Wireless power supply system, program, control method for wireless power supply system, power transmission device, and control method for power transmission device

Abstract

A wireless power supply system acquires transmitted power associated with vehicle ID information of a target vehicle of power supply, and　received power associated with the vehicle ID information of the target vehicle of power supply, and　determines whether the acquired transmitted power and the acquired received power in the vehicle identified by the same ID information are in a same level. A power-transmitter control unit (70) of the wireless power supply system (a) acquires the vehicle ID information of the target vehicle in which the transmitted power and the received power are not in the same level, and (b) stops energization to a power-transmitter coil (22) based on the acquired information even in case of determining that there is a power supply request of the target vehicle.

Description

WIRELESS POWER SUPPLY SYSTEM, PROGRAM, CONTROL METHOD FOR WIRELESS POWER SUPPLY SYSTEM, POWER TRANSMISSION DEVICE, AND CONTROL METHOD FOR POWER TRANSMISSION DEVICECross Reference

[0001] The present application is based on and claims the benefit of priority of Japanese Patent Application No. 2024-208029, filed on November 29, 2024, the disclosure of which is incorporated herein by reference.

[0002] The present disclosure relates to a wireless power supply system, a program, a control method for a wireless power supply system, a power transmission device, and a control method for a power transmission device.

[0003] Patent Literature 1 discloses a system for performing wireless power supply from a power transmitter on a ground to a power receiver installed in an electric vehicle. The power transmitter includes a power-transmitter coil and a controller that energizes the power-transmitter coil. The power receiver includes a power-receiver coil that is supplied with electric power in a wirelessing manner from the power-transmitter coil.

[0004] The power transmitter and the power receiver include communication antenna for short-range wireless communication. The power receiver supplies a power supply request signal to a power-receiver communication antenna of the power receiver. The power transmitter determines whether there is a power supply request based on an output signal from a power-transmitter communication antenna of the power transmitter. When the power transmitter determines that there is a power supply request, the power transmitter energizes the power-transmitter coil. On the other hand, when it is determined that there is no power supply request, the power transmitter stops energization of the power transmitting coil.

[0005] JP2024-8088A

[0006] An intensity of the power supply request signal supplied to the power-receiver communication antenna may become excessively large, and a communication range of the power supply request signal transmitted from the vehicle may excessively extend. In such case, there is a concern that energization control for the power-transmitter coil may not be performed appropriately.

[0007] For example, if there is another vehicle in the proximity of a vehicle (hereinafter, a target vehicle) whose communication range has been overextended, power transmission to a power-transmitter coil near the other vehicle may begin. In such case, if a relative positional relationship between the power-receiver coil of the other vehicle and the power-transmitter coil near the other vehicle deviates from an appropriate positional relationship for wireless power supply, a magnetic field from the power-transmitter coil may act on vehicle parts that would not otherwise be affected, i.e., when appropriately positioned. For example, the vehicle part may be a part around a wheel (for example, a sensor or an actuator). In such case, there is a risk that vehicle parts affected by the magnetic field may malfunction.

[0008] Further, issues can occur even when, for example, there are no other vehicles in a proximity of the target vehicle. Specifically, when a power supply request signal is transmitted from a target vehicle, not only power-transmitter coils in the proximity of the target vehicle but also power-transmitter coils distant from the target vehicle may be energized. In such case, there is a concern that electric power is wasted, and / or leakage magnetic field increases.

[0009] It Is a primary object of the present disclosure to provide a wireless power supply system, a program, a control method for the wireless power supply system, a power transmitter, and a control method for the power transmitter, which are capable of appropriately controlling energization to a power transmitter antenna.

[0010] According to the present disclosure, a wireless power supply system comprises: a power transmitter device including a power transmitter antenna; and a power receiver device to be mounted on a vehicle and including a power receiver antenna. The wireless power supply system is configured to wirelessly supply power from the power transmitter antenna to the power receiver antenna. The power receiver device includes a power-receiver communication antenna, and a power-receiver control unit configured to perform energization control of the power-receiver communication antenna to supply a vehicle-side signal, which includes a power supply request signal indicating power supply request to the power transmitter antenna, to the power-receiver communication antenna. The power transmitter device includes a power-transmitter communication antenna configured to wirelessly communicate with the power-receiver communication antenna, and a power-transmitter control unit configured to perform energization control of the power transmitter antenna to wirelessly supply power to the power receiver antenna. The power-transmitter control unit is configured to energize the power transmitter antenna when determining that there is power supply request based on an output signal from the power-transmitter communication antenna. The wireless power supply system further comprises: an acquisition unit configured to acquire information on received power of the power receiver antenna in a target vehicle of power supply and information on transmitted power from the power transmitter antenna to the target vehicle; and a determination unit configured to determine whether the received power with respect to the transmitted power is normal based on the information on the transmitted power and the information on the received power acquired by the acquisition unit. The power-transmitter control unit is configured to, when the determination unit makes determination of not normal, stop energization of the power transmitter antenna even when determining that there is the power supply request.

[0011] According to the present disclosure, it is possible to appropriately perform energization control to the power transmitter antenna.

[0012] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0013] FIG. 1 is an overall configuration diagram of a wireless power supply system according to a first embodiment.FIG. 2 is an overall configuration diagram of the wireless power supply system.FIG. 3 is a diagram illustrating a power transmitter and a power receiver.FIG. 4 is a diagram illustrating a configuration of wide-area wireless communication between the power transmitter and a vehicle.FIG. 5 is a configuration diagram illustrating a transmitter and its peripheral device.FIG. 6 is a diagram illustrating a generation state of power transmission by a vehicle with an expanded communication range.FIG. 7 is a flowchart of a process performed by the power receiver.FIG. 8 is a flowchart of a process performed by the power transmitter.FIG. 9 is a flowchart of a process performed by a server.FIG. 10 is another flowchart of a process performed by the power transmitter.FIG. 11 is a flowchart of a process performed by a server according to a second embodiment.FIG. 12 is a flowchart of a process performed by a power receiver of a target vehicle.FIG. 13 is a flowchart of a process performed by a power receiver of a target vehicle according to a third embodiment.FIG. 14 is a flowchart of a process performed by a server according to a fourth embodiment.FIG. 15 is a flowchart of a process performed by a power receiver.FIG. 16 is a flowchart of a process performed by a power transmitter.FIG. 17 is a flowchart of a process performed by a power receiver according to a fifth embodiment.FIG. 18 is a flowchart of a process performed by the power transmitter.

[0014] Multiple embodiments will be described with reference to the drawings. In some embodiments, parts that are functionally and / or structurally corresponding to each other and / or associated with each other are given the same reference numerals, or reference numerals with different hundred digit or more digits. The corresponding and / or associated parts may refer to the explanation in the other embodiments.

[0015] <First Embodiment> A first embodiment of a wireless power supply system of the present disclosure will be described in the following with reference to the drawings.

[0016] First, an overall configuration of the wireless power supply system will be described. As shown in FIGs. 1, 2, and 3, a wireless power supply system 10 includes a power transmitter 20 and a power receiver 100. The power receiver 100 is mounted on a vehicle 11 as a moving object that travels on a road RS, and is a vehicle-side device. The vehicle 11 is, for example, an electric automobile or a hybrid vehicle. The electric power is supplied from the power transmitter 20 to the power receiver 100 while the vehicle 11 is travelling or stopped. The wireless power supply system 10 performs wireless power transmission from the power transmitter 20 to the power receiver 100 through magnetic field resonance coupling (magnetic field resonance). The wireless power supply system 10 is also referred to as a dynamic wireless power transmission (D-WPT) system.

