CN209948675U - Elevator car power supply system - Google Patents
Elevator car power supply system Download PDFInfo
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- CN209948675U CN209948675U CN201921276085.0U CN201921276085U CN209948675U CN 209948675 U CN209948675 U CN 209948675U CN 201921276085 U CN201921276085 U CN 201921276085U CN 209948675 U CN209948675 U CN 209948675U
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Abstract
The utility model provides an elevator car power supply system, include: the elevator control cabinet comprises a level controller arranged inside an elevator control cabinet, a power transmission assembly arranged in an elevator shaft, a power receiving assembly arranged on the top of a car and electrically connected with the power transmission assembly, a power storage assembly arranged on the top of the car and electrically connected with the power receiving assembly, and a voltage conversion assembly arranged on the top of the car and electrically connected with the power storage assembly. The utility model discloses utilize powerful power to receive subassembly and efficient power storage subassembly, operate the interval at every turn or operate simultaneously for power storage subassembly charge at the car to when the elevator next time operates, only rely on power storage subassembly's electric power can supply the car power consumption, can practice thrift the core number of retinue cable by a wide margin, reduce the cost of elevator and retinue cable.
Description
Technical Field
The utility model relates to an elevator operation technical field especially relates to an elevator car power supply system.
Background
In a conventional elevator car power supply system, power supplies of various voltage levels are required to maintain normal operation of each electrical component of a car, and the power supply voltage levels required by the electrical components such as car lighting, calling, door motors and the like are different. And the power supply of the voltage class transmits the machine room power supply to the top of the car through the elevator traveling cable. When the electrical components of the car or the car roof are increased, the number of power cores of the traveling cable is increased.
With the continuous development of elevator products, the number of floors of buildings and the lifting height of elevators are also continuously increased, and various electrical components on the car or the top of the car are also increased. In order to meet the power demand of the elevator car for increasing the lift, the number of power cores of the traveling cable must be increased continuously, so that the weight of the traveling cable is increased inevitably, the weight of the whole elevator system is increased, and the cost of the elevator and the traveling cable is increased accordingly.
Meanwhile, with the continuous development of elevator technology, common signals of an elevator machine room and a car can be transmitted through wireless communication, and the wireless propulsion of the car is restricted by the power supply mode of a traveling cable of the car.
Therefore, how to reduce the core number of the traveling cable, even cancel the traveling cable, reduce the cost of the elevator and the traveling cable, promote the elevator car to be wireless, and become a technical problem to be solved urgently in the development of elevator car power supply.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an elevator car power supply system to the technical problem who exists among the prior art, can practice thrift the retinue cable core by a wide margin, reduce the cost of elevator and retinue cable.
In order to achieve the above object, the utility model provides an elevator car power supply system, include: the level controller is arranged in the elevator control cabinet and used for receiving an external power supply and converting the external power supply into at least one path of power supply; the power transmission assembly is installed in an elevator shaft, electrically connected with the level controller and extends to the bottom of the elevator shaft, and is used for transmitting the power supply; the power supply receiving assembly is arranged on the top of the lift car, is electrically connected with the power supply transmission assembly and is used for receiving the power supply; the power supply storage assembly is arranged on the top of the car, is electrically connected with the power supply receiving assembly and is used for storing the power supply; and the voltage conversion assembly is arranged on the top of the car, is electrically connected with the power storage assembly, and is used for converting the power stored by the power storage assembly into a car power supply with corresponding voltage grades required by different electrical components of the car and supplying power.
