Elevator car power supply system and power supply method thereof

Abstract

The present invention provides an elevator car power supply system and a power supply method thereof. The system includes: a level controller installed inside an elevator control cabinet, a power transmission component installed in an elevator shaft, a power receiving component installed on the top of the car and electrically connected to the power transmission component, a power storage component installed on the top of the car and electrically connected to the power receiving component, and a voltage conversion component installed on the top of the car and electrically connected to the power storage component. The present invention utilizes a high-power power receiving component and a high-efficiency power storage component to charge the power storage component during each operation interval or operation of the car, so that when the elevator runs next time, only the power of the power storage component can be used to supply electricity to the car, which can greatly save the number of cores of the accompanying cable and reduce the cost of the elevator and the accompanying cable.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator operation, and in particular to an elevator car power supply system and a power supply method thereof. Background Art

[0002] In the existing elevator car power supply system, various voltage levels of power are required to maintain the normal operation of various electrical components in the car. For example, the power supply voltage levels required by electrical components such as car lighting, calling, and door motors are different. All voltage levels of power are transmitted from the machine room power supply to the top of the car through the elevator accompanying cable. When the number of electrical components in the car or on the top of the car increases, it is necessary to increase the number of power cores of the accompanying cable.

[0003] With the continuous development of elevator products, the number of floors in buildings and the height of elevators are also increasing, and the number of electrical components in the car or on the top of the car will also increase. In order to meet the increasing power demand of the car, the number of power cores of the accompanying cable must be continuously increased, which will inevitably increase the weight of the accompanying cable, resulting in an increase in the weight of the entire elevator system, and the cost of the elevator and the accompanying cable will also increase accordingly.

[0004] At the same time, with the continuous development of elevator technology, ordinary signals between the elevator room and the car can be transmitted through wireless communication, but the power supply method of the accompanying cable of the car restricts the advancement of the wirelessization of the car.

[0005] Therefore, how to reduce the number of cores of the accompanying cable or even cancel the accompanying cable, reduce the cost of elevators and accompanying cables, and promote the wirelessization of elevator cars has become a technical problem that needs to be urgently solved in the development of elevator car power supply. Summary of the invention

[0006] The purpose of the present invention is to provide an elevator car power supply system and a power supply method thereof, in order to solve the technical problems existing in the prior art, so as to significantly save the core of the accompanying cable and reduce the cost of the elevator and the accompanying cable.

[0007] To achieve the above-mentioned purpose, the present invention provides an elevator car power supply system, including: a level controller, installed inside an elevator control cabinet, for receiving an external power supply and converting it into at least one power supply; a power transmission component, installed in an elevator shaft, electrically connected to the level controller and extending to the bottom of the elevator shaft, for transmitting the power supply; a power receiving component, installed on the top of the car and electrically connected to the power transmission component, for receiving the power supply; a power storage component, installed on the top of the car and electrically connected to the power receiving component, for storing the power supply; a voltage conversion component, installed on the top of the car and electrically connected to the power storage component, for converting the power stored in the power storage component into a car power supply of the corresponding voltage level required by different electrical components of the car, and supplying power.

[0008] To achieve the above-mentioned object, the present invention also provides an elevator car power supply method, which adopts the elevator car power supply system of the present invention, and the method comprises the following steps: (1) receiving an external power supply through a level controller and converting it into at least one power supply; (2) transmitting the power supply through a power transmission component; (3) receiving the power supply through a power receiving component; (4) storing the power supply through a power storage component; (5) converting the power stored in the power storage component into a car power supply of the corresponding voltage level required by different electrical components of the car through a voltage conversion component, and supplying power.

