power supply 30 can be controlled more accurately and timely.
In another embodiment, band brake coil control circuit 100 may also include an input detection unit 24. The input detection unit 24 is connected to the first switch 16, the second switch 22, the control unit 12, and the rectifying and filtering unit 206 of the band-type brake control power supply apparatus 200, respectively. The input detection unit 24 is configured to detect the output electrical signal of the rectifying and filtering unit 206.
It will be appreciated that the general band-type brake control power supply apparatus 200 may include a rectifying and filtering unit 206, so that the rectifying and filtering unit 206 rectifies and filters the power output of the total power supply 30, so that the rectified direct current is input into the band-type brake control power supply apparatus 200, so that an internal circuit can work under the condition of an adapted working voltage or current and normally supply power to the band-type brake coil 50.
Specifically, the band-type brake coil control circuit 100 may include an input detection unit 24 connected between the second switch 22 and the first switch 16, and the magnitude of the current output by the rectifying and filtering unit 206 of the band-type brake control power supply device 200 may be detected in time through the input detection unit 24. When the input detection unit 24 detects that the rectifying and filtering unit 206 of the band-type brake control power supply device 200 has an output overcurrent fault or an insulation fault, the control unit 12 may control the first switch 16 and the second switch 22 to be turned off sequentially, or may individually control any one of the first switch 16 and the second switch 22 to be turned off, so as to cut off the power supply of the total power supply 30 to the band-type brake coil 50.
Through the above arrangement of the input detection unit 24, the band-type brake coil control circuit 100 can timely control the first switch 16 and/or the second switch 22 to be turned off when the rectifying and filtering unit 206 of the band-type brake control power supply device 200 generates an output overcurrent fault or an insulation fault, so as to shut off the power supply of the total power supply source 30 to the band-type brake coil 50, thus further improving the reliability of the band-type brake coil control circuit 100 in controlling the operation of the band-type brake coil 50 and further improving the safety level of elevator operation.
In one embodiment, the input detection unit 24 may be a current monitoring meter or a voltage monitoring meter. When the input detection unit 24 is, for example, a current detection instrument, and when the rectifying and filtering unit 206 outputs a current overcurrent, an overcurrent fault signal is fed back to the control unit 12, so that the control unit 12 can timely control the second switch 22 and/or the first switch 16 to be turned off. The input detection unit 24 may be another electric signal detection device, as long as it can detect the electric signal output from the rectifying and filtering unit 204 to feed back whether or not there is a predetermined fault to the control unit 12.
Referring to fig. 1 and 3, a band-type brake coil control method is provided, which includes the following steps:
s10, if the external control signal output by the band-type brake signal unit 40 is valid and the output detection unit 18 does not detect the preset fault, the first switch 16 is controlled to be turned on.
The fact that the external control signal output by the band-type brake signal unit 40 is valid may mean that when a passenger needs to take an elevator and presses an elevator taking control button, the band-type brake signal unit 40 inputs the external control signal to the band-type brake control power supply device 200 to trigger the band-type brake coil 50 to start synchronous operation. When the first switch 16 is turned on, the band-type brake coil 50 is turned on to the main power supply 30 and starts to operate.
Specifically, after the total power supply 30 starts to supply power and output, the control unit 12 determines that the external control signal output by the band-type brake signal unit 40 is valid, and if the output detection unit 18 does not detect a predetermined fault, controls the first switch 16 to be turned on, so that the total power supply 30 is turned on, the band-type brake coil 50 starts to perform power running, the braking of the power motor of the elevator is removed, and the elevator enters normal running. It will be appreciated that the output detection unit 18 may perform a circuit self-test to determine the presence or absence of a predetermined fault, such as an open circuit fault. The control unit 12 may also detect the voltage overvoltage or undervoltage of the circuit, and determine whether a predetermined fault exists, and the corresponding predetermined fault may be, for example, an overvoltage or undervoltage fault.
In this way, when an external control signal is input and if there is no predetermined fault inside the circuit, the control unit 12 controls the first switch 16 to switch from the off state to the on state, and turns on the current path from the main power supply 30 to the band-type brake coil 50, so that the band-type brake coil 50 starts to operate. The operation control of the band-type brake coil 50 is safe and quick. The first switch 16 controls the band-type brake coil 50 to start to operate, so that noise is low.
S12, when the external control signal output by the band-type brake signal unit 40 is invalid and/or the output detection unit 18 detects a predetermined fault under the on state of the first switch 16, the first switch 16 is controlled to be turned off.
