A power feed system includes a computer that evaluates benefit obtained when a power feed mat is placed, for each of a plurality of locations within a subject region where the power feed mat can be placed, the power feed mat being configured to wirelessly feed power to a movable body. In a power feed method using such a computer, a display shows a result of evaluation of the benefit for each location within the subject region evaluated by the computer.

In an embodiment, an apparatus for charging an electric vehicle, can include a receptacle mountable to a structure above the electric vehicle. The receptacle can maintain a charge transmitting device, which can be automatically moveable and directable from the receptacle toward a target area on the electric vehicle associated with a receiving coil mounted on the electric vehicle for the charging of an electric vehicle when the one receiving coil engages with the charge transmitting device when the electric vehicle is located below the receptacle. One or more optical sensors can be utilized to direct the charge transmitting device toward the target.

A power feed system includes a power feed mat. The power feed mat includes a plurality of power transmission coils. The power feed mat is configured to feed power to at least one movable body on the power feed mat by using at least one of the plurality of power transmission coils. The power feed system further includes a computer. When the computer restricts power feed to at least one movable body among a plurality of movable bodies on the power feed mat, the computer selects the at least one movable body power feed to which is to be restricted, based on a priority of each of the plurality of movable bodies.

A system for charging one or more batteries of a vehicle may include a charging box mounted to a vehicle to facilitate connection to a charge coupler from under the vehicle. The charge coupler may be configured to provide an electrical connection between an electrical power source and the charging box. A vehicle including the charging box may maneuver to a position above the charge coupler, after which electrical contacts of the charging box and the charge coupler may be brought into contact with one another. The charge coupler and/or the charging box may be configured to provide electrical communication between the electrical power source and the one or more batteries, so that the electrical power source may charge one or more of the batteries. Thereafter, the electrical contacts may be separated from one another, and the vehicle may maneuver away from the charge coupler.

A system for charging one or more batteries of a vehicle may include a charging box mounted to a vehicle to facilitate connection to a charge coupler from under the vehicle. The charge coupler may be configured to provide an electrical connection between an electrical power source and the charging box. A vehicle including the charging box may maneuver to a position above the charge coupler, after which electrical contacts of the charging box and the charge coupler may be brought into contact with one another. The charge coupler and/or the charging box may be configured to provide electrical communication between the electrical power source and the one or more batteries, so that the electrical power source may charge one or more of the batteries. Thereafter, the electrical contacts may be separated from one another, and the vehicle may maneuver away from the charge coupler.

A power transfer system includes: a compact mobility; a ground unit disposed on a second lane which is a driving lane for the compact mobility, the ground unit being capable of wireless power transfer; and a controller that controls the ground unit. The compact mobility has an amount of electric power that can be stored less than a predetermined amount, and travels at a speed dependent on electric power wirelessly received from the ground unit. When a pedestrian is sensed in the second lane, the controller forces the compact mobility to decelerate by reducing transmission power from the ground unit to the compact mobility, as compared to when the pedestrian is not sensed in the second lane.

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.

A vehicle for receiving power by noncontact from a power transmission apparatus of a ground power supplying apparatus, has: a power reception apparatus for receiving power from the power transmission apparatus; a vehicle side communication device for transmitting a signal including identification information of the vehicle to the ground power supplying apparatus by short range wireless communication; a lateral deviation detection device for detecting a deviation in a relative position of the power reception apparatus with respect to the power transmission apparatus; and a vehicle side control device for controlling the vehicle side communication device. The vehicle side control device controls the vehicle side communication device so that power is not transmitted from the ground power supplying apparatus when the deviation is detected.

A vehicle enabling confirmation of an end of power transfer from a ground power supplying apparatus at the vehicle side, that is, a vehicle receiving power from a ground power supplying apparatus by noncontact, provided with a power reception apparatus for receiving power from the ground power supplying apparatus and a control device configured to judge an end of power transfer from the ground power supplying apparatus based on a change along with time of received power received by the power reception apparatus.