[0009] The advantages of the present invention are: the present invention utilizes a high-power power receiving component and a high-efficiency power storage component to charge the power storage component during each operation interval or operation of the car, so that when the elevator runs next time, the car can be supplied with electricity only by the power of the power storage component. The present invention can greatly save the number of cores of the accompanying cable, and even eliminate the accompanying cable, thereby reducing the cost of the elevator and the accompanying cable. The present invention can also cooperate with wireless communication technology to completely remove the accompanying cable and promote the wirelessization of the elevator car. Compared with the existing wireless charging technology, the present invention has high charging efficiency and low cost, which meets the use occasions of high-power electricity consumption in the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 , a schematic diagram of the architecture of the elevator car power supply system of the present invention;

[0012] Figure 2, a schematic diagram of a first embodiment of an elevator car power supply system of the present invention;

[0013] Figure 3A , a schematic diagram of a second embodiment of an elevator car power supply system of the present invention;

[0014] Figure 3B , a cross-sectional view of the installation position of the collector shoe and the power supply rail of the present invention from a top view;

[0015] Figure 4 , a schematic diagram of the flow chart of the elevator car power supply method of the present invention. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention. The terms "first", "second", "third", etc. (if any) in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the objects described in this way can be interchanged where appropriate. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0017] See also Figure 1 , a schematic diagram of the structure of the elevator car power supply system of the present invention. The elevator car power supply system comprises: a level controller 11, a power transmission component 12, a power receiving component 13, a power storage component 14 and a voltage conversion component 15.

[0018] Specifically, the level controller 11 is installed in the elevator control cabinet 201 (marked at Figure 2 The main function of the level controller 11 is to convert AC power from the city grid into DC power, or to use DC power from the DC bus, and transmit it together with the converted AC power through the power transmission component 12 as the main source of power for the car. The power types output by the level controller 11 include but are not limited to AC220V, DC48V, etc. The level controller 11 includes but is not limited to: analog level conversion devices and digital level conversion devices, which can realize the conversion of one power supply into one or more different power supplies.

[0019] In a further embodiment, at least one of an overcurrent detection protection unit, a short circuit detection protection unit or a leakage detection protection unit is provided inside the level controller 11, which is used to cut off the power output of the level controller 11 when a corresponding abnormality is detected, and output a fault signal to the elevator main control board. That is, the level controller 11 is provided with overcurrent, short circuit, and leakage detection and protection functions, and can cut off the power supply when an abnormality occurs to ensure the safety of equipment and personnel. For example, an overcurrent detection protection unit can be provided inside the level controller 11. When a power supply exceeding the rated current passes through the level controller 11, the level controller 11 will cut off the output to ensure the safety of the back-end equipment; the level controller 11 can also be provided with a leakage detection protection unit at the same time. When the leakage current exceeds the set value during the operation of the level controller 11, the output will be cut off immediately and the work will stop; the above-mentioned abnormal detection protection units can output fault signals to the elevator main control board, so that the monitoring personnel can know whether the level controller 11 is in a normal working state or an abnormal fault state.

[0020] Specifically, the power transmission assembly 12 is installed in the elevator shaft 202 (marked at Figure 2 ), electrically connected to the level controller 11 and extending to the bottom of the elevator shaft 202, for transmitting the power supply. The power transmission component 12 extends from the elevator control cabinet 201 to the bottom of the elevator shaft 202, running through the entire shaft, and its main function is to transmit the power provided by the level controller 11 to the downstream, that is, it mainly plays the role of power transmission.

[0021] In a further embodiment, the power transmission component 12 may use a power supply line 221 (indicated at Figure 2 ), the power supply line 221 is at each stop floor station 209 (marked at Figure 2 A branch line is separated out, each of which is electrically connected to a power supply connector 222 (indicated at Figure 2); when the power supply connector 222 on a branch line is electrically connected to the power receiving component 13, the power supply on the power supply line 221 is transmitted to the power receiving component 13 through the corresponding power supply connector 222. That is, the power supply line 221 is used in conjunction with the power supply connectors 222 of each landing station 209 in the elevator shaft 202, and continuously provides stable power to the power receiving component 13 through the corresponding power supply connector 222. Among them, the power supply line 221 is generally a multi-core power line, and the type of power in the power supply line 221 is consistent with the type of power output by the level controller 12. The power supply connector 222 can be set in an open access mode, which can be conveniently connected to the power receiving component 13 set on the car, and the power supply connector 222 can also be set to extend when the car stops. When the elevator stops at the landing station 209, the power receiving component 13 can be reliably in contact with the corresponding power supply connector 222; when the elevator is running, the power receiving component 13 is out of contact or briefly in contact with the power supply connector 22 in the shaft. Therefore, each power supply connector 222 can detect in real time whether it is reliably in contact with the power receiving component 13. If it is reliably connected, the corresponding power supply connector 222 can output the power on the power supply line 221; otherwise, the power supply connector 222 is in a power-free safety state and will not output any power. That is, even if the power receiving component 13 is in short contact with the power supply connector 22 in the well, it will not receive power from the power supply connector 222, avoiding a short-term power shock.