When the first switch 16 is turned off, the band-type brake coil 50 is powered off to stop running.
Specifically, the control unit 12 continuously detects the state of the internal circuit of the band-type brake control power supply device 200 and the state of the external control signal during the normal operation of the band-type brake coil, so as to monitor the operation of the elevator in the whole course. After first switch 16 is turned on, band-type brake coil 50 is in an operational state. If the external control signal output by the band-type brake signal unit 40 is invalid or the output detection unit 18 detects a predetermined fault, the control unit 12 controls the first switch 16 to be turned off, and the band-type brake coil 50 is powered off and stops running to brake the power motor of the elevator.
If the external control signal output by the band-type brake signal unit 40 is invalid and the output detection unit 18 detects a predetermined fault, the control unit 12 also controls the first switch 16 to be turned off, so that the band-type brake coil 50 is powered off to stop running to brake the power motor of the elevator. So, turn-off the power supply of total power supply 30 to band-type brake coil 50 through the control unit 12 control first switch 16, automatic control's efficiency is higher, safe and reliable, and the simple structure of circuit, control process noise is low moreover to solve traditional band-type brake coil and turn-off the problem that control efficiency is not high, had the effect that control efficiency is high.
Referring to fig. 4 to 5, in another embodiment, for step S10, the following steps may be further included:
S101, if the power output of the total power supply 30 is normal and the output detection unit 18 or the input detection unit 24 does not detect the predetermined fault, the second switch 22 is controlled to delay the first preset time t 1 to be turned on, and the first switch 16 is controlled to delay the second preset time t 2 to be turned on.
In fig. 5, the states of the respective objects are shown in a high-low level manner, for example, the high level of the first switch 16 indicates on, and the corresponding low level indicates off, and the other objects are understood in the same manner. The manner of high and low levels is merely for convenience to indicate that the control unit 12 controls the logic timing of the first switch 16 and the second switch 22 according to the external control signal, the total power supply 30, and the state of the predetermined fault. Rather than limiting the operating level of elements in the circuit such as the first switch 16 or the second switch 22. The second switch 22 may be the same type of switch as the first switch 16, or a different type of switch, and the second switch 22 may be used to perform on-off control of the circuit on the power output side of the total power supply 30. The corresponding first switch 16 may be used to perform on-off control of the circuit on the output side of the output rectifying unit 204. The positions of the first switch 16 and the second switch 22 in the circuit may be reversed, as long as the same function is achieved. The first preset time t 1 and the second preset time t 2 may be control logic times determined by cooperation of the first switch 16 and the second switch 22 in the circuit, and may be used to control the operation logic of each unit in the circuit. The first preset time t 1 is typically selected based on the particular device type or control logic required by the second switch 22. The second preset time t 2 is typically selected based on the particular device type or control logic required by the first switch 16.
Specifically, if the power output of the total power supply 30 is normal, and the output detection unit 18 does not detect that there is a predetermined fault on one side of the output rectification or the input detection unit 24 does not detect that there is a predetermined fault on one side of the power output, the control unit 12 may control the second switch 22 to be turned on after delaying the first preset time t 1, and further control the first switch 16 to be turned on after delaying the second preset time t 2, so that the power supply on process of the band-type brake coil 50 may be controlled step by step after the power input, and the control is safer and more efficient.
Further, in another embodiment, for step S12, the following steps may be specifically included:
and S120, when the external control signal output by the band-type brake signal unit 40 is invalid and/or the output detection unit 18 or the input detection unit 24 detects a preset fault, the first switch 16 is controlled to delay the turning-off of the third preset time t 3, and the second switch 22 is controlled to delay the turning-off of the fourth preset time t 4.
The third preset time t 3 may be generally selected according to the specific device type or control logic selected by the first switch 16. The fourth preset time t 4 may be generally selected according to the specific device type or control logic selected by the second switch 22.
Specifically, when detecting that the external control signal output by the band-type brake signal unit 40 is invalid, the control unit 12 may control the first switch 16 to delay the third preset time t 3 to be turned off, and control the second switch 22 to delay the fourth preset time t 4 to be turned off. The control unit 12 may also control the first switch 16 to delay turning off for a third preset time t 3 and control the second switch 22 to delay turning off for a fourth preset time t 4 when it is determined that the output detection unit 18 or the input detection unit 24 detects a predetermined failure. The control unit 12 may further control the first switch 16 to delay turning off for a third preset time t 3 and control the second switch 22 to delay turning off for a fourth preset time t 4 when detecting that the external control signal output by the band-type brake signal unit 40 is invalid and that the output detection unit 18 or the input detection unit 24 detects a predetermined failure. In this way, the first switch 16 and the second switch 22 can be turned off step by step during the operation of the band-type brake coil 50 as long as the external control signal is invalid or a predetermined fault occurs, so that the power supply of the total power supply 30 to the band-type brake coil 50 is turned off safely and reliably. The process of the off control is stable and reliable and the noise is low.
