JP6430566B2 - Elevator contactless power supply system - Google Patents

Description

  Embodiments of the present invention relate to a contactless power supply system for an elevator that supplies power necessary for a car in a contactless manner.

  In recent years, interest in non-contact power supply technology has increased, and it has come to be used in various fields. The non-contact power supply technology mainly uses the principle of electromagnetic induction, and transmits electric power in a non-contact manner by generating an electromotive force by applying an alternating magnetic flux generated in the primary coil to the secondary coil. Technology.

  In a non-contact power feeding system used for an elevator, it is considered to be cordless by feeding power consumed by a car in a non-contact manner. A power feeding device is provided on the hoistway side, and a power receiving device is provided on the car side. When the car comes to the power supply floor (the floor where the power supply device is installed), power is supplied from the power supply device to the power receiving device in a contactless manner. To do. The car is provided with a battery for storing electric power supplied in a non-contact manner. Electric power stored in the battery is used to drive equipment (lighting equipment, doors, etc.) in the car.

JP 2012-175857 A JP 2016-145088 A

  In the above-described contactless power feeding system for an elevator, when an abnormality occurs, the system (operation of the power feeding device) is stopped to prevent damage to the elements of the inverter due to heat generation. However, if the system is stopped, the electric power necessary for the car cannot be supplied, so the operation of the elevator itself is stopped, which causes trouble for the user.

  The problem to be solved by the present invention is to provide a non-contact power feeding system for an elevator that can continue power feeding to a car while preventing damage to an inverter element due to heat generation when an abnormality occurs.

A non-contact power supply system according to an embodiment supplies power to a car in a non-contact manner from a power supply device installed in a hoistway and charges a battery installed in the car. The contactless power supply system includes an abnormality detection unit that detects an abnormality of the power supply device, and restricts a power supply amount to the car when the abnormality of the power supply device is detected by the abnormality detection unit. Drive control means for driving the apparatus, and device control means for restricting the operation of the in-car device that uses the battery power when the power supply amount is restricted by the drive control means .

FIG. 1 is a diagram illustrating a configuration of an elevator according to the first embodiment. FIG. 2 is a diagram showing a configuration in the elevator car in the embodiment. FIG. 3 is a diagram schematically showing a configuration of a non-contact power feeding system used for the elevator in the same embodiment. FIG. 4 is a flowchart showing an operation during power feeding of the non-contact power feeding system in the same embodiment. FIG. 5 is a flowchart showing power supply control processing of the non-contact power supply system in the same embodiment. FIG. 6 is a block diagram showing a functional configuration of the elevator control apparatus according to the second embodiment. FIG. 7 is a flowchart showing in-car device control processing of the non-contact power feeding system in the same embodiment.

  Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram illustrating a configuration of an elevator according to the first embodiment. In addition, in the example of FIG. 1, although the structure of the 1: 1 roping type elevator is shown, it is not particularly limited to this structure.

  A car 11 and a counterweight 12 are provided in the elevator hoistway 10. The car 11 and the counterweight 12 are supported by guide rails (not shown) so as to be movable up and down. A car 11 is connected to one end of the main rope 13, and a counterweight 12 is connected to the other end of the main rope 13. The main rope 13 is wound around a main sheave 15 attached to the rotating shaft of the hoisting machine 14. The hoisting machine 14 is installed in the machine room of the building together with the elevator control device 16. In a machine roomless type elevator without a machine room, the hoisting machine 14 and the elevator control device 16 are installed in the hoistway 10.

  The elevator control device 16 controls the entire elevator including the drive control of the hoisting machine 14, and is sometimes referred to as a “control panel”. When the hoisting machine 14 is driven by a drive instruction from the elevator control device 16, the car 11 and the counterweight 12 are lifted and lowered in a slipping manner through the main rope 13 as the main sheave 15 rotates.

