JP2016103933A - Vehicle power supply equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress an electromagnetic wave noise produced from a power cable for transmitting power from a power source to a power supply device, in vehicle power supply equipment having a movable power supply device.SOLUTION: A power supply device 280 includes a power transmission unit 120, a carriage 300 for loading the power transmission unit 120, and a power inverter circuit 330. The power transmission unit 120 engages with a power reception unit 500 and magnetically couples with the power reception unit 500, to transmit power to the power reception unit 500. The power inverter circuit 330 is loaded on the carriage 300, and transforms power received from a power source unit through a power cable 140 to output to the power transmission unit 120.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle power supply facility that supplies power to a stopped vehicle.

  Japanese Patent Laying-Open No. 2013-198187 (Patent Document 1) discloses a vehicle power supply device that can charge a battery of a vehicle with a power supply external to the vehicle. In this vehicle power supply device, a power supply coil is mounted on a self-propelled robot that can enter between the lower surface of the vehicle and the ground, and the power supply of the self-propelled robot is performed from a storage box that is fixed on the ground and can accommodate the self-propelled robot. Power is supplied to the coil via a power cable. When the battery is charged by the power supply outside the vehicle, the self-propelled robot is moved to a position facing the power receiving coil provided on the lower surface of the vehicle, and the power feeding coil is magnetically coupled with the power receiving coil to receive power from the power feeding coil. Is fed.

  According to this vehicle power supply device, it is possible to provide a vehicle power supply device that can be installed without requiring a large installation space or significant modification of existing facilities (see Patent Document 1).

JP 2013-198187 A JP-A-1-230326 JP 2006-288034 A

  When power is transmitted from the power supply coil to the power reception coil by magnetically coupling the power supply coil to the power reception coil, high-frequency AC power in the order of kilohertz or megahertz is supplied to the power supply coil. When such AC power flows through the power cable, the power cable can be a source (antenna) of electromagnetic noise. In particular, in a power supply facility using a self-running robot as described above, since the power cable becomes long, it is necessary to suppress electromagnetic wave noise output from the power cable as much as possible.

  The present invention has been made to solve such a problem, and an object of the present invention is to reduce electromagnetic wave noise generated from a power cable for power transmission from a power source to a power supply device in a vehicle power supply facility including a mobile power supply device. It is to suppress.

  According to the present invention, the vehicle power supply facility is a vehicle power supply facility that supplies power to a stopped vehicle, and includes a mobile power supply device, a power supply unit, and a power cable. The power feeding device is configured to move to a position close to a power receiving unit provided in the vehicle and to feed power to the power receiving unit. The power supply unit is provided outside the power supply apparatus. The power cable is for electrically connecting the power supply device to the power supply unit and transmitting power from the power supply unit to the power supply device. The power feeding device includes a power transmission unit, a carriage on which the power transmission unit is mounted, and a power conversion circuit. The power transmission unit is configured to transmit power to the power reception unit by being magnetically coupled to the power reception unit. The power conversion circuit is mounted on the carriage, converts power received from the power supply unit through the power cable, and outputs the converted power to the power transmission unit.

  By adopting such a configuration, the frequency of the AC power flowing in the power cable is suppressed, and power of a desired frequency is generated and supplied to the power transmission unit in the power conversion circuit mounted on the mobile power supply apparatus (cart). It becomes possible. Therefore, according to the vehicle power supply facility, electromagnetic noise generated from the power cable can be suppressed.

  Preferably, the power supply unit outputs AC power having the first frequency to the power cable. The power conversion circuit converts AC power received from the power cable into a second frequency higher than the first frequency and outputs the second frequency to the power transmission unit.

More preferably, the first frequency is a commercial power supply frequency.
By setting it as such a structure, the frequency of the alternating current power which flows into an electric power cable is suppressed to the 1st frequency (preferably commercial power supply frequency) lower than the 2nd frequency which is the power transmission frequency from a power transmission part. Therefore, according to the vehicle power supply facility, electromagnetic noise generated from the power cable can be suppressed.

  Preferably, the power feeding device further includes a cable reel configured to wind up the power cable.