In another embodiment, after step S12, the method may further include the steps of:
S122, if the external control signal output by the band-type brake signal unit 40 is valid and the output detection unit 18 or the input detection unit 24 does not detect the predetermined fault, the second switch 22 is controlled to delay the conduction of the fifth preset time t 5, and the first switch 16 is controlled to delay the conduction of the second preset time t 2.
The fifth preset time t 5 may also be generally selected according to the specific device type or control logic selected by the second switch 22.
Specifically, after the first switch 16 and the second switch 22 are turned off most recently, if the external control signal output by the band-type brake signal unit 40 is valid and the output detection unit 18 or the input detection unit 24 does not detect the predetermined fault, the control unit 12 controls the second switch 22 to delay the conduction of the fifth preset time t 5, and controls the first switch 16 to delay the conduction of the second preset time t 2. In this way, after the external control signal is valid and the predetermined fault is eliminated, the first switch 16 and the second switch 22 can be automatically recovered to be turned on step by step, so that the band-type brake coil 50 is electrified to operate. The control efficiency of automatic recovery operation is high, and the control process is stable and reliable.
In another embodiment, if the external control signal output by the band-type brake signal unit 40 is valid and the output detection unit 18 or the input detection unit 24 does not detect the predetermined fault in the above embodiment, the step of controlling the second switch 22 to delay the conduction of the fifth preset time t 5 and controlling the first switch 16 to delay the conduction of the second preset time t 2 may further include the steps of:
S124, when the external control signal output by the band-type brake signal unit 40 is invalid in the on state of the first switch 16 and the second switch 22, controlling the first switch 16 to be turned off by delaying a sixth preset time; after the first switch 16 is turned off, if the external control signal output by the band-type brake signal unit 40 is valid and the second switch 22 is in the on state, the first switch 16 is controlled to be turned on for a seventh preset time.
The sixth preset time t 6 may also be generally selected according to the specific device type or control logic of the first switch 16. The seventh preset time t 7 may also be selected according to the specific device type or control logic requirement selected by the first switch 16. The setting of the preset time in the above and the above embodiments is only required to achieve an efficient logical control effect.
Specifically, in the state where the first switch 16 and the second switch 22 are turned on, the external control signal is not valid, for example, when the elevator arrives at the destination floor and needs to stop, and the passenger is released, the external control signal can be converted into a invalid state along with the stop control of the elevator; when the external control signal is invalid, the control unit 12 controls the first switch 16 to delay the turning-off of the sixth preset time, and at the moment, the band-type brake coil 50 is powered off to stop running so as to brake the power motor of the elevator.
And S126, after the first switch 16 is turned off, the control unit 12 determines that the external control signal output by the band-type brake signal unit 40 is valid and the second switch 22 is in a conducting state, that is, when the external control signal is turned into valid again and no predetermined fault occurs, the control unit 12 controls the first switch 16 to delay the conduction of the seventh preset time.
Thus, the automatic turn-off and power-on recovery control of the band-type brake coil 50 in the normal passenger carrying operation process of the elevator can be realized, the control process is reliable and stable, the noise is low, and the elevator taking experience of passengers is improved.
Referring to fig. 6, in one embodiment, a band-type brake coil control device 500 is provided, which includes a turn-on control module 501 and a turn-off control module 502. The conduction control module 501 is configured to control the first switch to be turned on if an external control signal output by the band-type brake signal unit is valid and the output detection unit does not detect a predetermined fault; when the first switch is turned on, the band-type brake coil is connected with a main power supply and starts to operate. The turn-off control module 502 is configured to control, in a first switch on state, the first switch to be turned off if an external control signal output by the band-type brake signal unit is valid and the output detection unit detects a predetermined fault; when the first switch is disconnected, the band-type brake coil is powered off to stop running.
The band-type brake coil control device 500 of this embodiment controls the power supply of the total power supply to the band-type brake coil by the above-mentioned on control module 501 and off control module 502 respectively, and the automatic control efficiency is higher, safe and reliable, and the circuit has a simple structure, and the control process noise is low, thereby having solved the problem that traditional band-type brake coil turn-off control efficiency is not high, has the effect that control efficiency is high.