[0022] In a further embodiment, the power transmission component 12 may adopt a power supply rail 32 (marked in FIG3 ), and the power receiving component 13 is always in reliable contact with the power supply rail 22. At this time, whether the elevator car is parked at the landing station 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 time and any position. The power supply rail 32 is generally a rigid live rail, the exposed part of the rail maintains a safe insulation distance from the wall and the shaft components, and an insulating protective shell is provided outside the contact surface with the power receiving component 13.

[0023] Specifically, the power receiving assembly 13 is installed in the car 203 (marked at Figure 2 The top of the power transmission component 12 is electrically connected to receive the power supply.

[0024] In a further embodiment, the power receiving component 13 may adopt a collector 23 (indicated at Figure 2), matching the power supply connector 222 with the power supply line 221. When the elevator stops at the landing station 209, the power supply connector 222 is reliably in contact with the collector 23, so that a large current is supplied to the collector 23. When the elevator is running, the collector 23 is out of contact with the power supply connector 222 in the hoistway or is in short contact, and no power transmission is performed, so as to avoid a short-term power impact on the collector 23.

[0025] In a further embodiment, the power receiving assembly 13 may use a collector shoe 33 (shown in FIG. 3 ) to cooperate with the power supply rail 32. The collector shoe 33 is always in reliable contact with the power supply rail 32, and the elevator can obtain high-voltage power at any time and any position. The collector shoe, also known as the current extraction shoe, is a collector device that obtains electrical energy by contacting the power supply rail.

[0026] Specifically, the power storage component 14 is installed on the top of the car 203 and is electrically connected to the power receiving component 13, and is used to store the power supply. The power storage component 14 can be a large-capacity lithium battery or a high-efficiency supercapacitor, and its main function is to store the electric energy obtained by the power receiving component 13. When the power supply is high voltage and high current, the power storage component 14 will be charged to store electric energy; and when the stored electric energy is released, a low voltage and low current method is adopted to ensure sufficient power margin.

[0027] Specifically, the voltage conversion component 15 is installed on the top of the car 203 and is electrically connected to the power storage component 14, and is used to convert the power stored in the power storage component 14 into a car power supply of the corresponding voltage level required by different electrical components of the car, and supply power. Since the voltage levels required by the various electrical components of the car are not exactly the same, the voltage conversion component 15 will convert the power supply stored in the power storage component 14 according to the actual conditions of the electrical components of different voltage levels, output stable and safe power of different voltage levels, and fully supply power to the lighting, fan, call button and other electrical components in the car, as well as to the door motor, car controller and other electrical components on the top of the car. The voltage conversion component 15 includes but is not limited to: analog voltage conversion devices (such as voltage level converters) and digital voltage conversion devices (such as voltage converters with integrated logic functions), which can realize the conversion of one power supply into one or more different power supplies.

[0028] In a further embodiment, the voltage conversion component 15 is further electrically connected to the power receiving component 13; when the elevator is on standby at the landing station 209, the voltage conversion component 15 is further used to switch the power supply state, convert the power supply received by the power receiving component 13 into a car power supply of the corresponding voltage level required by different electrical components of the car, and supply power. That is, when the elevator is on standby at the landing station 209, the power storage component 14 will store the power provided by the level controller 11, and at the same time, the voltage conversion component 15 will also switch the power supply state, so that all electrical components of the car system directly use the power received from the power receiving component 13, instead of using the electric energy stored in the power storage component 14, thereby ensuring the storage capacity and power supply endurance of the power storage component.