The utility model has the advantages that: the utility model discloses utilize powerful power to receive subassembly and efficient power storage subassembly, move the interval at every turn or move the car and charge for power storage subassembly simultaneously to when the elevator next time moves, only rely on power storage subassembly's electric power can supply the car power consumption. The utility model discloses can practice thrift the core number of retinue cable by a wide margin, cancel the retinue cable even, reduce the cost of elevator and retinue cable. The utility model discloses can also cooperate wireless communication technique, thoroughly remove the retinue cable, impel elevator car wireless. Compare current wireless charging technology, the utility model discloses charge efficiency is high, with low costs, satisfies the use occasion of the high-power consumption of car.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of the structure of an elevator car power supply system of the present invention;
fig. 2, a schematic view of a first embodiment of an elevator car power supply system of the present invention;
fig. 3A, a schematic view of a second embodiment of an elevator car power supply system of the present invention;
fig. 3B is a cross-sectional view of the installation position of the collector shoe and the power supply guide rail in the overlooking view.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention. The terms "first," "second," "third," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so described are interchangeable under appropriate circumstances. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
Please refer to fig. 1, the structure of the elevator car power supply system of the present invention is schematically illustrated. The elevator car power supply system includes: level controller 11, power transmitting component 12, power receiving component 13, power storing component 14 and voltage converting component 15.
Specifically, the level controller 11 is installed inside an elevator control cabinet 201 (shown in fig. 2) for receiving an external power and converting the external power into at least one power supply. The main functions of the level controller 11 are: the alternating current of the city grid is converted into direct current, or direct current at a direct current bus is introduced, and the direct current and the converted alternating current are transmitted through the power transmission assembly 12 to serve as a main source of the car power supply. The type of power output by the level controller 11 includes, but is not limited to, AC220V, DC48V, etc. The level controller 11 includes but is not limited to: the analog level conversion device and the digital level conversion device can convert one power supply into one or more different power supplies.
In a further embodiment, at least one of an overcurrent detection protection unit, a short-circuit detection protection unit and an electric leakage detection protection unit is arranged in the level controller 11, and is used for cutting off the power output of the level controller 11 when detecting corresponding abnormality and outputting a fault signal to the elevator main control board. That is, the level controller 11 has functions of detecting and protecting overcurrent, short circuit, and electric leakage, and can cut off the power supply when an abnormality occurs, thereby ensuring the safety of equipment and personnel. For example, an overcurrent detection protection unit may be disposed inside the level controller 11, and when a power supply exceeding a rated current passes through the level controller 11, the level controller 11 will cut off output, so as to ensure the safety of a back-end device; a leakage detection protection unit can be arranged in the level controller 11, and when the leakage current exceeds a set value during the working period of the level controller 11, the output is immediately cut off, and the level controller stops working; the abnormality detection protection unit can output a fault signal to the elevator main control board, so that a monitoring person can know whether the level controller 11 is in a normal working state or an abnormal fault state.
Specifically, the power transmission assembly 12 is installed in an elevator shaft 202 (shown in fig. 2), electrically connected to the level controller 11 and extending to the bottom of the elevator shaft 202 for transmitting the power. The power transmission assembly 12 extends from the elevator control cabinet 201 to the bottom of the elevator shaft 202 throughout the entire shaft and has the main functions of: the power supply provided by the level controller 11 is transmitted downstream, i.e. mainly functions as a power supply transmission.
In further embodiments, the power transmission assembly 12 may employ a power supply line 221 (shown in fig. 2), wherein the power supply line 221 branches off a branch line at each landing 209 (shown in fig. 2), and each branch line is electrically connected to a power supply connector 222 (shown in fig. 2); when the power supply connector 222 on a branch line is electrically connected to the power receiving module 13, the power supply on the power supply line 221 is transmitted to the power receiving module 13 through the corresponding power supply connector 222. That is, the power supply line 221 is used in cooperation with the power supply connector 222 of each landing 209 in the elevator shaft 202, and stable power is continuously supplied to the power receiving module 13 through the corresponding power supply connector 222. The power supply line 221 is generally a multi-core power supply line, and the type of the power supply in the power supply line 221 is the same as the type of the power supply output by the level controller 12. The power supply connector 222 may be disposed in an open access manner, and may be conveniently connected to the power receiving module 13 disposed on the car, and the power supply connector 222 may also be disposed in a manner of being extended after the car stops. When the elevator is stopped at the stopping landing 209, the power receiving component 13 can be in reliable contact with the corresponding power supply connector 222; when the elevator is running, the power receiving assembly 13 is out of non-contact or short contact with the power supply connector 22 in the hoistway. Therefore, each power supply connector 222 can detect whether the power supply connector is reliably contacted with the power receiving component 13 in real time, and if the power supply connector is reliably connected, the corresponding power supply connector 222 can output the power supply on the power supply line 221; otherwise, the power supply connector 222 is in a dead safe state and does not output any power. That is, even if the power receiving unit 13 makes short contact with the power supply connector 22 in the hoistway, it does not receive power from the power supply connector 222, and short-time power supply shock is avoided.