In another embodiment, the on control module 501 and the off control module 502 of the band-type brake coil control device 500 may also be used to perform the steps of on and off control of the first switch 16 and the second switch 22 in the above embodiments.
Referring to fig. 7, in one embodiment, a band-type brake control power supply apparatus 200 is provided, which includes a power conversion unit 202, an output rectifying unit 204, and the band-type brake coil control circuit 100 in the above embodiment.
It will be appreciated that the common band-type brake control power supply apparatus 200 further generally includes a rectifying and filtering unit 206 and a driving unit 208. The rectifying and filtering unit 206 is connected to the total power supply 30, the power conversion unit 202 and the first switch 16, which supply power to the band-type brake coil 50, respectively. The driving unit 208 is connected to the power conversion unit 202, the band-type brake coil 50, the band-type brake signal unit 40, the output detection unit 18, and the control unit 12, respectively.
Specifically, the band-type brake control power supply apparatus 200 is generally an apparatus that performs power supply control for the band-type brake coil 50. When the total power supply 30 is powered on and the band-type brake coil 50 is powered on, the band-type brake control power supply device 200 rectifies and filters the alternating current input by the total power supply 30 through the rectifying and filtering unit 206 to obtain direct current output. The power conversion unit 202 performs power conversion on the direct current output by the rectifying and filtering unit 206, and outputs a driving current which is controlled by the driving unit 208 and the band-type brake signal unit 40 and is suitable for the band-type brake coil to work. The driving unit 208 generally drives the band-type brake coil 50 to work according to an external control signal output by the band-type brake signal unit 40. The band-type brake coil control circuit 100 detects the effective state of the external control signal output by the band-type brake signal unit 40 and the fault state of the internal circuit of the band-type brake control power supply device 200 in the working process of the band-type brake control power supply device 200, and timely controls the turn-off and the energization of the band-type brake coil 50.
In this way, the structure of the band-type brake control power supply device 200 incorporating the band-type brake coil control circuit 100 in the above embodiment is greatly simplified, the volume is greatly reduced, the control of the band-type brake coil 50 is more efficient during operation and the noise in the control process is lower.
In one embodiment, the rectifying and filtering unit 206 may be a conventional rectifying and filtering circuit, or may be another circuit or device having a rectifying and filtering output function, so long as the rectifying and filtering output can be implemented.
In another embodiment, the power conversion unit 202 may be an amplifier circuit for power conversion, or may be other circuit structures or devices with a power conversion function, so long as the power conversion output required by the band-type brake control power supply device 200 can be achieved.
In another embodiment, the driving unit 208 may be a common motor driver, such as a stepper motor driver, or may be other circuits or devices that may drive the band-type brake coil 50 to operate.
Referring to fig. 8, in another embodiment, the band-type brake control power supply apparatus 200 may further include a buffer unit 209. The buffer unit 209 is respectively connected to the output rectifying unit 204, the output detecting unit 18, and the band-type brake coil 50. The buffer unit 209 is used for discharging the output rectifying unit 204.
Optionally, the buffer unit 209 may be an RCD buffer circuit formed by a resistor, a capacitor and a diode, and by connecting one or more buffer units 209 in parallel to the output side of the output rectifying unit 204, the discharging action of the buffer unit 209 can be utilized to rapidly reduce the output voltage of the output rectifying unit 204, that is, the voltage of the input side of the band-type brake coil 50, so as to increase the turn-off speed of the band-type brake coil 50. In this way, the band-type brake control power supply device 200 can achieve higher turn-off efficiency of the band-type brake coil 50.
In one embodiment, the connection in the above embodiment may be an electrical connection or a communication connection.
In one embodiment, there is also provided an elevator comprising a car, a band-type brake coil 50, and a band-type brake control power supply apparatus 200 in the above embodiment.
It will be appreciated that the band-type brake coil 50 is typically provided in association with the power motor of the elevator, which is connected to the car in the hoistway by pulling the wire rope, and the band-type brake control power supply apparatus 200 is connected between the main power supply 30 of the elevator and the band-type brake coil 50. When the elevator runs, the band-type brake control power supply equipment 200 performs turn-off or energization control on the band-type brake coil 50, so that the band-type brake coil 50 brakes or removes braking on a power motor, and braking and releasing of the elevator car are achieved.
