A server includes: a communicator configured to communicate with a plurality of ground power supply devices configured to transmit electric power to a vehicle in a non-contact manner; a storage configured to store at least information on a total power supply amount within a predetermined period of the ground power supply devices; and one or more processors configured to, when a total power supply amount within a predetermined period of one ground power supply device among the ground power supply devices is equal to or greater than a determination threshold value set based on data of the total power supply amount within the predetermined period of the ground power supply devices, determine that stealing or leakage of electricity has occurred in the one ground power supply device.

A server includes: a communicator configured to communicate with a plurality of ground power supply devices configured to transmit electric power to a vehicle in a non-contact manner; a storage configured to store at least information on a total power supply amount within a predetermined period of the ground power supply devices; and one or more processors configured to, when a total power supply amount within a predetermined period of one ground power supply device among the ground power supply devices is equal to or greater than a determination threshold value set based on data of the total power supply amount within the predetermined period of the ground power supply devices, determine that stealing or leakage of electricity has occurred in the one ground power supply device.

A method for bringing a vehicle closer to a vehicle-external primary charging unit configured to inductively charge the vehicle, where the vehicle includes a secondary charging unit, a camera system and a display device, includes the steps of a) capturing a real-time image of a vehicle environment using the camera system, wherein the primary charging unit is included in the real-time image, b) displaying the real-time image on the display device, and c) inserting at least one guide line into the real-time image. The direction and/or curvature of the guide line coincides with a steering angle lock of the vehicle such that the guide line corresponds to the trajectory of the vehicle in the case of the steering angle lock. The position of the at least one guide line in the real-time image of the vehicle environment is selected such that the guide line indicates a movement curve of the secondary charging unit of the vehicle. The method further includes indicating the movement curve of the secondary charging unit relative to the primary charging unit based on a movement of the vehicle by repeating steps a) to c).

A method for bringing a vehicle closer to a vehicle-external primary charging unit configured to inductively charge the vehicle, where the vehicle includes a secondary charging unit, a camera system and a display device, includes the steps of a) capturing a real-time image of a vehicle environment using the camera system, wherein the primary charging unit is included in the real-time image, b) displaying the real-time image on the display device, and c) inserting at least one guide line into the real-time image. The direction and/or curvature of the guide line coincides with a steering angle lock of the vehicle such that the guide line corresponds to the trajectory of the vehicle in the case of the steering angle lock. The position of the at least one guide line in the real-time image of the vehicle environment is selected such that the guide line indicates a movement curve of the secondary charging unit of the vehicle. The method further includes indicating the movement curve of the secondary charging unit relative to the primary charging unit based on a movement of the vehicle by repeating steps a) to c).

The vehicle control device controls a vehicle configured to receive power by non-contact from a power transmission coil when passing over the power transmission coil. The vehicle control device includes a processor configured to set a target speed of the vehicle in a power supply area where the power transmission coil is installed. The processor is configured to lower the target speed when at least one predetermined condition is satisfied, compared to when the at least one predetermined condition is not satisfied. The at least one predetermined condition includes a first condition relating to a running environment around the vehicle.

The vehicle control device controls a vehicle configured to receive power by non-contact from a power transmission coil when passing over the power transmission coil. The vehicle control device includes a processor configured to set a target speed of the vehicle in a power supply area where the power transmission coil is installed. The processor is configured to lower the target speed when at least one predetermined condition is satisfied, compared to when the at least one predetermined condition is not satisfied. The at least one predetermined condition includes a first condition relating to a running environment around the vehicle.

A work system includes a plurality of working machines each including a working unit; and a power feeding device configured to supply power to the plurality of working machines. The plurality of working machines includes a plurality of types of working machines different in amount of power required to drive the working unit. The power feeding device includes at least one first power transmission unit configured to wirelessly transmit power to a working area of the plurality of working machines. Each of the plurality of working machines includes a power reception unit configured to receive the power wirelessly transmitted to the working area.

A work system includes a plurality of working machines each including a working unit; and a power feeding device configured to supply power to the plurality of working machines. The plurality of working machines includes a plurality of types of working machines different in amount of power required to drive the working unit. The power feeding device includes at least one first power transmission unit configured to wirelessly transmit power to a working area of the plurality of working machines. Each of the plurality of working machines includes a power reception unit configured to receive the power wirelessly transmitted to the working area.

Provided is a contactless power supply system including a transmission-side resonance circuit configured to transmit electric power, a reception-side resonance circuit configured to receive the electric power from the transmission-side resonance circuit, an alternating current magnetic field generation circuit configured to generate an alternating current magnetic field for detecting a relative positional relationship between the transmission-side resonance circuit and the reception-side resonance circuit, and a magnetic field detector configured to detect the alternating current magnetic field. The contactless power supply system performs contactless electric power transmission of magnetic field resonance coupling between a ground-side device and a mobile body. A frequency of the position detecting alternating current magnetic field is different from a resonance frequency of each of the transmission-side resonance circuit and the reception-side resonance circuit.

Provided is a contactless power supply system including a transmission-side resonance circuit configured to transmit electric power, a reception-side resonance circuit configured to receive the electric power from the transmission-side resonance circuit, an alternating current magnetic field generation circuit configured to generate an alternating current magnetic field for detecting a relative positional relationship between the transmission-side resonance circuit and the reception-side resonance circuit, and a magnetic field detector configured to detect the alternating current magnetic field. The contactless power supply system performs contactless electric power transmission of magnetic field resonance coupling between a ground-side device and a mobile body. A frequency of the position detecting alternating current magnetic field is different from a resonance frequency of each of the transmission-side resonance circuit and the reception-side resonance circuit.