[0017] The power transmitter 20 is a ground-side device, and includes a power-transmitter coil unit 21 and a power-transmitter power supply unit 51 that supplies electric power to the power-transmitter coil unit 21. The power transmitter 20 is, for example, a stationary device. The power-transmitter coil unit 21 is installed (for example, buried) in the road RS, a parking lot, or the like. The power-transmitter power supply unit 51 is installed, for example, on a side of the road RS. The power-transmitter coil unit 21 is connected to the power-transmitter power supply unit 51. The power-transmitter power supply unit 51 is connected to an AC power source 15, and supplies AC (alternating-current) power from the AC power source 15 to the power-transmitter coil unit 21. The AC power source 15 is, for example, a commercial power source. Multiple power-transmitter coil units 21 are arranged along lanes of the road RS. FIG. 2 shows an example of four power-transmitter coil units 21 arranged along the road RS and connected to one power-transmitter power supply unit 51. In other words, one power-transmitter power supply unit 51 is provided for the four power-transmitter coil units 21.

[0018] The configuration is not limited to the one where one power-transmitter power supply unit 51 is provided for of the multiple power-transmitter coil units 21, but may also be the one where one power-transmitter power supply unit 51 is provided for one power-transmitter coil unit 21.

[0019] The power-transmitter power supply unit 51 includes a PFC (Power Factor Correction) circuit 61, an inverter 60, and a filter circuit 52. The PFC circuit 61 includes an AC / DC converter, and is connected to the AC power source 15. The PFC circuit 61 includes switching elements (e.g., IGBTs or MOSFETs) that are switched and controlled to convert the input AC power to DC (direct current) power while improving a power factor of the AC power input from the AC power source 15.

[0020] The inverter 60 is connected to the PFC circuit 61. The inverter 60 includes switching elements (e.g., IGBTs or MOSFETs) that are switched and controlled to convert the DC power input from the PFC circuit 61 to AC power.

[0021] The filter circuit 52 removes noise contained in the AC current input from the inverter 60, and supplies the AC current from which noise has been removed to the power-transmitter coil unit 21. The filter circuit 52 is, for example, an LC filter that includes a coil and a capacitor. Circuits having various configurations can be used as the filter circuit 52, one of which, for example, may be a T-type filter circuit.

[0022] The power-transmitter coil unit 21 includes a power-transmitter coil 22 (corresponding to a “power transmitter antenna”), a power-transmitter resonance circuit 30, and a power-transmitter communication coil 40. The power-transmitter resonance circuit 30 supplies the AC power supplied by the filter circuit 52 to the power-transmitter coil 22. The power-transmitter resonance circuit 30 can be implemented by using various well-known resonance circuits such as a circuit including a resonant capacitor.

[0023] The power receiver 100 includes a power-receiver coil unit 101 and a power-receiver power supply unit 181. The power-receiver coil unit 101 includes a power-receiver coil 102 (corresponding to a “power receiver antenna”). The power-receiver coil unit 101 is provided on a bottom of a vehicle body of the vehicle 11. The power-receiver coil unit 101 on the bottom of the vehicle body is provided to face a surface of the ground. When the vehicle 11 travels on the road RS where the power-transmitter coil 22 is buried, the power-transmitter coil 22 on the ground side and the power-receiver coil 102 of the vehicle 11 face each other in a vertical direction.

[0024] The power receiver 100 includes a power-receiver resonance circuit 140. The power-receiver coil 102 is connected to the power-receiver resonance circuit 140. The power-receiver coil 102 is supplied with electric power from the power-transmitter coil 22. The power-receiver coil 102 supplies the received power to the power-receiver resonance circuit 140. The power-receiver resonance circuit 140 can be implemented by using various well-known resonance circuits such as a circuit including a resonant capacitor.

[0025] The power receiver 100 includes a filter circuit 182, a rectifier circuit 200 that functions as a DC-AC conversion circuit, and a smoothing capacitor 210. The filter circuit 182 removes noise contained in the AC current input from the power-receiver resonance circuit 140, and supplies the AC current from which noise has been removed to the rectifier circuit 200. The filter circuit 182 of the present embodiment is, for example, an LC filter that includes a reactor and a capacitor.

[0026] The rectifier circuit 200 converts the input AC current to a DC current, and outputs the DC current. The rectifier circuit 200 is, for example, a full-bridge circuit including semiconductor switching elements, or a diode rectifier circuit. A first end of the smoothing capacitor 210 is connected to a high potential side output terminal of the rectifier circuit 200. A second end of the smoothing capacitor 210 is connected to a low potential side output terminal of the rectifier circuit 200. The rectifier circuit 200 is also referred to as an ERB (Electronic Rectification Box).

[0027] The vehicle 11 includes a high potential main switch 301H, a low potential main switch 301L, and a high-voltage storage battery 300 as a power storage unit. The high potential main switch 301H and the low potential main switch 301L are, for example, relays (specifically, mechanical relays). The high potential side output terminal of the rectifier circuit 200 is connected to a positive terminal of the high-voltage storage battery 300 via the high potential main switch 301H. The low potential side output terminal of the rectifier circuit 200 is connected to a negative terminal of the high-voltage storage battery 300 via the low potential main switch 301L. The high-voltage storage battery 300 is a secondary battery that can be charged and discharged, and has a rated voltage of several hundred volts, for example. The high-voltage storage battery 300 is, for example, a lithium-ion storage battery or a nickel-metal hydride storage battery.

[0028] The vehicle 11 includes a travelling inverter 310 and a rotary electric machine 320. The travelling inverter 310 is a 3-phase inverter, and is connected to the high-voltage storage battery 300 via the high potential main switch 301H and the low potential main switch 301L. Armature windings of the rotary electric machine 320 are connected to upper and lower arm switches that constitute the travelling inverter 310. By performing switching control of the upper and lower arm switches of the travelling inverter 310 while the high potential main switch 301H and the low potential main switch 301L are turned on, the travelling inverter 310 converts the DC power supplied from the high-voltage storage battery 300 to AC power, and supplies it to the armature windings. In such manner, a rotor of the rotary electric machine 320 to rotate, and the rotational power of the rotor rotates wheels 12 (drive wheels) of the vehicle 11. In such manner, the vehicle 11 travels.

[0029] As shown in FIG. 3, the power-transmitter power supply unit 51, which constitutes the power transmitter 20, includes a power-transmitter control unit 70. The power-transmitter control unit 70 includes a power-transmitter controller 71. The power-transmitter controller 71 is an electronic control unit (ECU) that performs various controls of the power transmitter 20 and includes, as hardware, a processor, a storage unit, and a communication bus connecting the processor with the storage unit.

[0030] The storage unit includes, as hardware, a memory and a storage. The memory is a storage device for storing data used in the process of the power-transmitter controller 71. The memory, for example, provides the processor with a work area for temporary use when the processor performs a process. The memory includes, for example, RAM or ROM. The storage is a storage device that stores various programs and data to be read and executed by the processor, and is a non-transitory, tangible storage medium. The storage includes, for example, HDD or flash memory. The storage memorizes program information and the like for the process described in the following.

[0031] The power-receiver power supply unit 181, which constitutes the power receiver 100, includes a power-receiver controller 231. The power-receiver controller 231 is an ECU that performs various controls of the power receiver 100, and includes, as hardware, a processor, a storage unit, and a communication bus that connects the processor and the storage unit.