  The car 11 is provided with a car control device 17. The car control device 17 controls various devices installed in the car 11. As shown in FIG. 2, a car door 18 is installed in front of the car 11, and opens and closes by driving a door opening / closing device (motor) 19. A car operation panel 21 having various operation buttons including a display 20 and a destination floor button is installed in the vicinity of the car door 18. In addition, a lighting device 22 and an air conditioner 23 are installed on the ceiling surface. These devices in the car are driven by electric power of a battery 30 described later.

  Here, in the present embodiment, electric power is supplied to the car 11 in a contactless manner. Specifically, a power feeding device 31 is installed in the hoistway 10, and a power receiving device 32 is installed in the car 11. When the car 11 stops on a specific floor (power feeding floor), the power receiving device 31 receives the power from the power feeding device 31. The required power is supplied to 32 without contact. The power supply floor is installed on the top floor, for example. Alternatively, the power supply device 31 may be installed on the reference floor where the car 11 stops most frequently, or the power supply devices 31 may be installed at a plurality of locations such as the top floor, the middle floor, and the bottom floor. It may be left.

  The power receiving device 32 is installed on the side surface of the car 11 or the like so as to face the power feeding device 31 when the car 11 comes to the power feeding floor. A battery 30 is installed in the car 11, and the power received by the power receiving device 32 is stored in the battery 30. The electric power stored in the battery 30 is used for driving the above-described car equipment.

  Thus, the power cable connected to the car 11 is made unnecessary by performing the power necessary for driving the in-car device in a non-contact manner. The signal transmission between the elevator control device 16 and the car control device 17 may be wired or wireless.

  FIG. 3 is a diagram schematically showing a configuration of a non-contact power feeding system used for an elevator.

  The power feeding device 31 includes an inverter 41 and a power feeding coil 42. In addition, although a capacitor etc. are actually provided, illustration is abbreviate | omitted here. The inverter 41 receives DC power supplied from a commercial power supply (not shown) via an AC / DC converter, and converts it into AC power having a predetermined voltage and frequency. The feeding coil 42 is excited by AC power converted by the inverter 41. The power receiving device 32 includes a power receiving coil 43 that is coupled to the power feeding coil 42 by electromagnetic induction. The AC power received by the power receiving coil 43 is converted into DC power by the AC / DC converter 44 and stored in the battery 30.

  The power feeding device 31 is controlled by a power feeding control device 33 provided independently of the elevator control device 16. The power supply control device 33 performs ON / OFF control of a semiconductor element (switching element) such as an IGBT constituting the inverter 41 according to an instruction from the elevator control device 16.

  Here, in the present embodiment, the power supply control device 33 includes an abnormality detection unit 51, a drive control unit 52, and a notification unit 53. The abnormality detection unit 51 detects an abnormality in the power feeding device 31. The “abnormality” referred to here is a state in which the power supply efficiency is remarkably lowered due to, for example, aging degradation, and is different from a failure state. Normally, if the power supply operation is continued in such an abnormal state, the control is forcibly performed in the direction of increasing the power supply efficiency, so that a large load is applied to the inverter 41. As a result, the inverter 41 generates heat, and the switching element may be damaged to cause a failure.

  The abnormality detection unit 51 detects such an abnormal state having a possibility of failure in the future from the temperature rise or voltage rise of the inverter 41. The temperature rise of the inverter 41 is detected through a temperature sensor (not shown) installed near the inverter 41. The voltage rise of the inverter 41 is detected by a voltage sensor (not shown), for example, the voltage Vce between the collector and emitter of the semiconductor element.

  When the power feeding device 31 is in a normal state, the drive control unit 52 drives the inverter 41 so as to feed a certain amount of power. On the other hand, when the power feeding device 31 is in an abnormal state, the drive control unit 52 drives the power feeding device 31 by limiting the power feeding amount. When the abnormality detection unit 51 detects an abnormality in the power feeding device 31, the notification unit 53 issues a notification to that effect to the elevator control device 16.