In a further embodiment, the power transmission assembly 12 may employ a power rail 32 (shown in fig. 3), and the power receiving assembly 13 is always in reliable contact with the power rail 22. At this time, no matter the elevator car is stopped at the stopping landing 209 or in operation, since the power receiving component 13 is always in contact with the power supply rail 32, the power output by the level controller 11 can be transmitted to the power receiving component 13 through the power supply rail 32 at any position at any time. The power supply guide rail 32 is generally a rigid electrified guide rail, the exposed part of the guide rail keeps a safe insulation distance from a wall body and a hoistway component, and an insulation protection shell is arranged outside the contact surface of the power supply receiving assembly 13.
Specifically, the power receiving assembly 13 is mounted on the top of the car 203 (shown in fig. 2), and is electrically connected to the power transmitting assembly 12 for receiving the power supply.
In a further embodiment, the power receiving assembly 13 may employ a current collector 23 (shown in fig. 2) that cooperates with the power supply connector 222 and the power supply line 221. When the elevator is stopped at the stopping landing 209, the power supply connector 222 is in reliable contact with the current collector 23, and large-current power supply to the current collector 23 is realized. When the elevator runs, the current collector 23 is separated from the power supply connector 222 in the hoistway and is not in contact or short-time contact, power transmission is not carried out, and impact of short-time power on the current collector 23 is avoided.
In a further embodiment, the power receiving assembly 13 may employ a collector shoe 33 (shown in fig. 3) that cooperates with the power rail 32. The collector shoe 33 is always in reliable contact with the supply rail 32 and the elevator can obtain high voltage power at any time and at any position. Collector shoes, also known as current collecting shoes, are current collecting devices that obtain electrical energy by contacting with a power supply rail.
Specifically, the power storage assembly 14 is mounted on the top of the car 203 and electrically connected to the power receiving assembly 13 for storing the power supply. The power storage component 14 may be a high-capacity lithium battery or a high-efficiency super capacitor, and has a main function of storing the electric energy obtained by the power receiving component 13. When the power supply is high-voltage and high-current, the power storage assembly 14 is charged to store electric energy; when the stored electric energy is released, a low-voltage and low-current mode is adopted to ensure enough power supply allowance.
Specifically, the voltage conversion assembly 15 is installed on the top of the car 203 and electrically connected with the power storage assembly 14, and is used for converting the power stored in the power storage assembly 14 into car power with corresponding voltage levels required by different electrical components of the car and supplying power. Because the voltage levels required by the electrical components of the car are not exactly the same, the voltage conversion module 15 converts the power supply stored in the power storage module 14 according to the actual conditions of the electrical components with different voltage levels, outputs stable and safe power with different voltage levels, and provides the power to the electrical components such as the lighting, the fan, the call button and the like in the car, and provides the electrical components such as the door motor and the car controller on the top of the car. The voltage conversion assembly 15 includes, but is not limited to: analog voltage conversion devices (e.g., voltage level converters) and digital voltage conversion devices (e.g., voltage converters with integrated logic functions) may be implemented to convert one power source to one or more different power sources.
In a further embodiment, the voltage conversion component 15 is further electrically connected to the power receiving component 13; when the elevator is standing by at the stopping landing 209, the voltage conversion module 15 is further used for switching the power supply state, converting the power supply received by the power supply receiving module 13 into car power of corresponding voltage levels required by different electrical components of the car, and supplying power. That is, when the elevator is on standby at the stopping landing 209, the power storage component 14 stores the power supplied from the level controller 11, and at the same time, the voltage conversion component 15 switches the power supply state, so that all the electrical components of the car system directly use the power received from the power receiving component 13 without using the electric energy stored in the power storage component 14, thereby ensuring the storage capacity and the power supply durability of the power storage component.