[0032] The storage unit includes, as hardware, a memory and a storage. The memory is a storage device for memorizing data used in the process of the power-receiver controller 231. The memory, for example, provides the processor with a work area for temporary use when the processor performs a process. The memory includes, for example, RAM or ROM. The storage is a storage device that stores various programs and data to be read and executed by the processor, and is a non-transitory, tangible storage medium. The storage includes, for example, HDD or flash memory. The storage memorizes program information and the like for the process described in the following.

[0033] The power-transmitter controller 71 performs switching control of the PFC circuit 61 and switching control of the inverter 60. Through the switching control of the inverter 60, a high-frequency AC voltage is applied to the power-transmitter coil 22. In such manner, a high-frequency current flows in the power-transmitter coil 22, and a magnetic field for power transmission is generated in the power-transmitter coil 22.

[0034] In the present embodiment, the power-transmitter controller 71 performs switching control of the inverter 60 so that the frequency of the high-frequency voltage applied to the power-transmitter coil 22 becomes a first specified frequency equal to or higher than 10 kHz and equal to or lower than 100 GHz, more specifically, 85 kHz. The resonance frequency of the power-transmitter resonance circuit 30 and the power-receiver resonance circuit 140 are set to a frequency that is same as or close to the first specified frequency.

[0035] When the magnetic field generated in the power-transmitter coil 22 interlinks the power-receiver coil 102 of the vehicle 11, a high-frequency current flows in the power-receiver coil 102, the frequency of which varies with the frequency of the high-frequency current flowing in the power-transmitter coil 22. The high-frequency current flowing in the power-receiver coil 102 is supplied to the rectifier circuit 200 through the power-receiver resonance circuit 140 and the filter circuit 182. The rectifier circuit 200 converts the supplied AC current to a DC current, and outputs the DC current. While the high potential main switch 301H and the low potential main switch 301L are turned on, the output current of the rectifier circuit 200 is supplied to the high-voltage storage battery 300 and the travelling inverter 310.

[0036] The vehicle 11 includes a low-voltage storage battery 302. The rated voltage of the low-voltage storage battery 302 is lower than the rated voltage of the high-voltage storage battery 300. The low-voltage storage battery 302 is, for example, a lead-acid battery. The electric power supplied from the low-voltage storage battery 302 to the power-receiver controller 231 enables the power-receiver controller 231 to operate.

[0037] The power receiver 100 includes a power-receiver voltage sensor 341 and a power-receiver current sensor 342. The power-receiver voltage sensor 341 detects voltages of various in-vehicle devices of the vehicle 11 (specifically, components of the power receiver 100), e.g., a voltage of the smoothing capacitor 210. The power-receiver current sensor 342 detects electric currents flowing in various in-vehicle devices of the vehicle 11 (specifically, the components of the power receiver 100), e.g., electric currents flowing in the power-receiver coil 102 and the rectifier circuit 200. The detected values of each of the sensors 341, 342 are input to the power-receiver controller 231.

[0038] The power transmitter 20 includes a power-transmitter voltage sensor 91 and a power-transmitter current sensor 92. The power-transmitter voltage sensor 91 detects the voltages of various components of the power transmitter 20, e.g., the voltage of the power-transmitter coil 22. The power-transmitter current sensor 92 detects the electric current flowing through various components of the power transmitter 20, e.g., the electric current flowing through the power-transmitter coil 22. The detected values of each of the sensors 91, 92 are input to the power-transmitter controller 71.

[0039] The power receiver 100 and the power transmitter 20 each has a configuration for communication between the power receiver 100 and the power transmitter 20. More practically, the power-receiver coil unit 101, which constitutes the power receiver 100, includes a power-receiver communication coil 170 (corresponding to a power-receiver communication antenna). A power-receiver control unit 230 includes a transmitter 240.

[0040] The power-transmitter coil unit 21, which constitutes the power transmitter 20, includes a power-transmitter communication coil 40 (corresponding to a power-transmitter communication antenna). The power-transmitter control unit 70 includes a receiver 80. The power-receiver communication coil 170 and the power-transmitter communication coil 40 are communication coils for short-range wireless communication. The short-range wireless communication is a communication of a communication distance less than 10 meters (e.g., a maximum of 3 meters). The short-range wireless communication is a communication with a shorter communication distance than a wide-area wireless communication.

[0041] Various short-range wireless communications are usable as the short-range wireless communication. For example, communications compliant with any communication standards formulated by IEEE, ISO, and IEC can be used. Specifically, for example, Wi-Fi (registered trademark), Bluetooth (registered trademark), ZigBee (registered trademark), RFID (Radio Frequency Identification), or DSRC (Dedicated Short Range Communication) can be used as the short-range wireless communication.

[0042] The transmitter 240 is connected to the power-receiver controller 231. The power-receiver communication coil 170 is connected to the transmitter 240. The power-receiver controller 231 controls the transmitter 240 to supply a power supply request signal COMM to the power-receiver communication coil 170. The power supply request signal COMM is a signal requesting the power-transmitter coil 22 near the vehicle 11 to transmit electric power to the power-receiver coil 102.

[0043] The power-receiver control unit 230 controls the transmitter 240 to include, in a vehicle-side signal, the power supply request signal COMM and travel speed information of the vehicle 11 in one frame and to supply the frame to the power-receiver communication coil 170. In the present embodiment, the power supply request signal (COMM) includes ID information of the vehicle 11 and a requested power Weq that is a requested value of electric power to be supplied to the vehicle 11. Such control causes a high-frequency voltage to be applied from the transmitter 240 to the power-receiver communication coil 170. Consequently, a high-frequency current flows in the power-receiver communication coil 170, and a magnetic field for information communication is generated in the power-receiver communication coil 170.

[0044] When the power-receiver coil unit 101 of the vehicle 11 approaches the power-transmitter coil unit 21 on the ground side and the magnetic field generated by the power-receiver communication coil 170 interlinks the power-transmitter communication coil 40, a high-frequency current flows in the power-transmitter communication coil 40. Such high-frequency current is input to the receiver 80. The receiver 80 recognizes the presence or absence of a power supply request and ID information based on the input signal from the power-transmitter communication coil 40. Further, the receiver 80 acquires the requested power Weq of the vehicle 11 having the recognized ID information, based on the signal from the power-transmitter communication coil 40. The information recognized by the receiver 80 and the requested power Weq are input to the power-transmitter controller 71.

[0045] In the present embodiment, the power-receiver controller 231 controls the transmitter 240 so that the frequency of the high-frequency voltage applied to the power-receiver communication coil 170 becomes a second specified frequency equal to or higher than 10 kHz and equal to or lower than 100 GHz. In the present embodiment, the second specified frequency is a frequency that deviates from the first specified frequency above, specifically a frequency higher than the first specified frequency (e.g., 13.56 MHz).

[0046] The power-transmitter controller 71 determines whether to energize the power-transmitter coil 22 based on the input signal from the receiver 80. More practically, the power-transmitter controller 71 applies a high-frequency voltage to the power-transmitter coil 22 by performing switching control of the inverter 60 and the PFC circuit 61, on condition of determining that there is a power supply request based on the input signal from the receiver 80. According to the above, power transmission from the power-transmitter coil 22 to the power-receiver coil 102 is performed in a wirelessing manner. Note that, when the power-transmitter controller 71 determines that there is a power supply request, the power-transmitter controller 71 actually performs a coupling determination process to determine whether a degree of magnetic coupling between the power-receiver coil 102 and the power-transmitter coil 22 is appropriate for power transmission, prior to performing switching control of the inverter 60 and the PFC circuit 61. The power-transmitter controller 71 performs switching control of the inverter 60 and the PFC circuit 61 on condition of determining that the degree of magnetic coupling between the power-receiver coil 102 and the power-transmitter coil 22 is appropriate. In such manner, the power-transmitter coil 22 is energized in a state where the power-receiver coil 102 and the power-transmitter coil 22 are in close proximity to each other.