Next, the operation of this system will be described.
FIG. 4 is a flowchart showing the operation of the system during power feeding.

  During normal operation, the car 11 moves in each floor in response to a hall call or car call. The “call to hall” is a call signal registered by operating a hall call button (not shown) installed at a hall on each floor, and includes information on a registered floor and a destination direction. The “car call” is a call signal registered by operating a destination call button (not shown) provided in the car room, and includes information on the destination floor.

  Here, when the remaining amount of the battery 30 provided in the car 11 falls below a certain value (for example, 50% of the total capacity) (Yes in step S11), a charge request signal is sent from the car control device 17 to the elevator control device 16. Is output.

  Upon receiving this charge request signal, the elevator control device 16 first checks the current call registration state. When the hall call and the car call are not registered, that is, when the car 11 is in a non-directional standby state (Yes in step S12), the elevator control device 16 changes the car 11 Move to the power supply floor (step S13).

  As shown in FIG. 1, a power supply device 31 is installed on the power supply floor, and when the car 11 reaches the power supply floor, the power reception device 32 provided on the car 11 and the power supply device 31 face each other. Then, non-contact power feeding is performed (step S14). The electric power supplied to the car 11 by this non-contact power supply is converted into direct current by the AC / DC converter 44 and then stored in the battery 30.

  When a new call (a landing call / car call) is registered after the charging of the battery 30 is completed (Yes in step S15), the elevator control device 16 causes the car 11 to respond to the registration floor of the call (step S16). ).

  If a call registration is made during charging and the required minimum remaining capacity (for example, 10% of the total capacity) is satisfied, charging may be interrupted and the call answered, or a predetermined amount ( For example, charging may be performed until reaching 80% of the total capacity, and then the call may be answered.

  In addition, power is supplied when the remaining amount of the battery 30 is equal to or less than a predetermined value. good.

  Further, when the car 11 stops at the power supply floor due to call registration, non-contact power supply is performed each time. In addition, the power supply floor (floor on which the power supply device 31 is installed) is not limited to one place, and may be a plurality of places.

  Here, in this embodiment, when non-contact power feeding is performed to the car 11 in step S14, the power feeding operation is controlled according to whether or not the power feeding device 31 is abnormal. The state at this time is shown in FIG.

  FIG. 5 is a flowchart showing power supply control processing of the present system.

  The power feeding control device 33 detects the temperature and voltage of the inverter 41 (step S21). Here, both temperature and voltage are detected, but either one may be detected.

  Here, if the temperature and voltage of the inverter 41 are within the set reference values (Yes in step S22), the power feeding control device 33 determines that the power feeding device 31 is in a normal state, and the car 11 The power feeding device 31 is controlled so that a certain amount of power is fed (step S23). Specifically, as shown in FIG. 3, the inverter 41 is driven and controlled to excite the feeding coil 42, and a certain amount of power is sent from the feeding coil 42 to the receiving coil 43. The power received by the power receiving coil 43 is stored in the battery 30 via the AC / DC converter 44. The electric power stored in the battery 30 is used as a drive source for in-car devices such as the lighting device 22 and the air conditioner 23 during operation of the elevator.

  On the other hand, when at least one of the temperature and the voltage of the inverter 41 exceeds the set reference value, that is, when the temperature and / or voltage exceeds both the reference values (No in step S22), the power supply control device 33 limits the amount of power supplied to the car 11 (step S24). Specifically, the power supply control device 33 drives and controls the inverter 41 so as to supply power while limiting the power supply amount to the car 11 to, for example, half of the normal time. In addition, as a method for limiting the amount of power supply, there are a method of supplying power by decreasing a current value, or a method of supplying power by gradually increasing the current value from the minimum value with time.