[0029] The elevator car power supply system of the present invention utilizes a high-power power receiving component and a high-efficiency power storage component to charge the power storage component during each operation interval or operation of the car, so that when the elevator runs next time, the car can be supplied with electricity only by the power of the power storage component. The present invention can greatly save the number of cores of the elevator accompanying cable, and even eliminate the accompanying cable, thereby reducing the cost of the elevator and the accompanying cable. The present invention can also cooperate with wireless communication technology to completely remove the accompanying cable and promote the wirelessization of the elevator car. Compared with the existing wireless charging technology, the present invention has high charging efficiency and low cost, which meets the use occasions of high-power electricity consumption in the car.

[0030] See also Figure 2 , a schematic diagram of a first embodiment of an elevator car power supply system of the present invention. 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 collector 23, a power storage component 14 and a voltage conversion component 15.

[0031] The level controller 11 is installed in the elevator control cabinet 201, and its front end is electrically connected to the AC power (AC220V) of the city grid. The AC power is converted by internal voltage to generate DC48V, AC110V and AC22V power supplies, which are output from its back end. The level controller 11 has an overcurrent detection protection function. When a power supply exceeding the rated current passes through, the output will be cut off to ensure the safety of the back-end equipment; the level controller 11 also has a leakage detection protection function. When the leakage current exceeds the set value during its operation, the output will be cut off immediately and the work will stop. The above abnormal detection protection can output a fault signal to the elevator main control panel, so that the monitoring personnel can know whether the level controller 11 is in a normal working state or an abnormal fault state.

[0032] The power supply line 221 is electrically connected to the level controller 11, and the multi-channel power output by the level controller 11 is transmitted through the power supply line. The power supply line 221 extends from the elevator control cabinet 201 in the machine room to the bottom of the elevator shaft 202, and runs through the entire shaft. The type of power in the power supply line 221 is consistent with the type of power output by the level controller 11. If there are N landing stations 209 outside the customer elevator hall, the power supply line 221 branches out a branch line at each landing station 209, with a total of N branch lines. A power supply connector 222 is installed at the rear end of each branch line, with a total of N power supply connectors 222. The power supply connector 222 can be open in and out, and can be conveniently connected to the collector 23 installed on the car 203. Each power supply connector 222 will detect in real time whether it is reliably connected to the collector 23. If it is reliably connected, the corresponding power supply connector 222 can output the power on the power supply line 221; otherwise, the power supply connector 222 is in a power-free safety state and will not output any power.

[0033] The collector 23 is installed on the top of the car 203 to receive the power supply. The collector 23 can be fixed and electrically connected to the corresponding power connector 222 after the elevator stops at the landing station 209 to receive the power supply through the power connector 222; when the elevator is running, even if the collector 23 contacts a certain power connector 222, the collector 23 will not receive power from the corresponding power connector 222 because the contact time is short, thereby avoiding a short-term power shock. The collector can also be retractable, in an extended state after the elevator stops at the landing station 209, and electrically connected to the corresponding power connector 222 to receive the power supply through the power connector 222; in a retracted state when the elevator is running, it never contacts any power connector 222, and no power transmission occurs.

[0034] The power storage component 14 is also installed on the top of the car 203 and is electrically connected to the collector 23. The power storage component 14 will store the electric energy obtained by the collector 23 after the collector 23 receives the power transmitted from the power supply connector 222. The energy storage medium of the power storage component 14 can be a large-capacity lithium battery or a high-efficiency supercapacitor. When the power supply is high voltage and high current, the power storage component 14 will be charged to store electric energy; when the stored electric energy is released, a low voltage and low current method is adopted to ensure sufficient power margin.

[0035] The voltage conversion component 15 is also installed on the top of the car 203 and is electrically connected to the power storage component 14. Since the voltage levels required by the various electrical components of the car are not exactly the same, the voltage conversion component 15 will convert the power supply stored in the power storage component 14 according to the actual conditions of the electrical components of different voltage levels, output stable and safe power of different voltage levels, and fully supply power to the electrical components such as lighting, fans, call buttons in the car, and to the electrical components such as door motors and car controllers on the top of the car.