[0047] FIG. 4 is a schematic diagram for explaining wide-area wireless communication in the wireless power supply system 10. In the wireless power supply system 10, each of the vehicles 11 is capable of communicating with each of the power transmitters 20 via a communication network 16. The communication network 16 includes, for example, a WAN (Wide Area Network), which is a public communication network such as the Internet, a telephone communication network for a mobile phone, an information and communication network for ETC, and an information and communication network for a Vehicle Information and Communication System (VICS (registered trademark)). The wide-area wireless communication is a communication with a longer communication distance than the short-range wireless communication. The wide-area wireless communication is a communication with a communication distance of, for example, 10 meters to 10 kilometers. Examples of the wide-area wireless communication include 3GPP (registered trademark), 4G, LTE, 5G, and WiMAX (registered trademark) formulated by IEEE.

[0048] The vehicle 11 is equipped with a position sensor 330, a navigation device 331, and a communication unit 332. The position sensor 330 is a sensor that detects a current position of the vehicle 11, and is, for example, a GPS sensor. A storage unit (for example, storage) of the navigation device 331 memorizes map information including road information. The navigation device 331 receives information on the current position of the vehicle 11 detected by the position sensor 330 and weather information. The power-transmitter control unit 70 of the power transmitter 20 includes a communication unit 90. The communication unit 332 of the vehicle 11 and the communication unit 90 of the power-transmitter control unit 70 perform wide-area wireless communication via the communication network 16.

[0049] The wireless power supply system 10 includes a server 400. The server 400 is, for example, a cloud server, and includes a server controller 401 and a communication unit 402. The server controller 401 is an electronic control unit (ECU) that performs various controls of the server 400, and includes, as hardware, a processor, a storage unit, and includes a processor as hardware and a communication bus connecting the processor with the storage unit. The storage unit includes a memory and a storage as hardware. The memory is a storage device for storing data used in the process of the server controller 401. The memory, for example, provides the processor with a work area for temporary use when the processor performs a process. The memory includes, for example, RAM or ROM. The storage is a storage device that stores various programs and data to be read and executed by the processor, and is a non-transitory, tangible storage medium. The storage includes, for example, HDD or flash memory. The storage memorizes program information and the like for the process described in the following.

[0050] The server controller 401 is connected to the communication unit 402. The server controller 401 performs wide-area wireless communication with the communication unit 332 of the vehicle 11 and the communication unit 90 of the power-transmitter control unit 70 via the communication unit 402 and the communication network 16.

[0051] Note that, for example, program information stored on the non-transitory, tangible storage medium is installed in the storage units of the power-receiver controller 231, the power-transmitter controller 71 and the server controller 401. The storage medium is, for example, a USB memory, CD-ROM or DVD. In addition, the program information transmitted over the communication network 16, such as OTA (Over The Air), is installed in the storage units.

[0052] The transmitter 240 and its peripheral configuration will be described with reference to FIG. 5.

[0053] The transmitter 240 includes a generation circuit 241, and a power-receiver amplifier 242. The generation circuit 241 is connected to the power-receiver controller 231 and the power-receiver amplifier 242. The generation circuit 241 generates a vehicle-side signal, which is a high-frequency signal including a power supply request signal, based on an instruction from the power-receiver controller 231. The frequency of the vehicle-side signal is the second specified frequency described above. The power-receiver amplifier 242 amplifies the high-frequency signal generated by the generation circuit 241, and supplies the amplified signal to the power-receiver communication coil 170.

[0054] The power-receiver controller 231 instructs generation of a vehicle-side signal to the generation circuit 241. The high-frequency signal output from the generation circuit 241 is amplified by the power-receiver amplifier 242. The amplified signal is supplied to the power-receiver communication coil 170.

[0055] Next, the receiver 80 and its peripheral configuration will be described.

[0056] The receiver 80 amplifies the high-frequency signal (high-frequency current or voltage signal) output from the power-transmitter communication coil 40. The high-frequency signal output from the power-transmitter communication coil 40 includes a frequency component that fluctuates at the second specified frequency.

[0057] The receiver 80 calculates an intensity Intd, which is an amplitude or an effective value of the input power supply request signal, by detecting the amplified high-frequency signal. When the receiver 80, when determining that the calculated intensity Intd exceeds a determination threshold Ijde, determines that there is a power supply request. On the other hand, when determining that the calculated intensity Intd is lower than the determination threshold Ijde, the receiver 80 determines that there is no power supply request. The determination result information of the receiver 80 is input to the power-transmitter controller 71.

[0058] When determining that there is no power supply request based on the input determination result information, the power-transmitter controller 71 stops switching control of the PFC circuit 61 and the inverter 60. In such manner, the switches of the PFC circuit 61 and the inverter 60 are kept off, and the power-transmitter coil 22 is not energized.

[0059] On the other hand, on condition of determining that there is a power supply request based on the input determination result information, the power-transmitter controller 71 applies a high-frequency voltage to the power-transmitter coil 22 by performing switching control of the PFC circuit 61 and the inverter 60. In such manner, the transmitter coil 22 receives a high-frequency current flowing therethrough. In such case, wireless power supply from the power-transmitter coil 22 to the power-receiver coil 102 that faces the power-transmitter coil 22 in the vertical direction is performed.

[0060] Meanwhile, there may be a case where the intensity of the power supply request signal supplied to the power-receiver communication coil 170 of the vehicle becomes excessively large, thereby a communication range of the power supply request signal transmitted from the vehicle overextends. In FIG. 6, 500 indicates a vehicle with an overextended communication range. There is a concern that the power supply request signal transmitted from such vehicle may result in inappropriate energization control to the power-transmitter coil.

[0061] For example, when an other vehicle 11 in a stopped state is present near the vehicle 500 in a stopped state, whose communication range is overextended, energization to the power-transmitter coil 22 near the other vehicle 11 starts. In such case, a relative positional relationship between the power-receiver coil 102 of the other vehicle 11 and the power-transmitter coil 22 near the other vehicle 11 may be deviated from an appropriate positional relationship for wireless power supply. For example, the appropriate positional relationship is a positional relationship in which the power-transmitter coil 22 and the power-receiver coil 102 face each other in the vertical direction. Specifically, for example, the appropriate positional relationship is a positional relationship in which at least a part of a coil inner region of the power-receiver coil 102 overlaps with at least a part of the coil inner region of the power-transmitter coil 22 when the vehicle 11 is viewed from above. When the above-mentioned relative positional relationship is deviated from the appropriate positional relationship, the magnetic field from the power-transmitter coil 22 may act on components (e.g., sensors or actuators) near the wheel 12 that would not otherwise be expected with the appropriate relative positional relationship. In such case, there is a risk that the components affected by the magnetic field may fail.

[0062] Further, issues may also occur even when, for example, there are no other vehicle(s) in the proximity of the vehicle 500 whose communication range has been overextended. More practically, when a power supply request signal is being transmitted from the vehicle 500, not only the power-transmitter coils 22 near the vehicle 500 but also the power-transmitter coils 22 away from the vehicle 500 may be energized. In such case, there is a concern that electric power is wasted, and / or leakage magnetic field increases.