  Although the power cable wound around the cable reel can also be a source of electromagnetic noise, in this vehicle power supply facility, the frequency of AC power flowing through the power cable is suppressed to the first frequency. Therefore, according to this vehicle power supply facility, electromagnetic wave noise generated from the power supply device (cable reel) can be suppressed.

  According to the present invention, in a vehicle power supply facility including a mobile power supply device, electromagnetic noise generated from a power cable or power supply device (cable reel) for transmitting power from the power source to the power supply device can be suppressed. Moreover, the copper loss by the harmonics generated from the power cable or the power feeding device (cable reel) is also reduced, and the generation of heat can be suppressed. As a result, it is possible to use a low-quality power cable.

1 is an overall configuration diagram of a power supply system to which a vehicle power supply facility according to an embodiment of the present invention is applied. It is the figure which showed the planar positional relationship of an electric power feeder and the receiving part of a vehicle. It is a side view which shows the structure of an electric power feeder roughly. It is a top view which shows the structure of an electric power feeder roughly. It is a block diagram which shows the vehicle power supply equipment and the detailed structure of a vehicle.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

(Overall configuration of power supply system)
FIG. 1 is an overall configuration diagram of a power supply system to which a vehicle power supply facility according to an embodiment of the present invention is applied. With reference to FIG. 1, the power supply system includes a vehicle power supply facility 10 and a vehicle 20. The vehicle power supply facility 10 includes a power supply device 100, a power cable 140, and a mobile power supply device 280.

  The power supply device 100 is fixed to the ground and supplies power (alternating current) to the mobile power supply device 280 through the power cable 140. As will be described in detail later, in this embodiment, power supply apparatus 100 outputs AC power having a commercial power frequency, and AC power at the commercial power frequency flows through power cable 140.

  The power cable 140 electrically connects the power supply apparatus 280 to the power supply apparatus 100 and transmits power from the power supply apparatus 100 to the power supply apparatus 280. Power cable 140 includes a signal line for performing communication between power supply apparatus 100 and power supply apparatus 280. Note that communication between the power supply apparatus 100 and the power supply apparatus 280 may be performed wirelessly.

  The power feeding device 280 receives power from the power supply device 100 through the power cable 140 and feeds power to the power receiving unit 500 (described later) of the vehicle 20. The power feeding device 280 is equipped with a power transmission unit 120 for transmitting power to the power receiving unit 500. In this embodiment, each of power transmission unit 120 and power reception unit 500 is configured by a coil, and power transmission unit 120 is brought close to (engaged) with power reception unit 500 to magnetically couple power transmission unit 120 and power reception unit 500. Thus, power is transmitted from the power transmitting unit 120 to the power receiving unit 500 in a non-contact manner.

  The power feeding device 280 is configured by a self-propelled robot, and the power transmission unit 120 is configured to be lifted by a lifting device (described later) on the carriage of the power feeding device 280. The power feeding device 280 enters the lower part of the vehicle 20 of the parked vehicle 20 and moves to a position facing the power receiving unit 500 as illustrated in FIG. 2, and raises the power transmitting unit 120 toward the power receiving unit 500 to transmit the power transmitting unit 120. Is engaged with the power receiving unit 500 to supply electric power from the power transmitting unit 120 to the power receiving unit 500.

  Vehicle 20 includes a power reception unit 500, a rectification unit 520, a power storage device 560, and a power generation device 600. The power receiving unit 500 is provided at the lower part of the vehicle 20. In this embodiment, as described above, the power receiving unit 500 is configured by a coil, and the power receiving unit 500 receives power from the power transmitting unit 120 by being magnetically coupled to the power transmitting unit 120 that is also configured by a coil, and rectifies. Output to the unit 520.

  Rectifying unit 520 rectifies the AC power received by power receiving unit 500 and outputs the rectified power to power storage device 560. The rectifying unit 520 is configured by a diode bridge circuit, for example. Power storage device 560 is a rechargeable DC power supply, and is constituted by a secondary battery such as a lithium ion battery or a nickel metal hydride battery, for example. The power storage device 560 stores power supplied from the power supply device 280 and also stores power generated by the power generation device 600. Then, power storage device 560 supplies the stored power to power generation device 600.