The utility model discloses elevator car power supply system utilizes powerful power to receive subassembly and efficient power storage subassembly, moves the interval at every turn or moves the while and charges for power storage subassembly at the car to when the elevator next time moves, only rely on power storage subassembly's electric power can supply the car power consumption. The utility model discloses can practice thrift the core number of elevator retinue cable by a wide margin, cancel retinue cable even, reduce the cost of elevator and retinue cable. The utility model discloses can also cooperate wireless communication technique, thoroughly remove the retinue cable, impel elevator car wireless. Compare current wireless charging technology, the utility model discloses charge efficiency is high, with low costs, satisfies the use occasion of the high-power consumption of car.
Referring to fig. 2, a schematic diagram of a first embodiment of an elevator car power supply system according to the present invention is shown. In this embodiment, the elevator car power supply system includes: a level controller 11, a power supply line 221, a plurality of power supply connectors 222, a current collector 23, a power storage device 14 and a voltage conversion device 15.
The level controller 11 is installed in the elevator control cabinet 201, the front end of the level controller is electrically connected with the commercial power supply (AC220V), the alternating power supply is converted by internal voltage, and DC48V, AC110V and AC22V power supplies are generated and output from the rear end of the level controller. The level controller 11 has an overcurrent detection protection function, and can cut off output when a power supply exceeding rated current passes through, so that the safety of rear-end equipment is ensured; the level controller 11 also has a leakage detection protection function, and immediately cuts off the output and stops operating when the leakage current exceeds a set value during its operation. The above-mentioned abnormal detection protection can output the fault signal to the elevator main control board, so that the monitoring personnel can know whether the level controller 11 is in the normal working state or the abnormal fault state.
The power supply line 221 is electrically connected to the level controller 11, and multiple power sources output by the level controller 11 are transmitted through the power supply line. The power supply line 221 extends from the elevator control cabinet 201 of the machine room to the bottom of the elevator shaft 202 throughout the entire shaft. The kind of power source in the power supply line 221 coincides with the kind of power source output by the level controller 11. If N layers of stopping landings 209 are arranged outside the customer elevator hall, the power supply line 221 branches off a branch line at each stopping landing 209, and the total number is N branch lines. One power supply connector 222 is installed at the back end of each branch line, and a total of N power supply connectors 222 are installed. The power supply connector 222 may be in an open access manner and may be conveniently connected to a current collector 23 mounted on the car 203. Each power supply connector 222 detects whether the power supply connector is reliably connected with the current collector 23 in real time, and if the power supply connector is reliably connected with the current collector, the corresponding power supply connector 222 can output power on the power supply line 221; the power supply connector 222 is in a dead safe state and does not output any power.
The current collector 23 is mounted on top of the car 203 for receiving the power supply. The current collectors 23 may be of fixed form and electrically connected to the respective power supply connector 222 after the elevator stops at the stopping station 209, to receive the power supply through the power supply connector 222; when the elevator is in operation, even if the current collector 23 is in contact with a certain power supply connector 222, the current collector 23 does not receive power from the corresponding power supply connector 222 because of the short contact time, thereby avoiding short-time power supply shock. The current collector may also be of a telescopic type, in an extended state after the elevator stops at the stopping landing 209, and electrically connected to the corresponding power supply connector 222 to receive the power supply through the power supply connector 222; when the elevator runs, the elevator is in a retracted state and is not always in contact with any power supply connector 222, and power transmission cannot be generated.
The power storage assembly 14 is also mounted on top of the car 203 and is electrically connected to the current collector 23. The power storage assembly 14 stores the electrical energy captured by the current collector 23 after the current collector 23 receives the power transmitted from the power connector 222. The energy storage medium of the power storage component 14 may be a large-capacity lithium battery or a high-efficiency super capacitor. When the power supply is high-voltage and high-current, the power storage assembly 14 is charged to store electric energy; when the stored electric energy is released, a low-voltage and low-current mode is adopted, and sufficient power supply allowance is guaranteed.