[0063] Therefore, in the wireless power supply system 10 of the present embodiment, energization to the power-transmitter coil 22 is stopped even when there is a power supply request from a vehicle whose communication range has been overextended.

[0064] FIG. 7 is a flowchart of a process performed by the power-receiver control unit 230.

[0065] In step S10, the power-receiver controller 231 determines whether there is a power supply request. When determining that there is a power supply request, the power-receiver controller 231 proceeds to step S11, and instructs the transmitter 240 to generate a vehicle-side signal including a power supply request signal. In such manner, a vehicle-side signal is supplied from the transmitter 240 to the power-receiver communication coil 170.

[0066] On the other hand, when determining that there is no power supply request, the power-receiver controller 231 proceeds the process to step S12, and instructs the transmitter 240 to stop generation of the vehicle-side signal including a power supply request signal. In such manner, the supply of the vehicle-side signal from the transmitter 240 to the power-receiver communication coil 170 is stopped.

[0067] After step S11 or S12, in step S13, the power-receiver controller 231 calculates a received power Wchr [W] of the power-receiver coil 102 in response to the supply of the power supply request signal in step S11. For example, the power-receiver controller 231 may calculate the received power Wchr based on (i) the electric current flowing through the rectifier circuit 200 or the power-receiver coil 102 detected by the power-receiver current sensor 342 and (ii) the voltage of the rectifier circuit 200 or the power-receiver coil 102 detected by the power-receiver voltage sensor 341.

[0068] In step S14, the power-receiver controller 231 associates the calculated received power Wchr with the ID information of the vehicle 11 in which the power-receiver controller 231 itself is installed. The power-receiver controller 231 transmits the received power Wchr associated with the ID information to the communication unit 402 of the server 400 by wide-area wireless communication via the communication unit 332 and the communication network 16.

[0069] FIG. 8 is a flowchart of the process performed by the power-transmitter control unit 70.

[0070] In step S20, the power-transmitter controller 71 acquires a result of determination as to whether there is a power supply request from the receiver 80. Further, the power-transmitter controller 71 acquires the ID information of the vehicle transmitting the power supply request signal based on an output signal of the power-transmitter communication coil 40.

[0071] In step S21, the power-transmitter controller 71 determines whether there is a power supply request based on the determination result. When the power-transmitter controller 71 determines that there is no power supply request, the process proceeds to step S22. In step S22, the power-transmitter controller 71 stops the switching control of the inverter 60 and the PFC circuit 61 to stop the energization to the power-transmitter coil 22.

[0072] On the other hand, when the power-transmitter controller 71 determines that there is a power supply request, the process proceeds to step S23. In step S23, the power-transmitter controller 71 performs switching control of the inverter 60 and the PFC circuit 61 to energize the power-transmitter coil 22.

[0073] In step S24, the power-transmitter controller 71 calculates a transmitted power Wdis [W] transmitted from the power-transmitter coil 22 to a target vehicle of power supply. For example, the power-transmitter controller 71 may calculate the transmitted power Wdis based on (i) the electric current flowing through the power-transmitter coil 22 detected by the power-transmitter current sensor 92 and (ii) the voltage of the power-transmitter coil 22 detected by the power-transmitter voltage sensor 91.

[0074] The power-transmitter controller 71 transmits the transmitted power Wdis associated with the ID information acquired in step S20 to the communication unit 402 of the server 400 by wide-area wireless communication via the communication unit 90 and the communication network 16.

[0075] FIG. 9 is a flowchart of the process performed by the server controller 401.

[0076] In step S30, the server controller 401 acquires (i) the received power Wchr, which is the information transmitted in step S14 and associated with the ID information, and (ii) the transmitted power Wdis, which is the information transmitted in step S25 and associated with the ID information. In the present embodiment, the process of step S30 corresponds to an acquisition unit.

[0077] In step S31, the server controller 401 determines, based on the acquired ID information, the transmitted power Wdis, and the received power Wchr, whether the received power Wchr of the vehicle identified by the acquired ID information is normal with respect to the transmitted power Wdis of the vehicle identified by the acquired ID information. In the present embodiment, the process of step S10 corresponds to a “determination unit.”

[0078] Note that the server controller 401 may determine whether the received power Wchr is normal with respect to the transmitted power Wdis as follows, for example. When a transmission efficiency (for example, a maximum transmission efficiency) from the power-transmitter coil 22 to the power-receiver coil 102 is η, “Wchr = η × Wdis” holds true. The server controller 401 may determine that the system is normal when “k x η x Wdis < Wchr ≦ η x Wdis.” For example, k is “0.8 ≦ k ≦ 0.95,” “0.85 ≦ k ≦ 0.95,” or “0.9 ≦ k ≦ 0.95.”

[0079] When determining that the received power Wchr is not normal with respect to the transmitted power Wdis, the server controller 401 proceeds the process to step S32, and transmits target ID information, which is the ID information that has been determined as abnormal, to the communication unit 90 of each of the power transmitters 20 via wide-area wireless communication via the communication unit 402 and the communication network 16. In such manner, the target ID information is shared among the power transmitters 20. A vehicle identified by the target ID information is, for example, a vehicle whose communication range has been overextended. The power-transmitter control unit 70 that has received the target ID information via the communication unit 90 performs the process shown in FIG. 10.

[0080] More specifically, in step S40, the power-transmitter controller 71 acquires the vehicle ID information based on the high-frequency signal input from the power-transmitter communication coil 40. The power-transmitter controller 71 determines whether the acquired ID information is the target ID information.

[0081] When determining that the acquired ID information is the target ID information, the power-transmitter controller 71 recognizes the vehicle identified by the target ID information as a target vehicle. Thereafter, in step S41, the power-transmitter controller 71 determines, based on the high-frequency signal input from the power-transmitter communication coil 40, whether there is a power supply request from the target vehicle.

[0082] When determining that there is a power supply request, the power-transmitter controller 71 proceeds to step S42, and does not energize the power-transmitter coil 22 that is an object of energization control of itself. That is, the power-transmitter controller 71 stops switching control of the inverter 60 and the PFC circuit 61 that are targets of energization control by the power-transmitter controller 71 itself. In such manner, it is possible to suppress issues caused by the transmission of a power supply request signal from the target vehicle. Further, according to the present embodiment, information on energy per unit time, such as the received power Wchr and the transmitted power Wdis, is used to determine whether the system is normal. Therefore, the determination as to whether the system is normal is performable at any timing during a period in which electric current is flowing through both of the power-transmitter coil 22 and the power-receiver coil 102.

[0083] <Second Embodiment> A second embodiment will be described in the following with reference to the drawings mainly in terms of differences from the first embodiment. In the present embodiment, the intensity of the power supply request signal transmitted from the target vehicle is reduced.

[0084] FIG. 11 is a flowchart of the process performed by the server controller 401.

[0085] In step S33, the server controller 401 transmits the determination result information indicating that the vehicle is not normal in step S31 to the communication unit 332 of the target vehicle by wide-area wireless communication via the communication unit 402 and the communication network 16.

[0086] FIG. 12 is a flowchart of the process performed by the power-receiver control unit 230 of the target vehicle.

[0087] In step S50, the power-receiver controller 231 determines whether determination result information has been received from the server 400 indicating that the received power Wchr is not normal with respect to the transmitted power Wdis.