  Power generation device 600 generates a driving force for driving vehicle 20 using electric power stored in power storage device 560. Although not particularly illustrated, power generation device 600 includes, for example, an inverter that receives electric power from power storage device 560, a motor driven by the inverter, a drive wheel driven by the motor, and the like. Power generation device 600 may include a power generator for charging power storage device 560 and an engine capable of driving the power generator.

  In this power supply system, AC power is supplied from the power supply apparatus 100 to the power supply apparatus 280 through the power cable 140. The frequency of AC power output from the power supply apparatus 100 to the power cable 140 is a commercial power supply frequency. The AC power supplied to the power feeding device 280 through the power cable 140 is converted into AC power having a frequency (for example, kilohertz or megahertz order) higher than the commercial power supply frequency by a power conversion circuit (described later) mounted on the power feeding device 280. The power is converted and transmitted from the power transmitting unit 120 to the power receiving unit 500 of the vehicle 20 that is magnetically coupled to the power transmitting unit 120 in a contactless manner. By increasing the frequency of the power transmitted from the power transmission unit 120 to the power reception unit 500, the coils constituting the power transmission unit 120 and the power reception unit 500 can be reduced in size.

(Configuration of power supply device 280)
FIG. 3 is a side view schematically showing the configuration of the power feeding device 280. FIG. 4 is a plan view schematically showing the configuration of the power feeding device 280. Referring to FIGS. 3 and 4, power supply device 280 includes a carriage 300, a cable reel 310, a lifting device 320, a power transmission unit 120, and a power conversion circuit 330.

  The carriage 300 is equipped with the power transmission unit 120 and allows the power feeding device 280 to be moved by a driving device (not shown). The cable reel 310 is configured such that the power cable 140 can be appropriately drawn / wound according to the distance of the power feeding device 280 from the power supply device 100 (FIG. 1). The power cable 140 is discharged from the cable reel 310 in accordance with the movement of the power feeding device 280 from the standby position. In order to realize smooth discharge and stress-free of the power cable 140 accompanying the movement of the power supply device 280, the power supply device 280 synchronizes the discharge length of the power cable 140 with the moving distance of the power supply device 280 from the standby position. Move while.

  The lifting device 320 is configured to be able to lift the power transmission unit 120 on the carriage 300. As an example, the elevating device 320 includes a support member having a multistage structure that can be extended and contracted, and a motor (not shown) that drives expansion and contraction of the support member. In addition, the structure of the raising / lowering apparatus 320 is not restricted to such a thing, You may drive the power transmission part 120 up and down with a rack-type gearwheel. The elevating device 320 keeps the power transmission unit 120 lowered on the carriage 300 while the power feeding device 280 is moving, and stops at a position where the power feeding device 280 enters the lower body of the vehicle 20 and faces the power receiving unit 500. Thereafter, the power transmission unit 120 is raised toward the power reception unit 500.

  The power conversion circuit 330 is mounted on the carriage 300 (that is, the mobile power supply device 280), and is electrically connected between the terminal end of the power cable 140 wound around the cable reel 310 and the power transmission unit 120. Then, the power conversion circuit 330 converts AC power received from the power supply apparatus 100 (FIG. 1) through the power cable 140 into a frequency (for example, kilohertz or megahertz order) higher than the commercial power supply frequency, and outputs it to the power transmission unit 120.

  In the power feeding device 280, high-frequency alternating current power in the order of kilohertz or megahertz is supplied to the power transmission unit 120, and the power transmission unit 120 is magnetically coupled to the power reception unit 500 of the vehicle 20, whereby the power transmission unit 120 transfers to the power reception unit 500. Power is transmitted.

  Here, when such high-frequency AC power flows through the power cable 140, the power cable 140 can be a source (antenna) of electromagnetic noise. In particular, in the mobile power supply device 280 as described above, the power cable 140 becomes long, and therefore it is necessary to suppress electromagnetic wave noise output from the power cable 140 as much as possible.