The voltage conversion assembly 15 is also mounted on top of the car 203 and is electrically connected to the power storage assembly 14. Because the voltage levels required by the electrical components of the car are not exactly the same, the voltage conversion module 15 converts the power supply stored in the power storage module 14 according to the actual conditions of the electrical components with different voltage levels, outputs stable and safe power with different voltage levels, and provides the power to the electrical components such as the lighting, the fan, the call button and the like in the car, and provides the electrical components such as the door motor and the car controller on the top of the car.
The voltage conversion assembly 15 is further electrically connected to the current collector 23; when the elevator is standing by at the stopping landing 209, the voltage conversion assembly 15 is further used for switching the power supply state, converting the power supply received by the current collector 23 into car power of the corresponding voltage level required by the different electrical components of the car, and supplying power. That is, when the elevator is standing by at the stopping landing 209, the power storage module 14 stores the power supplied from the level controller 11, and at the same time, the voltage conversion module 15 switches the power supply state, so that all the electrical components of the car system directly use the power received from the collector 23 without using the electric energy stored in the power storage module 14, thereby ensuring the storage capacity and the power supply durability of the power storage module.
Please refer to fig. 3A-3B together, wherein fig. 3A is a schematic diagram of a second embodiment of the elevator car power supply system of the present invention, and fig. 3B is a cross-sectional view of the installation position of the collecting shoe and the power supply rail of the present invention in a top view. The difference from the embodiment shown in fig. 2 is that, in this embodiment, the power transmission assembly 12 uses a power supply rail 32, and the power receiving assembly 13 uses a collector shoe 33.
As shown in fig. 3A, the power supply rail 32 is directly connected to the level controller 11 for transmitting the power output by the level controller 11. The power supply guide rail 32 is a rigid electrified guide rail, and extends from the elevator control cabinet 201 of the machine room to the bottom of the elevator shaft 202, and penetrates through the whole shaft. With the supply rail 32, power can be continuously provided to the car and more to the electrical energy storage assembly 14 with a continuous supply of electrical energy.
The collector shoe 33 is installed on the top of the car 203, and the collector shoe 33 is always in reliable contact with the power supply guide rail 32 and is used for receiving the power supply. When the collector shoe 33 receives power from the level controller 11, the obtained power is stored in the power storage assembly 14. The elevator can obtain high voltage power at any position at any time, regardless of whether the elevator car is at a stop at the stopping landing 209 or in a run state, the collector shoe 33 is in constant reliable contact with the supply rail 32.
As shown in fig. 3B, in a top view, the power supply rail 32 has a first side 321 and an opposite second side 322; an insulating shell 323 is arranged on the first side 321, and the collector shoe 33 is in contact with the power supply guide rail 32 through an opening in the insulating shell 323; the second side 322 has insulated terminals 324 extending therefrom to maintain an insulation distance from walls and hoistway components within the elevator hoistway 202; a first part 331 of the open area of the collector shoe 33 on the insulating housing 323 is covered with an insulating sheath 333. That is, the power supply rail 32 is connected to the car rail 302 provided on the wall 301 in the elevator shaft 202 via the insulated terminal 324, so that the exposed portion of the power supply rail 32 maintains a safe insulation distance from the wall and shaft components in the elevator shaft 202; the collector shoe 33 is surrounded by an insulating sheath 333 by an outward leading portion of the power supply rail 32. The power supply guide rail 32 and the collector shoe 33 are insulated from each other, so that short circuit caused by abnormal contact of other parts is avoided.