[0088] When it is determined in step S50 that the power-receiver controller 231 has received the information, the process proceeds to step S51, where the power-receiver controller 231 lowers a gain of the power-receiver amplifier 242. In such manner, the intensity of the power supply request signal supplied from the power-receiver amplifier 242 to the power-receiver communication coil 170 is reduced. In such manner, transmission intensity of the power supply request signal can be reduced in the target vehicle. Therefore, it is possible to suppress the occurrence of a state in which components near the wheel 12 of other vehicles in the proximity of the target vehicle fail.

[0089] <Third Embodiment> Hereinafter, a third embodiment will be described with reference to the drawings, focusing on differences from the second embodiment. In the present embodiment, the transmission of the power supply request signal from the target vehicle is prevented.

[0090] FIG. 13 is a flowchart of the process performed by the power-receiver control unit 230 of the target vehicle.

[0091] When determining that the power-receiver controller 231 has received determination result information indicating that the received power Wchr is not normal with respect to the transmitted power Wdis, the power-receiver controller 231 proceeds to step S52, and instructs the generation circuit 241 to prevent generation of a vehicle-side signal including a power supply request signal. In such manner, the power-receiver communication coil 170 stops transmission of the power supply request signal. Therefore, it is possible to suppress the occurrence of a state in which components near the wheel 12 of other vehicles in the proximity of the target vehicle fail.

[0092] <Fourth Embodiment> A fourth embodiment will be described in the following with reference to the drawings mainly in terms of differences from the second embodiment. In the present embodiment, other vehicles present near the target vehicle are instructed to transmit a stop request signal. The stop request signal is a signal that requests for a stop of power supply from the power-transmitter coil 22 to the power-receiver coil 102.

[0093] FIG. 14 is a flowchart of the process performed by the server controller 401.

[0094] In step S34, the server controller 401 transmits a transmission instruction for a stop request signal to the power-receiver controller 231 of other vehicles in the proximity of the target vehicle by wide-area wireless communication. Note that, for example, the server controller 401 receives, via wide-area wireless communication from each vehicle, the position information of each vehicle detected by the position sensor 330 and the vehicle ID information associated with each detected position information. The server controller 401 may identify the other vehicle to which the instruction is transmitted based on the received position information and ID information. Specifically, for example, the server controller 401 may identify vehicles within a predetermined radius Ld around the target vehicle as the other vehicles to which the instruction is transmitted. The predetermined radius Ld is, for example, “2m ≦ Ld ≦ 10m,” “2m ≦ Ld ≦ 7m,” “2m ≦ Ld ≦ 5m,” “4m ≦ Ld ≦ 10m,” or “4m ≦ Ld ≦ 7m.”

[0095] FIG. 15 is a flowchart of the process performed by the power-receiver control unit 230.

[0096] In step S60, the power-receiver controller 231 determines whether a transmission instruction to transmit a stop request signal has been received from the server 400 via wide-area wireless communication.

[0097] When determining that a transmission instruction has been received, the power-receiver controller 231 proceeds to step S61, and instructs the generation circuit 241 to supply a stop request signal to the power-receiver communication coil 170.

[0098] The stop request signal is a signal different from the power supply request signal.

[0099] For example, the stop request signal is a signal having a higher intensity than the power supply request signal. A high intensity means that an amplitude or an effective value of the signal is high. In such case, the frequency of the stop request signal may be the same as the frequency of the power supply request signal, for example.

[0100] Also, for example, the stop request signal is a signal having a different bit length from the power supply request signal. In such case, the frequency of the stop request signal may be the same as the frequency of the power supply request signal, for example. Also, for example, the stop request signal is a signal having a different frequency from that of the power supply request signal.

[0101] The stop request signal may be, for example, (a) a signal having a higher intensity than the power supply request signal and a different frequency than the power supply request signal, (b) a signal having a higher intensity than the power supply request signal and a different bit length than the power supply request signal, or (c) a signal having a different frequency than the power supply request signal and a different bit length than the power supply request signal.

[0102] Such a stop request signal allows the power-transmitter control unit 70 to appropriately distinguish between a power supply request signal and a stop request signal.

[0103] Note that, when the stop request signal is a signal having a different bit length from the power supply request signal, the stop request signal may be a signal having a shorter bit length than the power supply request signal. In such manner, an energization stop request to the power-transmitter coil 22 is notified to the power-transmitter control unit 70 as early as possible.

[0104] FIG. 16 is a flowchart of the process performed by the power-transmitter control unit 70.

[0105] When it is determined in step S21 that there is a power supply request, the power-transmitter controller 71 proceeds to step S26, and acquires from the receiver 80 a determination result as to whether a stop request signal has been received. The receiver 80 determines, based on the high frequency signal input from the power-transmitter communication coil 40, whether a stop request signal has been received.

[0106] When the power-transmitter controller 71 determines that a stop request signal has not been received, the process proceeds to step S23. On the other hand, when the power-transmitter controller 71 determines that a stop request signal has been received, the process proceeds to step S22. In step S22, the power-transmitter controller 71 stops the switching control of the inverter 60 and the PFC circuit 61, to stop the energization to the power-transmitter coil 22.

[0107] Note that, when the stop request signal is a signal having a different frequency from the power supply request signal, a carrier frequency and a modulation frequency for generating the stop request signal may be different from each other. In digital communications using subcarriers, for example, when the modulation frequency is normally set to 3.3 kHz, if a modulation frequency of 1 kHz is received by the power-transmitter control unit 70, the power-transmitter control unit 70 may determine that a stop request signal has been received.

[0108] According to the present embodiment described above, an influence of the magnetic field from the power-transmitter coil 22 acting on the components near the wheel 12 is appropriately suppressible. Therefore, the occurrence of component failures is suppressible.

[0109] <Fifth Embodiment> A fifth embodiment will be described in the following with reference to the drawings mainly in terms of differences from the second embodiment. In the present embodiment, a process is performed between the power transmitter 20 and the power receiver 100 without the server 400.

[0110] FIG. 17 is a flowchart of the process performed by the power-receiver control unit 230.

[0111] The power-receiver controller 231 instructs the generation circuit 241 to include information on the received power Wchr calculated in step S13 in the vehicle-side signal. More practically, the power-receiver controller 231 instructs the generation circuit 241 to include, in association with each other, (a) information on the received power Wchr and (b) time information on time of when the received power Wchr is received from the power transmitter 20, in the vehicle-side signal. In such manner, information on the received power Wchr and the time information are transmitted from the power-receiver communication coil 170 to the power-transmitter communication coil 40 by short-range wireless communication.

[0112] FIG. 18 is a flowchart of the process performed by the power-transmitter control unit 70.

[0113] In step S27, the power-transmitter controller 71 acquires a determination result as to whether there is a power supply request from the receiver 80. Further, the power-transmitter controller 71 acquires information on the received power Wchr and the time information during reception of a vehicle-side signal including a power supply request signal, based on an output signal of the power-transmitter communication coil 40. In step S24, the power-transmitter controller 71 calculates the transmitted power Wdis in association with the time information at which electric power is transmitted from the power transmitter. In the present embodiment, the process of step S24, S27 corresponds to an “acquisition unit.”

[0114] After completion of step S24, in step S28, the power-transmitter controller 71 determines whether the time information associated with the received power Wch acquired in step S27 matches the time information associated with the transmitted power Wdis calculated in step S24. When it is determined that they match, the power-transmitter controller 71 determines whether the received power Wchr acquired in step S27 is normal with respect to the transmitted power Wdis calculated in step S24. In the present embodiment, the process of step S10 corresponds to a “determination unit.” Note that the power-transmitter controller 71 may determine whether the state is normal in the same manner as in step S31 in FIG. 9 described above.