  In view of this, in the vehicle power supply facility 10 according to this embodiment, the power conversion circuit 330 is mounted not on the power supply apparatus 100 but on the power supply apparatus 280 so that the AC power received from the power cable 140 is converted in the power supply apparatus 280. Thus, the frequency of the AC power flowing through the power cable 140 is suppressed. That is, AC power of commercial power frequency is output from the power supply device 100 to the power cable 140, and the AC power of commercial power frequency received from the power cable 140 by the power conversion circuit 330 mounted on the power feeding device 280 is in the order of kilohertz or megahertz. Is converted to AC power and supplied to the power transmission unit 120. With such a configuration, the frequency of the AC power flowing through the power cable 140 can be suppressed to the commercial power supply frequency, and high-frequency AC power on the order of kilohertz or megahertz can be supplied to the power transmission unit 120. Therefore, according to the vehicle power supply facility 10, electromagnetic wave noise generated from the power cable 140 can be suppressed. Moreover, the copper loss by the harmonics generated from the power cable 140 is also reduced, and the generation of heat can be suppressed. As a result, it is possible to use a low-quality power cable.

  In this power feeding system, the mobile power feeding device 280 enters the lower part of the vehicle 20 and moves to a position facing the power receiving unit 500 of the vehicle 20. Thereafter, the power transmission unit 120 is raised by the lifting device 320 on the carriage 300, the power transmission unit 120 engages with the power reception unit 500, and the power transmission unit 120 and the power reception unit 500 are magnetically coupled. Power is supplied to the power receiving unit 500.

  As described above, the power transmission unit 120 is lifted while the power feeding device 280 enters the lower part of the vehicle body, and power is transmitted to the power reception unit 500. Therefore, the power transmission unit 120 and the power conversion circuit 330 in which heat is concentrated are opened to the outside air. The power transmission unit 120 and the power conversion circuit 330 can be easily cooled. Moreover, electric power transmission can be performed in a place where the user does not touch carelessly (lower part of the vehicle body).

(Detailed configuration of vehicle power supply facility 10 and vehicle 20)
FIG. 5 is a block diagram showing detailed configurations of the vehicle power supply facility 10 and the vehicle 20. Referring to FIG. 5, in vehicle power supply facility 10, power supply device 100 includes a power supply unit 110 and a power supply ECU (Electronic Control Unit) 160.

  When power supply unit 110 is controlled by power supply ECU 160 and receives a power supply command from power supply ECU 160, AC power having a commercial power supply frequency is output to power cable 140. As an example, the power supply unit 110 receives electric power from a commercial system power supply (not shown), and turns on a relay (not shown) in accordance with a power supply command from the power supply ECU 160, thereby alternating current of commercial power supply frequency received from the commercial system power supply. Power is output to the power cable 140.

  The power supply ECU 160 includes a CPU (Central Processing Unit), a storage device, an input / output buffer, and the like (all not shown), and controls power transmission from the power transmission unit 120 to the power reception unit 500 of the vehicle 20. Specifically, when the power feeding device 280 moves to a position facing the power receiving unit 500 of the vehicle 20 and preparation for power transmission from the power transmitting unit 120 to the power receiving unit 500 is completed, the power supply ECU 160 transfers from the power source unit 110 to the power cable 140. A power supply command is output to the power supply unit 110 so as to output electric power.

  The power supply ECU 160 performs wireless communication with the vehicle 20 using the communication device 180 when power supply from the vehicle power supply facility 10 to the vehicle 20 is performed, information on the vehicle 20 (such as a parking position of the vehicle 20), and the like. Information such as the start / stop of power feeding and the power reception status of the vehicle 20 is exchanged with the vehicle 20. The power supply ECU 160 also communicates with a mobile ECU 200 (described later) mounted on the power supply device 280 to exchange information regarding the vehicle 20 and information regarding movement of the power supply device 280 (such as completion of movement to the target position). Information exchange between power supply ECU 160 and mobile ECU 200 is performed via power cable 140, but may be performed by wireless communication.

  Power feeding device 280 includes a cable reel 310, a power conversion circuit 330, a power transmission unit 120, a mobile ECU 200, a light receiving unit 220, a driving device 260, and a lifting device 320. The power conversion circuit 330 is provided on a power line between the cable reel 310 and the power transmission unit 120 and includes, for example, a rectification unit 332 and an inverter 334.

  That is, rectification unit 332 rectifies AC power of commercial power frequency received from power supply unit 110 through power cable 140 and outputs the AC power to inverter 334. The rectifying unit 332 is configured by a diode bridge circuit, for example. The inverter 334 converts the DC power received from the rectifying unit 332 into AC power having a frequency (for example, kilohertz or megahertz order) higher than the commercial power supply frequency, and supplies the AC power to the power transmission unit 120. Inverter 334 is formed of, for example, a single-phase full bridge circuit.