The elevator using the band-type brake control power supply device 200 in the embodiment has safer operation, smoother braking, safety and low noise.
In an alternative embodiment, the elevator in the above embodiment may be a general passenger vertical elevator, a freight vertical elevator, or an industrial elevator used in a construction site or factory building.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (13)
1. The band-type brake coil control circuit is characterized by comprising a control unit, an auxiliary power supply, a first switch, an output detection unit and a signal coupling unit, wherein the control unit is respectively connected with the auxiliary power supply, the first switch, the output detection unit and the signal coupling unit, and the first switch is connected with the auxiliary power supply and a total power supply for supplying power to the band-type brake coil; the power conversion unit and the output rectification unit of the band-type brake control power supply device are connected between the output detection unit and the first switch, the output detection unit is connected in series with the band-type brake coil, and the signal coupling unit is connected with the band-type brake signal unit which outputs an external control signal to the band-type brake coil;
The auxiliary power supply is used for adaptively supplying power to the control unit, the output detection unit is used for detecting an output electric signal of the rectification output unit, and the signal coupling unit is used for carrying out signal coupling on an external control signal output by the band-type brake signal unit and inputting the external control signal into the control unit; when the control unit detects that an external control signal output by the band-type brake signal unit is invalid and/or the output detection unit detects a preset fault, the control unit controls the first switch to turn off the power supply of the total power supply to the band-type brake coil;
The signal coupling unit is used for acquiring redundant external control signals through a redundant signal path formed by the photoelectric coupler when the band-type brake signal unit outputs the external control signals, and inputting the redundant external control signals to the control unit by utilizing the coupling effect, so that the control unit judges the validity of the external control signals, and controls the first switch to be turned off after a third preset time delay when the control unit detects that the external control signals output by the band-type brake signal unit are invalid, wherein the third preset time is selected according to the type of devices selected by the first switch or the requirement of control logic;
The control unit monitors the current flowing through the second switch, and if the current flowing through the second switch exceeds the maximum input current operated by the power conversion unit, the second switch is controlled to be disconnected so as to cut off the power supply of the total power supply to the band-type brake coil;
the band-type brake coil control circuit further comprises an input detection unit, wherein the input detection unit is respectively connected with the first switch, the second switch, the control unit and the rectifying and filtering unit of the band-type brake control power supply device, the input detection unit is used for detecting output electric signals of the rectifying and filtering unit, and when detecting that the rectifying and filtering unit has output overcurrent faults or insulation faults, the control unit controls the first switch and the second switch to be disconnected successively so as to cut off the power supply of the total power supply to the band-type brake coil.
2. A band-type brake coil control circuit according to claim 1, wherein the first switch is any one of a relay, a MOS transistor, a triode, a thyristor, and a compound switch.
3. A band-type brake coil control circuit according to claim 1, wherein the second switch is any one of a relay, a MOS transistor, a triode, a thyristor, and a compound switch.
4. A band-type brake coil control circuit according to claim 1, wherein the signal coupling unit comprises a photo coupler.
5. A band-type brake coil control method of a band-type brake coil control circuit according to any one of claims 1 to 4, comprising the steps of:
If the external control signal output by the band-type brake signal unit is effective and the output detection unit does not detect the preset fault, controlling the first switch to be turned on; when the first switch is turned on, the band-type brake coil is connected with a main power supply and starts to operate;
when the first switch is in a conducting state, if an external control signal output by the band-type brake signal unit is invalid and/or the output detection unit detects a preset fault, the first switch is controlled to be turned off; when the first switch is disconnected, the band-type brake coil is powered off to stop running.
6. A band-type brake coil control method according to claim 5, wherein the step of controlling the first switch to be turned on if the external control signal output from the band-type brake signal unit is valid and the output detection unit does not detect a predetermined failure, comprises:
And if the power supply output of the total power supply is normal and the output detection unit or the input detection unit does not detect the preset fault, controlling the second switch to be turned on for a first preset time in a delayed manner, and controlling the first switch to be turned on for a second preset time in a delayed manner.
7. A band-type brake coil control method according to claim 5, wherein in the on state of the first switch, if an external control signal output by the band-type brake signal unit is invalid and/or the output detection unit detects a predetermined fault, the step of controlling the first switch to be turned off includes:
And when the external control signal output by the band-type brake signal unit is invalid and/or if the output detection unit or the input detection unit detects a preset fault, the first switch is controlled to delay the turning-off of the third preset time, and the second switch is controlled to delay the turning-off of the fourth preset time.