  By limiting the power supply amount in this way, the load on the inverter 41 is reduced, so that it is possible to continue power supply while preventing element damage due to heat generation. However, if power supply is continued for a long time in this state, there is a high possibility of failure. Therefore, the power supply control device 33 notifies the elevator control device 16 that the power supply device 31 is in an abnormal state (step S25). Upon receiving this notification, the elevator control device 16 warns that the power feeding device 31 is in an abnormal state by, for example, lighting a lamp (not shown). As a result, when the maintenance staff comes to check the elevator, it is possible to grasp that the power feeding device 31 is in an abnormal state, and it is possible to take measures such as parts replacement.

  Note that the elevator control device 16 may be connected to an external monitoring center via a communication network to notify that the power feeding device 31 is in an abnormal state. Upon receiving this notification, the monitoring center requests an inspection by e-mail or the like to the maintenance staff inspecting the elevator or the office in the jurisdiction.

  As described above, according to the first embodiment, by limiting the amount of power supply when abnormality occurs in the power supply device 31, damage to the element due to heat generation can be prevented, and at least until maintenance personnel come to check. In the meantime, the contactless power feeding to the car 11 can be performed to continue the operation of the elevator.

  In the first embodiment, the elevator control device 16 and the power supply control device 33 are provided independently. However, the elevator control device 16 has functions of the power supply control device 33 (an abnormality detection unit 51, a drive control unit 52, a power generation unit). It is good also as a structure provided with the information part 53) and the elevator control apparatus 16 performing the electric power feeding control process shown in FIG.

(Second Embodiment)
Next, a second embodiment will be described.

  When the amount of power supplied to the car 11 is limited, the amount of power consumed by the operation of the devices in the car may be larger than the amount of power supplied. In this case, there is no problem as long as the time for charging the battery 30 is sufficient, but the remaining amount of the battery 30 is remarkably reduced because, for example, the time for charging is small at the time of congestion such as when going to work or leaving work. Therefore, in the second embodiment, the power consumption is reduced by restricting the operation of the in-car device when the power supply amount is restricted.

  FIG. 6 is a block diagram showing a functional configuration of the elevator control device 16 according to the second embodiment.

  The elevator control device 16 includes a device control unit 54 as a function related to the second embodiment. When the power supply amount to the car 11 is limited, the device control unit 54 limits some or all operations of the car devices according to the remaining amount of the battery 30. The in-car devices include the door opening / closing device 19, the display 20, the car operation panel 21, the lighting device 22, the air conditioning device 23, and the like shown in FIG.

  FIG. 7 is a flowchart showing in-car device control processing of the non-contact power feeding system according to the second embodiment.

  As described in the first embodiment, when an abnormality of the power feeding device 31 is detected by the power feeding control device 33, the power feeding amount to the car 11 is limited. Here, when the elevator control device 16 confirms that the power supply amount is limited by the operation signal from the power supply control device 33 (Yes in step S31), the elevator control device 16 checks the remaining amount of the battery 30 (step S32). As a result, when the remaining amount of the battery 30 is below a certain level (Yes in step S33), the device control unit 54 of the elevator control device 16 restricts some or all of the operations in the car device. (Step S34).

  Here, “restricting the operation of some or all of the devices in the car” specifically means the door opening / closing device 19, the display device 20, the car operation panel 21, the lighting device 22, the air conditioning device 23. Or restricting the operation of at least one of the devices as a restriction target or restricting all the devices as restriction targets.

  The method for restricting operation differs depending on the device. For example, in the case of the door opening / closing device 19, the door motor is driven at a lower rotational speed than normal. In the case of the display device 20, the brightness of the screen is made lower than normal. In the case of the car operation panel 21, the brightness when the button is lit is lowered as compared with the normal time. In the case of the lighting device 22, the luminance of the illumination is lowered than that at the normal time. In the case of the air conditioner 23, the wind power is lowered than usual. In short, the operation may be limited so as to reduce power consumption.