  The mobile ECU 200 includes a CPU, a storage device, an input / output buffer, and the like (all not shown), and controls the movement of the power feeding device 280, the lifting / lowering of the power transmission unit 120 by the lifting / lowering device 320, and the power conversion by the power conversion circuit 330. .

  Specifically, the mobile ECU 200 receives information about the vehicle 20 from the power supply ECU 160 and recognizes the vehicle 20 stopped at the parking position. Then, mobile ECU 200 detects the relative positional relationship between power transmission unit 120 and power reception unit 500 based on a detection signal from light receiving unit 220 for performing alignment between power transmission unit 120 and power reception unit 500 of vehicle 20. The movement of the power feeding device 280 is controlled such that the power feeding device 280 is disposed at a position where the power transmission unit 120 faces the power receiving unit 500.

  When the movement of the power feeding device 280 is completed, the movement ECU 200 raises the power transmission unit 120 by controlling the lifting device 320. Then, when power transmission unit 120 is engaged with power reception unit 500 of vehicle 20 and power supply start command is output from power supply ECU 160 to mobile ECU 200, mobile ECU 200 outputs a drive command to inverter 334 of power conversion circuit 330. Thus, power is supplied from inverter 334 to power transmission unit 120, and power is transmitted from power transmission unit 120 to power reception unit 500 of vehicle 20.

  The light receiving unit 220 is a sensor for receiving light output from a light emitting unit 660 (described later) provided in the vehicle 20. The light receiving unit 220 is configured by, for example, an omnidirectional camera that can detect infrared rays output from the light emitting unit 660, and the direction of the light emitting unit 660 relative to the power feeding device 280 is detected based on the detection result of the light receiving unit 220.

  The lifting device 320 is a device for raising the power transmission unit 120 on the carriage 300 (FIG. 3), and the details are as described in FIG. 3. The driving device 260 includes various mechanisms for enabling the power feeding device 280 to move. Specifically, drive device 260 includes a traveling wheel and a motor for driving the traveling wheel. As the traveling wheel, for example, an omni wheel (registered trademark) or a Mecanum wheel that can move in all directions can be used.

  In addition to the power receiving unit 500, the rectifying unit 520, the power storage device 560, and the power generation device 600 shown in FIG. 1, the vehicle 20 includes a charging relay 540, a system main relay (SMR) 580, a vehicle ECU 620, and a communication device 640. Further included.

  The vehicle ECU 620 includes a CPU, a storage device, an input / output buffer, etc. (all not shown), inputs signals from various sensors and outputs control signals to each device, and controls each device in the vehicle 20. To do. As an example, vehicle ECU 620 executes charge control for power storage device 560 and travel control for vehicle 20.

  Further, when the power receiving unit 500 and the power transmission unit 120 of the vehicle power supply facility 10 are aligned, the vehicle ECU 620 causes the light emitting unit 660 to emit light in accordance with a command from the vehicle power supply facility 10 received by the communication device 640. . The light emitting unit 660 is disposed in the vicinity of the power receiving unit 500. For example, the light emitting unit 660 emits infrared light that can be received by the light receiving unit 220 of the vehicle power supply facility 10 in all directions.

  In addition, alignment with the power transmission part 120 and the power receiving part 500 is not restricted to the above methods using infrared rays. For example, the relative positional relationship between the power transmission unit 120 and the power reception unit 500 may be detected by mounting a radial or rotary laser transmitter on the power supply device 280 and receiving the reflected light by the power supply device 280. Alternatively, the relative position relationship between the power transmission unit 120 and the power reception unit 500 may be detected by mounting an ultrasonic transmitter on the vehicle 20 and receiving the transmitted ultrasonic wave with the power feeding device 280.

  Charging relay 540 is turned on by vehicle ECU 620 when power storage device 560 is charged by vehicle power supply facility 10. SMR 580 is turned on by vehicle ECU 620 when activation of power generation device 600 is requested.