[0036] The voltage conversion component 15 is further electrically connected to the collector 23; when the elevator stops at the landing station 209 and is on standby, the voltage conversion component 15 is further used to switch the power supply state, convert the power supply received by the collector 23 into a car power supply of the corresponding voltage level required by different electrical components of the car, and supply power. That is, when the elevator stops at the landing station 209 and is on standby, the power storage component 14 will store the power provided by the level controller 11, and at the same time, the voltage conversion component 15 will also switch the power supply state, so that all electrical components of the car system directly use the power received from the collector 23, instead of using the electric energy stored in the power storage component 14, thereby ensuring the storage capacity and power supply endurance of the power storage component.

[0037] Please also read Figure 3A-3B ,in, Figure 3A is a schematic diagram of a second embodiment of the elevator car power supply system of the present invention, Figure 3B It is a cross-sectional view of the installation position of the collector shoe and the power supply rail of the present invention from a top view. Figure 2 The difference between the illustrated embodiment is that, in this embodiment, the power transmission component 12 adopts a power supply rail 32 , and the power receiving component 13 adopts a collector shoe 33 .

[0038] like Figure 3A As shown, the power supply rail 32 is directly connected to the level controller 11, and is used to transmit the power output by the level controller 11. The power supply rail 32 is a rigid electrified rail, extending from the elevator control cabinet 201 in the machine room to the bottom of the elevator shaft 202, and running through the entire shaft. The power supply rail 32 can continuously provide power to the car, and provide a continuous supply of power to the power storage component 14 to a greater extent.

[0039] The collector shoe 33 is installed on the top of the car 203. The collector shoe 33 is always in reliable contact with the power supply rail 32 to receive the power supply. When the collector shoe 33 receives the power from the level controller 11, the acquired electric energy is stored in the power storage component 14. Whether the elevator car is parked at the parking floor station 209 or in operation, the collector shoe 33 is always in reliable contact with the power supply rail 32, and the elevator can obtain high-voltage power at any time and any position.

[0040] like Figure 3B As shown, in a top view, the power supply rail 32 has a first side surface 321 and an opposite second side surface 322; an insulating shell 323 is provided on the first side surface 321, and the collector shoe 33 contacts the power supply rail 32 through an opening on the insulating shell 323; an insulating terminal 324 extends from the second side surface 322 to maintain an insulation distance from the wall and shaft components in the elevator shaft 202; the first part 331 of the collector shoe 33 located in the opening area of ​​the insulating shell 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 inner wall 301 of the elevator shaft 202 through the insulating terminal 324, so that the exposed part 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 partially led outward from the power supply rail 32 and is surrounded by an insulating sheath 333. The exteriors of the power supply rail 32 and the collector shoe 33 are both insulated to avoid short circuits caused by abnormal contact of other components.

[0041] In a further embodiment, the collector shoe 33 has a second portion 332 in contact with the power supply rail 32, and a clamping structure 334 is provided between the second portion 332 and the insulating shell 323, and the clamping structure 334 is used to adjust the 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 clamping structure 334, even if the power supply rail 32 is slightly deformed, the collector shoe 33 can be ensured to be in reliable contact with the power supply rail 32 to prevent loosening.

[0042] Based on the same inventive concept, the present invention also provides an elevator car power supply method, which adopts the above-mentioned elevator car power supply system of the present invention.

[0043] Please also read Figure 4 as well as Figure 1 ,in, Figure 4The flowchart of the method for powering the elevator car of the present invention is shown in FIG. 1 . The method comprises the following steps: S41: receiving an external power source through a level controller and converting it into at least one power supply; S42: transmitting the power supply through a power transmission component; S43: receiving the power supply through a power receiving component; S44: storing the power supply through a power storage component; and S45: converting the power stored in the power storage component into a car power supply of a corresponding voltage level required by different electrical components of the car through a voltage conversion component, and supplying power. The structure, function and beneficial effects of the present invention have been described in detail in the literature. Figure 1 The elevator car power supply system has been described in detail and will not be repeated here.