In a further embodiment, the collector shoe 33 has a second portion 332 contacting the power supply rail 32, and a pressing structure 334 is disposed between the second portion 332 and the insulating housing 323, wherein the pressing structure 334 is used for adjusting a contact force between the collector shoe 33 and the power supply rail 32, so that the collector shoe 33 is always in reliable contact with the power supply rail 32. By adopting the pressing structure 334, even if the power supply guide rail 32 is slightly deformed, the collector shoe 33 can be ensured to be reliably contacted with the power supply guide rail 32, so that the looseness is prevented.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. An elevator car power supply system, comprising:
the level controller is arranged in the elevator control cabinet and used for receiving an external power supply and converting the external power supply into at least one path of power supply;
the power transmission assembly is installed in an elevator shaft, electrically connected with the level controller and extends to the bottom of the elevator shaft, and is used for transmitting the power supply;
the power supply receiving assembly is arranged on the top of the lift car, is electrically connected with the power supply transmission assembly and is used for receiving the power supply;
the power supply storage assembly is arranged on the top of the car, is electrically connected with the power supply receiving assembly and is used for storing the power supply;
and the voltage conversion assembly is arranged on the top of the car, is electrically connected with the power storage assembly, and is used for converting the power stored by the power storage assembly into a car power supply with corresponding voltage grades required by different electrical components of the car and supplying power.
2. The system of claim 1, wherein at least one of an overcurrent detection protection unit, a short circuit detection protection unit or an electric leakage detection protection unit is arranged in the level controller, and is used for cutting off the power supply output of the level controller when detecting corresponding abnormity and outputting a fault signal to the elevator main control panel.
3. The system of claim 1, wherein the power transmission assembly is a power supply line, the power supply line branches off at each landing, each branch is electrically connected with a power supply connector, and the power receiving assembly is a current collector;
and when the current collectors are electrically connected with corresponding power supply connectors, the power supply connectors output the power supply on the power supply line to the current collectors.
4. The system of claim 3, wherein the current collector is in a fixed form and is electrically connected with a corresponding power supply connector after the elevator stops at the stopping landing to receive the power supply through the power supply connector; or
The current collector is in a telescopic form, is in an extended state after the elevator stops at a stopping landing, and is electrically connected with the corresponding power supply connector so as to receive the power supply through the power supply connector, and is in a retracted state when the elevator runs.
5. The system of claim 1, wherein the power transmission assembly employs a power rail and the power receiving assembly employs a collector shoe; the collector shoe is in contact with the power supply guide rail to receive the power supply through the power supply guide rail.
6. The system of claim 5,
the power supply rail has a first side and an opposite second side; an insulating shell is arranged on the first side face, and the collector shoe is in contact with the power supply guide rail through an opening in the insulating shell; the second side surface is extended with an insulation terminal so as to keep an insulation distance with a wall body and a shaft component in the elevator shaft;
a first part of the opening area of the collector shoe on the insulating shell is covered with an insulating sheath.
7. The system of claim 6, wherein the collector shoe has a second portion in contact with the power supply rail, and a compression structure is provided between the second portion and the insulating housing for adjusting a contact force between the collector shoe and the power supply rail.
8. The system of claim 1, wherein the voltage conversion component is further electrically connected to the power receiving component;
when the elevator is in standby at a stopping landing, the voltage conversion assembly is further used for switching a power supply state, converting the power supply received by the power supply receiving assembly into a car power supply with corresponding voltage levels required by different electrical components of the car, and supplying power.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921276085.0U CN209948675U (en) | 2019-08-08 | 2019-08-08 | Elevator car power supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921276085.0U CN209948675U (en) | 2019-08-08 | 2019-08-08 | Elevator car power supply system |
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| CN209948675U true CN209948675U (en) | 2020-01-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323750A (en) * | 2019-08-08 | 2019-10-11 | 日立电梯(上海)有限公司 | A kind of lift car power supply system and its method of supplying power to |
| CN111675065A (en) * | 2020-06-08 | 2020-09-18 | 日立楼宇技术（广州）有限公司 | Power supply detection method, system, device, equipment and storage medium of elevator |
-
2019
- 2019-08-08 CN CN201921276085.0U patent/CN209948675U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323750A (en) * | 2019-08-08 | 2019-10-11 | 日立电梯(上海)有限公司 | A kind of lift car power supply system and its method of supplying power to |
| CN111675065A (en) * | 2020-06-08 | 2020-09-18 | 日立楼宇技术（广州）有限公司 | Power supply detection method, system, device, equipment and storage medium of elevator |
| CN111675065B (en) * | 2020-06-08 | 2022-02-22 | 日立楼宇技术（广州）有限公司 | Power supply detection method, system, device, equipment and storage medium of elevator |
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