  The vehicle ECU 620 communicates with the vehicle power supply facility 10 using the communication device 640 when power supply from the vehicle power supply facility 10 to the vehicle 20 is performed, and information related to the vehicle 20 (such as a parking position of the vehicle 20). In addition, information such as the start / stop of power supply and the power reception status of the vehicle 20 is exchanged with the vehicle power supply facility 10.

  As described above, according to this embodiment, the frequency of the AC power flowing through the power cable 140 is suppressed to the commercial power supply frequency, and high-frequency AC power of the kilohertz or megahertz order is supplied to the power transmission unit 120. it can. Therefore, according to this embodiment, electromagnetic wave noise generated from power cable 140 can be suppressed.

  In this embodiment, the cable reel 310 is mounted on the power supply device 280, and the power cable 140 wound around the cable reel 310 can also be a source of electromagnetic noise. In this embodiment, The frequency of the AC power flowing through the power cable 140 is suppressed to the commercial power frequency. Therefore, according to this embodiment, electromagnetic wave noise generated from the power feeding device 280 (the power cable 140 wound around the cable reel 310) can be suppressed. In addition, copper loss due to harmonics generated from the power cable 140 and the power feeding device 280 (cable reel 310) is reduced, and heat generation can be suppressed. As a result, it is possible to use a low-quality power cable.

  In this embodiment, since the power transmission unit 120 is raised and power is transmitted to the power reception unit 500 in a state where the power feeding device 280 enters the lower part of the vehicle body, the power transmission unit 120 and the power conversion circuit 330 in which heat concentrates are performed. Is opened to the outside air, and cooling of the power transmission unit 120 and the power conversion circuit 330 is facilitated. Moreover, electric power transmission can be performed in a place where the user does not touch carelessly (lower part of the vehicle body).

  In the above embodiment, the frequency of the AC power output from the power supply unit 110 of the power supply apparatus 100 to the power cable 140 is the commercial power supply frequency, but the AC power output from the power supply unit 110 to the power cable 140 is the same. However, the frequency is not limited to this. When the frequency of the AC power flowing through the power cable 140 is a high frequency of the order of kilohertz or megahertz, electromagnetic noise from the power cable 140 becomes a problem. The frequency of the AC power output from the power supply unit 110 to the power cable 140 is Any low frequency (an example of which is the above-described commercial power supply frequency) may be used as long as such electromagnetic noise is not a problem.

  In the above embodiment, the cable reel 310 is mounted on the power supply device 280, but may be provided on the power supply device 100 (FIG. 1). Accordingly, the power feeding device 280 that is a moving body can be reduced in weight and size.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

  DESCRIPTION OF SYMBOLS 10 Vehicle power supply equipment, 20 Vehicle, 100 Power supply device, 110 Power supply unit, 120 Power transmission unit, 140 Power cable, 160 Power supply ECU, 180,640 Communication device, 200 Mobile ECU, 220 Light receiving unit, 260 Drive device, 280 Power supply device, 300 trolley, 310 cable reel, 320 lifting device, 330 power conversion circuit, 332, 520 rectifier, 334 inverter, 500 power receiver, 540 charging relay, 560 power storage device, 580 SMR, 600 power generator, 620 vehicle ECU, 660 Light emitting part.

Claims (4)

A vehicle power supply facility that supplies power to a stopped vehicle,
A mobile power supply device configured to move to a position close to a power reception unit provided in the vehicle and to supply power to the power reception unit;
A power supply unit provided outside the power supply device;
The power supply device is electrically connected to the power supply unit, and includes a power cable for transmitting power from the power supply unit to the power supply device,
The power supply device
A power transmission unit configured to transmit power to the power reception unit by being magnetically coupled to the power reception unit;
A carriage carrying the power transmission unit;
A vehicle power supply facility, comprising: a power conversion circuit that is mounted on the carriage and converts power received from the power supply unit through the power cable and outputs the power to the power transmission unit. The power supply unit outputs AC power having a first frequency to the power cable,
The vehicle power supply facility according to claim 1, wherein the power conversion circuit converts the AC power received from the power cable into a second frequency higher than the first frequency and outputs the second frequency to the power transmission unit.   The vehicle power supply facility according to claim 2, wherein the first frequency is a commercial power supply frequency.   The vehicle power supply facility according to any one of claims 1 to 3, wherein the power supply device further includes a cable reel configured to be capable of winding the power cable.

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