[0115] When determining that the received power Wchr is not normal with respect to the transmitted power Wdis, the power-transmitter controller 71 proceeds to step S29, and does not energize the power-transmitter coil 22 that is the target of its own energization control. That is, the power-transmitter controller 71 stops switching control of the inverter 60 and the PFC circuit 61 that are targets of energization control by the power-transmitter controller 71 itself.

[0116] According to the present embodiment described above, the process can be completed between the power receiver 100 and the power transmitter 20 without going through the server 400.

[0117] <Modifications of Fifth Embodiment> In the process shown in FIGs. 17 and 18, for example, password information may be used instead of the time information. In such case, the password information used between the power transmitter 20 and the power receiver 100 may be determined in advance.

[0118] <Other Embodiments> The above-described embodiments may be changed and carried out as follows.

[0119] The received power Wchr used in each of the above-described embodiments is not limited to the received power at a certain timing, but may be a time average value of the received power during a portion of a period from when energization to the power-receiver coil 102 begins to when energization ends. Further, the transmitted power Wdis used in each of the above-described embodiments is not limited to the transmitted power at a certain timing, but may be a time average value of the transmitted power during a portion of a period from when energization to the transmission coil 22 begins to when energization ends.

[0120] The acquisition unit and the determination unit may be provided in the power-receiver controller 231 of the power receiver 100 instead of in the server controller 401 of the server 400.

[0121] The power-receiver communication antenna and the power-transmitter communication antenna are not limited to communication coils, but may also be implemented as various antennas. For example, the communication antenna is a dipole antenna or a monopole antenna.

[0122] The method of wireless power transmission by the power transmitter antenna and the power receiver antenna is not limited to the magnetic field resonance method, but may also be an electric field coupling method. In such case, a power transmitter antenna and a power receiver antenna may be used to implement a method that is different from a form using coils but is a form using an electric field coupling method.

[0123] The vehicle identification information used in the processes of the above-described embodiments is not limited to the vehicle ID information, and may also be, for example, a token or credit card information of a vehicle user.

[0124] The vehicle on which the power receiver 100 is mounted is not limited to a vehicle traveling on the road RS, but may also be, for example, an AGV (Automated Guided Vehicle) or a traveling robot. In such case, the power-transmitter coil unit 21 is not buried in the road RS, but may be installed on a sidewalk adjacent to the road RS, in a parking lot, or in a path along which the AGV travels.

[0125] The control units and the methods thereof described in the present disclosure may be implemented by a dedicated computer including a processor programmed to perform one or more functions embodied by a computer program and a memory. Alternatively, the control units and the methods thereof described in the present disclosure may be implemented by a dedicated computer including a processor with one or more dedicated hardware logic circuits. Alternatively, the control unit and the method thereof described in the present disclosure may be implemented by using one or more dedicated computers constituted as a combination of the processor and the memory programmed to perform one or more functions and the processor with one or more hardware logic circuits. Also, the computer programs may be memorized, as instructions to be executed by a computer, in a non-transitory, tangible computer-readable storage medium.

[0126] Although the present disclosure has been described according to the embodiments, it is understood that the present disclosure is not limited to the above-described embodiments or structures. The present disclosure also encompasses various modifications and variations within the scope of equivalents. Furthermore, although various combinations and modes are described in the present disclosure, the scope and idea of the present disclosure further include other combinations and modes including only one element, more elements, or less elements in these.

Claims

1. A wireless power supply system (10) comprising: a power transmitter device (20) including a power transmitter antenna (22); and a power receiver device (100) to be mounted on a vehicle (11) and including a power receiver antenna (102), wherein the wireless power supply system is configured to wirelessly supply power from the power transmitter antenna to the power receiver antenna, the power receiver device includes a power-receiver communication antenna (170), and a power-receiver control unit (230) configured to perform energization control of the power-receiver communication antenna to supply a vehicle-side signal, which includes a power supply request signal indicating power supply request to the power transmitter antenna, to the power-receiver communication antenna, the power transmitter device includes a power-transmitter communication antenna (40) configured to wirelessly communicate with the power-receiver communication antenna, and a power-transmitter control unit (70) configured to perform energization control of the power transmitter antenna to wirelessly supply power to the power receiver antenna, the power-transmitter control unit is configured to energize the power transmitter antenna when determining that there is power supply request based on an output signal from the power-transmitter communication antenna, the wireless power supply system further comprising: an acquisition unit (71, 401) configured to acquire information on received power of the power receiver antenna in a target vehicle of power supply and information on transmitted power from the power transmitter antenna to the target vehicle; and a determination unit (71, 401) configured to determine whether the received power with respect to the transmitted power is normal based on the information on the transmitted power and the information on the received power acquired by the acquisition unit, wherein the power-transmitter control unit is configured to, when the determination unit makes determination of not normal, stop energization of the power transmitter antenna even when determining that there is the power supply request.

2. The wireless power supply system of claim 1, wherein the power-transmitter control unit includes the acquisition unit and the determination unit, the vehicle-side signal includes the information on the received power, and the power-transmitter control unit is configured to acquire the information on the received power based on an output signal of the power-transmitter communication antenna when energizing the power transmitter antenna, acquire the information on the transmitted power when energizing the power transmitter antenna, determine whether the received power with respect to the transmitted power is normal based on the acquired information on the transmitted power and the acquired information on the received power, and stop energization of the power transmitter antenna when making determination of not normal, even when determining that there is the power supply request.

3. The wireless power supply system of claim 1, wherein the vehicle-side signal includes identification information for identifying the vehicle, the power-transmitter control unit is configured to associate the information on the transmitted power to the target vehicle with the identification information on the target vehicle based on the output signal from the power-transmitter communication antenna, in the target vehicle, the power-receiver control unit is configured to associate the information on the received power with the identification information of the target vehicle, the acquisition unit is configured to acquire the information on the transmitted power associated with the identification information of the target vehicle and the information on the received power associated with the identification information of the target vehicle, the determination unit is configured to determine whether the received power with respect to the transmitted power is normal based on the acquired identification information, the acquired information on the transmitted power, and the acquired information on the received power, and the power-transmitter control unit is configured to acquire the identification information of the target vehicle of which the determination unit makes determination of not normal, and stop energization of the power transmitter antenna based on the acquired identification information of the target vehicle and the output signal of the power-transmitter communication antenna, even when determining that there is the power supply request of the target vehicle.

4. The wireless power supply system of claim 3, wherein in the target vehicle, the power-receiver control unit is configured to acquire determination result information of the determination unit that is not normal, and lower an intensity of the power supply request signal that is supplied to the power-receiver communication antenna when acquiring the determination result information that is not normal.

5. The wireless power supply system according to claim 3, wherein in the target vehicle, the power-receiver control unit is configured to acquire determination result information of the determination unit that is not normal, and prevent supply of the power supply request signal to the power-receiver communication antenna when acquiring the determination result information that is not normal.

6. The wireless power supply system of any one of claims 3 to 5, wherein the determination unit is configured to, when making determination of not normal, instruct the power-receiver control unit of another vehicle near the target vehicle to transmit a stop request signal to request to stop power supply from the power transmitter antenna to the power receiver antenna.

7. The wireless power supply system of any one of claims 3 to 5 further comprising: a server (400) including the acquisition unit and the determination unit, wherein the power-transmitter control unit is configured to transmit, to the server, the transmitted power associated with the identification information of the target vehicle, in the target vehicle, the power-receiver control unit is configured to transmit, to the server, the received power associated with the identification information of the target vehicle, in the server, the determination unit is configured to transmit the identification information of the target vehicle to the power-transmitter control unit, and the power-transmitter control unit is configured to stop energization of the power transmitter antenna based on the received identification information of the target vehicle and the output signal of the power-transmitter communication antenna, even when determining that there is the power supply request from the target vehicle.