8. A band-type brake coil control method according to claim 7, wherein, in the on state of the first switch, if the external control signal output by the band-type brake signal unit is invalid and/or the output detection unit detects a predetermined fault, the step of controlling the first switch to be turned off further comprises:
And if the external control signal output by the band-type brake signal unit is effective and the output detection unit or the input detection unit does not detect the preset fault, controlling the second switch to delay the conduction of the fifth preset time, and controlling the first switch to delay the conduction of the second preset time.
9. The band-type brake coil control method according to claim 8, wherein if the external control signal output by the band-type brake signal unit is valid and the output detection unit or the input detection unit does not detect a predetermined fault, the step of controlling the second switch to delay the conduction for a fifth preset time, and the step of controlling the first switch to delay the conduction for the second preset time, further comprises:
When the external control signal output by the band-type brake signal unit is invalid in the on state of the first switch and the second switch, the first switch is controlled to be turned off after a sixth preset time is delayed;
And after the first switch is turned off, if the external control signal output by the band-type brake signal unit is effective and the second switch is in a conducting state, controlling the first switch to delay the conduction of a seventh preset time.
10. A band-type brake coil control apparatus applied to a band-type brake coil control circuit as claimed in any one of claims 1 to 4, the apparatus comprising:
the conduction control module is used for controlling the first switch to be conducted if the external control signal output by the band-type brake signal unit is effective and the output detection unit does not detect the preset fault; when the first switch is turned on, the band-type brake coil is connected with a main power supply and starts to operate;
the turn-off control module is used for controlling the first switch to be turned off when the external control signal output by the band-type brake signal unit is effective and the output detection unit detects a preset fault under the on state of the first switch; when the first switch is disconnected, the band-type brake coil is powered off to stop running.
11. A band-type brake control power supply device, comprising a power conversion unit, an output rectifying unit, and a band-type brake coil control circuit according to any one of claims 1 to 4.
12. A band-type brake control power supply device according to claim 11, further comprising a buffer unit respectively connected to the output rectifying unit, the output detecting unit, and the band-type brake coil, the buffer unit being configured to discharge the output rectifying unit.
13. An elevator comprising a car, a band-type brake coil and a band-type brake control power supply apparatus as claimed in claim 11 or 12.
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| CN201711167242.XA CN107840219B (en) | 2017-11-21 | 2017-11-21 | Band-type brake coil control circuit and method, band-type brake control power supply equipment and elevator |
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| CN201711167242.XA CN107840219B (en) | 2017-11-21 | 2017-11-21 | Band-type brake coil control circuit and method, band-type brake control power supply equipment and elevator |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108821044B (en) * | 2018-05-30 | 2024-01-26 | 苏州汇川技术有限公司 | Band-type brake control circuit and elevator system |
| CN108773786B (en) * | 2018-06-04 | 2023-09-08 | 菱王电梯有限公司 | Power supply breaking device for elevator brake |
| CN109534111B (en) * | 2018-11-20 | 2021-12-10 | 日立楼宇技术（广州）有限公司 | Elevator safety control system and method |
| CN109399484B (en) * | 2018-11-20 | 2021-01-19 | 日立楼宇技术（广州）有限公司 | Brake control device and method |
| CN109264517A (en) * | 2018-11-20 | 2019-01-25 | 日立楼宇技术（广州）有限公司 | A kind of brake controller of elevator and method |
| CN110928179B (en) * | 2019-12-12 | 2023-10-20 | 深圳市英威腾电气股份有限公司 | Control system and method for safety band-type brake of frequency converter |
| CN111900897B (en) * | 2020-07-03 | 2022-02-22 | 广东博智林机器人有限公司 | Band-type brake circuit, servo driver and detection method of band-type brake circuit |
| CN114148854B (en) * | 2021-12-08 | 2023-05-26 | 武汉捷能自动化技术有限公司 | Elevator band-type brake detection method and system |
| CN114275640B (en) * | 2021-12-30 | 2024-08-09 | 苏州汇川控制技术有限公司 | Elevator controller and elevator |
| CN116573509A (en) * | 2023-06-30 | 2023-08-11 | 菱王电梯有限公司 | Control apparatus, elevator, and control method |
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| CN102070053B (en) * | 2010-10-26 | 2012-10-10 | 西子奥的斯电梯有限公司 | Test device of elevator car ascending overspeed protection device |
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| CN102040133A (en) * | 2010-12-30 | 2011-05-04 | 张长安 | Elevator power supply device |
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