  Further, the number of devices to be restricted may be increased in stages according to the remaining amount of the battery 30. In this case, as the remaining amount of the battery 30 is smaller, the number of restriction target devices is increased. The order for increasing the number of devices to be restricted is determined in advance according to the importance level.

  Further, the operation restriction may be increased stepwise according to the remaining amount of the battery 30. For example, in the case of the lighting device 22, the luminance of the illumination is lowered as the remaining amount of the battery 30 is smaller. Furthermore, it is possible to increase both the number of devices to be restricted in a stepwise manner according to the remaining amount of the battery 30 and increase the operation restriction in a stepwise manner.

  As described above, according to the second embodiment, by restricting the operation of the in-car device when the power supply amount is limited due to the abnormality of the power supply device 31, the amount of power consumed by the operation of the in-car device can be reduced. Elevator operation can be continued with restraint.

  In the second embodiment, the elevator control device 16 is provided with a function (device control unit 54) for restricting the operation of the in-car device. However, the car control device 17 is provided with this function, and the car control device 17 May be configured to execute the in-car device control process shown in FIG.

  According to at least one embodiment described above, it is possible to provide a non-contact power feeding system for an elevator that can continue power feeding to a car while preventing damage to an inverter element due to heat generation when an abnormality occurs. .

  In addition, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 10 ... Hoistway, 11 ... Ride car, 12 ... Counterweight, 13 ... Main rope, 14 ... Hoisting machine, 15 ... Main sheave, 16 ... Elevator control device, 17 ... Car control device, 18 ... Car door, 19 ... Door opening / closing device, 21 ... car operation panel, 22 ... lighting device, 23 ... air conditioning device, 31 ... power feeding device, 32 ... power receiving device, 33 ... power feeding control device, 41 ... inverter, 42 ... power feeding coil, 43 ... power receiving coil, 44 ... AC / DC converter, 51 ... abnormality detection unit, 52 ... drive control unit, 53 ... reporting unit, 54 ... equipment control unit.

Claims (8)

In a contactless power feeding system for an elevator that feeds power in a non-contact manner to a car from a power feeding device installed in a hoistway, and charges a battery installed in the car.
An abnormality detecting means for detecting an abnormality of the power feeding device;
Drive control means for limiting the amount of power supplied to the car and driving the power supply apparatus when an abnormality of the power supply apparatus is detected by the abnormality detection means ;
An elevator non-contact power feeding system comprising: device control means for restricting the operation of the equipment in the car that uses the battery power when the power supply amount is restricted by the drive control means . The abnormality detecting means is
2. The contactless power feeding system for an elevator according to claim 1, wherein a state in which the temperature in the power feeding device exceeds a preset reference value is detected as an abnormality. The abnormality detecting means is
The contactless power feeding system for an elevator according to claim 1, wherein a state in which a voltage of an inverter constituting the power feeding device exceeds a preset reference value is detected as an abnormality.   The contactless power feeding system for an elevator according to claim 1, further comprising a reporting means for reporting that an abnormality of the power feeding device is detected. The device control means is
When the remaining amount of the battery is below a predetermined value, the non-contact power supply system for an elevator according to claim 1, wherein the restricting some or all of the operation of the car in the apparatus. The device control means is
6. The contactless power feeding system for an elevator according to claim 5 , wherein when the remaining amount of the battery becomes equal to or less than a predetermined value, the number of devices to be restricted is increased stepwise according to the remaining amount at that time. The device control means is
6. The non-contact power supply for an elevator according to claim 5 , wherein when the remaining amount of the battery becomes equal to or less than a predetermined value, the operation restriction on the in-car device is gradually increased according to the remaining amount at that time. system. The device control means is
When the remaining amount of the battery falls below a certain value, the number of devices to be restricted is increased stepwise according to the remaining amount at that time, and the operation restriction on the device is increased stepwise. The non-contact electric power feeding system of the elevator of Claim 5 .

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