8. A program to be applied to a wireless power supply system (10) including a power transmitter device (20), which includes a power transmitter antenna (22), and a power receiver device (100), which is to be mounted on a vehicle (11) and includes a power receiver antenna (102), the wireless power supply system configured to wirelessly supply power from the power transmitter antenna to the power receiver antenna, the power receiver device including a power-receiver communication antenna (170) and a power-receiver control unit (230) configured to perform energization control of the power-receiver communication antenna to supply a vehicle-side signal, which includes a power supply request signal indicating power supply request to the power transmitter antenna, to the power-receiver communication antenna, the power transmitter device including a power-transmitter communication antenna (40), which is configured to wirelessly communicate with the power-receiver communication antenna, and a power-transmitter control unit (70), which is configured to perform energization control of the power transmitter antenna to wirelessly supply power to the power receiver antenna, the wireless power supply system including an acquisition unit (71, 401) and a determination unit (71, 401), the program configured to carry out: executing a process to cause the power-transmitter control unit to energize the power transmitter antenna when determining that there is power supply request based on an output signal from the power-transmitter communication antenna, the acquisition unit to acquire information on received power of the power receiver antenna in a target vehicle of power supply and information on transmitted power from the power transmitter antenna to the target vehicle, the determination unit to determine whether the received power with respect to the transmitted power is normal based on the information on the transmitted power and the information on the received power acquired by the acquisition unit, and the power-transmitter control unit to, when the determination unit makes determination of not normal, stop energization of the power transmitter antenna even when determining that there is the power supply request.

9. A control method for a wireless power supply system (10) including a power transmitter device (20), which includes a power transmitter antenna (22), and a power receiver device (100), which is to be mounted on a vehicle (11) and includes a power receiver antenna (102), the wireless power supply system configured to wirelessly supply power from the power transmitter antenna to the power receiver antenna, the power receiver device including a power-receiver communication antenna (170) and a power-receiver control unit (230) configured to perform energization control of the power-receiver communication antenna to supply a vehicle-side signal, which includes a power supply request signal indicating power supply request to the power transmitter antenna, to the power-receiver communication antenna, the power transmitter device including a power-transmitter communication antenna (40), which is configured to wirelessly communicate with the power-receiver communication antenna, and a power-transmitter control unit (70), which is configured to perform energization control of the power transmitter antenna to wirelessly supply power to the power receiver antenna, the wireless power supply system including an acquisition unit (71, 401) and a determination unit (71, 401), the control method comprising: executing a process to cause the power-transmitter control unit to energize the power transmitter antenna when determining that there is power supply request based on an output signal from the power-transmitter communication antenna, the acquisition unit to acquire information on received power of the power receiver antenna in a target vehicle of power supply and information on transmitted power from the power transmitter antenna to the target vehicle, the determination unit to determine whether the received power with respect to the transmitted power is normal based on the information on the transmitted power and the information on the received power acquired by the acquisition unit, and the power-transmitter control unit to, when the determination unit makes determination of not normal, stop energization of the power transmitter antenna even when determining that there is the power supply request.

10. A power transmitter device to be applied to a wireless power supply system, the wireless power supply system including a ground-side device and a vehicle-side device, one of the ground-side device and the vehicle-side device being the power transmitter device (20) including a power transmitter antenna (22), the other of the ground-side device and the vehicle-side device being a power receiver device (100) including a power receiver antenna (102), the wireless power supply system configured to transmit a vehicle-side signal, which includes a power supply request signal for power supply request from the power receiver device to the power transmitter device, and energize the power transmitter antenna to perform wireless power supply to the power receiver antenna when the power transmitter device determines that there is power supply request based on the received vehicle-side signal, the vehicle-side signal including information on received power of the power receiver antenna in a target vehicle of power supply, the power transmitter device configured to receive the power supply request signal, which is wirelessly transmitted from a power-receiver communication antenna (170) of the power receiver device, by a power-transmitter communication antenna (40), the power transmitter device comprising: a power-transmitter control unit (70) configured to acquire the information on the received power based on an output signal of the power-transmitter communication antenna when energizing the power transmitter antenna, acquire information on transmitted power from the power transmitter antenna to the target vehicle when energizing the power transmitter antenna, determine whether the received power with respect to the transmitted power is normal based on the acquired information on the transmitted power and the acquired information on the received power, and stop energization to the power transmitter antenna when making determination of not normal, even when determining that there is the power supply request.

11. A program to be applied to a power transmitter device, which is to be applied to a wireless power supply system, the wireless power supply system including a ground-side device and a vehicle-side device, one of the ground-side device and the vehicle-side device being the power transmitter device (20) including a power transmitter antenna (22), the other of the ground-side device and the vehicle-side device being a power receiver device (100) including a power receiver antenna (102), the wireless power supply system configured to transmit a vehicle-side signal, which includes a power supply request signal for power supply request from the power receiver device to the power transmitter device, and energize the power transmitter antenna to perform wireless power supply to the power receiver antenna when the power transmitter device determines that there is power supply request based on the received vehicle-side signal, the power transmitter device configured to receive the power supply request signal, which is wirelessly transmitted from a power-receiver communication antenna (170) of the power receiver device, by a power-transmitter communication antenna (40), the vehicle-side signal including information on received power of the power receiver antenna in a target vehicle of power supply, the power transmitter device including a power-transmitter control unit (70), the program configured to carry out: executing a process to cause the power-transmitter control unit to acquire the information on the received power based on an output signal of the power-transmitter communication antenna when energizing the power transmitter antenna, acquire information on transmitted power from the power transmitter antenna to the target vehicle when energizing the power transmitter antenna, determine whether the received power with respect to the transmitted power is normal based on the acquired information on the transmitted power and the acquired information on the received power, and stop energization to the power transmitter antenna when making determination of not normal, even when determining that there is the power supply request.

12. A control method for a power transmitter device to be applied to a wireless power supply system, the wireless power supply system including a ground-side device and a vehicle-side device, one of the ground-side device and the vehicle-side device being the power transmitter device (20) including a power transmitter antenna (22), the other of the ground-side device and the vehicle-side device being a power receiver device (100) including a power receiver antenna (102), the wireless power supply system configured to transmit a vehicle-side signal, which includes a power supply request signal for power supply request from the power receiver device to the power transmitter device, and energize the power transmitter antenna to perform wireless power supply to the power receiver antenna when the power transmitter device determines that there is power supply request based on the received vehicle-side signal, the power transmitter device configured to receive the power supply request signal, which is wirelessly transmitted from a power-receiver communication antenna (170) of the power receiver device, by a power-transmitter communication antenna (40), the vehicle-side signal including information on received power of the power receiver antenna in a target vehicle of power supply, the power transmitter device including a power-transmitter control unit (70), the control method comprising: executing a process to cause the power-transmitter control unit to acquire the information on the received power based on an output signal of the power-transmitter communication antenna when energizing the power transmitter antenna, acquire information on transmitted power from the power transmitter antenna to the target vehicle when energizing the power transmitter antenna, determine whether the received power with respect to the transmitted power is normal based on the acquired information on the transmitted power and the acquired information on the received power, and stop energization to the power transmitter antenna when making determination of not normal, even when determining that there is the power supply request.

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