[0044] Preferably, the voltage conversion component is further electrically connected to the power receiving component; step S45 further includes: when the elevator is on standby at the stop floor station 209, the power supply state is switched by the voltage conversion component, the power supply received by the power receiving component is converted into a car power supply of the corresponding voltage level required by different electrical components of the car, and power is supplied.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An elevator car power supply system, characterized in that: include: The level controller is installed inside the elevator control cabinet and is used to receive external power and convert it into at least one power supply; A power transmission assembly, installed in the elevator shaft, electrically connected to the level controller and extending to the bottom of the elevator shaft, for transmitting the power supply; A power receiving component, mounted on the top of the car and electrically connected to the power transmission component, for receiving the power supply; A power storage component, mounted on the top of the car and electrically connected to the power receiving component, for storing the power supply; A voltage conversion component is installed on the top of the car and is electrically connected to the power storage component, and is used to convert the power stored in the power storage component into a car power supply of a corresponding voltage level required by different electrical components of the car, and supply power; the power transmission component adopts a power supply rail, and the power receiving component adopts a collector shoe; the collector shoe contacts the power supply rail to receive the power supply through the power supply rail; The power supply rail has a first side surface and an opposite second side surface; an insulating shell is provided on the first side surface, and the collector shoe contacts the power supply rail through an opening on the insulating shell; an insulating terminal extends from the second side surface to maintain an insulating distance from the walls and shaft components in the elevator shaft; the first part of the collector shoe located in the opening area on the insulating shell is covered with an insulating sheath.

2. The system according to claim 1, characterized in that The level controller is internally provided with at least one of an overcurrent detection protection unit, a short circuit detection protection unit or a leakage detection protection unit, which is used to cut off the power output of the level controller when a corresponding abnormality is detected, and output a fault signal to the elevator main control board.

3. The system according to claim 1, characterized in that The power transmission component adopts a power supply line, the power supply line branches out a branch line at each stop level, each branch line is electrically connected to a power supply connector, and the power receiving component adopts a collector; When the current collector is electrically connected to the corresponding power supply connector, the power supply connector outputs the power supply on the power supply line to the current collector.

4. The system according to claim 3, characterized in that The current collector is fixed and is electrically connected to a corresponding power supply connector after the elevator stops at a landing station, so as to receive the power supply through the power supply connector; or The collector is in a retractable form, and is in an extended state after the elevator stops at a landing station, and is electrically connected to a corresponding power supply connector to receive the power supply through the power supply connector, and is in a retracted state when the elevator is running.

5. The system according to claim 1, characterized in that The collector shoe has a second part in contact with the power supply rail, and a clamping structure is provided between the second part and the insulating shell, and the clamping structure is used to adjust the contact force between the collector shoe and the power supply rail.

6. The system according to claim 1, characterized in that The voltage conversion component is further electrically connected to the power receiving component; When the elevator is on standby at a landing station, the voltage conversion component is further used to switch the power supply state, convert the power supply received by the power receiving component into a car power supply of the corresponding voltage level required by different electrical components of the car, and supply power.

7. A method for powering an elevator car, characterized in that: Using the elevator car power supply system according to claim 1, the method comprises the following steps: (1) receiving external power through a level controller and converting it into at least one power supply; (2) transmitting the power supply through a power transmission component; (3) receiving the power supply through a power receiving component; (4) storing the power supply via a power storage component; (5) The power stored in the power storage component is converted into a car power supply of a corresponding voltage level required by different electrical components of the car through a voltage conversion component, and then supplied.

8. The method according to claim 7, wherein the voltage conversion component is further electrically connected to the power receiving component; It is characterized in that Step (5) further includes: when the elevator is on standby at a landing station, the power supply state is switched by the voltage conversion component, the power supply received by the power receiving component is converted into a car power supply of the corresponding voltage level required by different electrical components of the car, and power is supplied.

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