A power receiving device includes: a power receiving unit moved between a first position and a second position and receiving electric power in the second position from a power transmitting unit contactlessly; a movement mechanism moving the power receiving unit to the first position and the second position; and a sensing unit provided at a vehicular body independently of the power receiving unit and sensing the intensity of one of a magnetic field and an electric field formed by the power transmitting unit. The second position is obliquely below the first position with respect to the vertical direction, and the second position has a shorter distance to the sensing unit than the first position.

A contactless power supply system includes: a power supply pad including a power supply core formed of a magnetic material, and a power supply coil that uses the power supply core as a magnetic path; and a filter circuit including an inductor coil, the filter circuit being connected to the power supply pad. The power supply pads to which the respective filter circuits are connected are brought into a face-to-face relation so that electric power is transmitted from one power supply pad to the other power supply pad in a contactless manner. An inductor coil of at least either one of the filter circuits is provided to the power supply core of the power supply pad to which the filter circuit is connected, and the inductor coil uses the power supply core as a magnetic path.

A conductor arrangement for producing an electromagnetic field and thereby transferring energy to vehicles driving on a surface of a route, in particular for transferring energy to road automobiles is disclosed. The conductor arrangement includes a first, lower coating layer, a second upper coating layer, and at least one electric line whichif arranged as part of the routeextends under the surface of the route in and/or about the travelling direction of the vehicles. The at least one electric line is arranged in between the lower and upper coating layer.

Provided are an electric automobile to which a power supply device supplies power, and an electricity supply system capable of accurately associating the power supply device and the electric automobile carrying out communication therewith. A power supply-side control unit (24) controls such that electricity that a power supply unit (21) supplies reaches a first electricity quantity Pa before a power supply-side communications unit (23) receives a request signal from a vehicle-side communications unit (43), and controls such that electricity that the power supply unit (21) supplies reaches a second electricity quantity Pb, which is greater than the first electricity quantity Pa, after the power supply-side communications unit (23) receives the request signal from the vehicle-side communications unit (43). The vehicle-side communications unit (43) activates on the basis of the first electricity quantity Pa received from the power supply unit (21) of a power supply device (2).

A vehicle includes: a wireless power receiver that receives power in a wireless manner from a plurality of wireless power transmitters arranged at predetermined intervals in a vehicle traveling direction on a traveling path; a rotating electric machine capable of generating driving force for traveling; an inverter that exchanges power with the rotating electric machine; a first power supply; a second power supply having higher output density and lower capacity density than the first power supply; and a DC-DC converter that exchanges power with the second power supply. Further, the wireless power receiver, the inverter, the DC-DC converter, and the first power supply are electrically connected in parallel to a power bus that supplies the power from the wireless power receiver to the inverter, and the second power supply and the power bus are electrically connected via the DC-DC converter.

A mobile solar charging facility. The present invention relates to power supply and charging techniques for a mobile electric apparatus during movement, and in particular to such a facility having a combined technique of a solar photovoltaic battery and solar thermal power generation, and matching techniques and extended applications related to light compensation, energy storage, etc. The present invention is aimed at solving the problem of charging an electric vehicle when traveling. A highly cost-effective solar power source is used for power supply. The technical solutions of a contact rail and a collector shoe are used for mobile power supply and charging. An arc extinction circuit and an energy storage super-capacitor are provided in a line, and a safety protection measure is provided. A condenser lens and a compensation lens which can increase a power generation amount and do not need to be tracked as provided for solar power generation.

A power supply device for a vehicle includes at least one contact head which can be connected to a vehicle and can be brought in contact with a docking station, wherein a contact head roll mechanism is rotatably connected to the at least one contact head and connected so as to be able to be brought in contact with the docking station, where the contact head roll mechanism includes at least two rolls or at least two rollers, via which a rolling contact can be established between the at least one contact head and the docking station, and where a first roll or a first roller is arranged on a first flank of the at least one contact head, and a second roll or a second roller is arranged on a second flank, located across the first flank, of the at least one contact head.

A battery pack for use in an electric machine, includes a first receiving antenna including a first inductor for receiving electric power from a power supply source located outside the electric machine by coupling with a first resonant magnetic field generated by the power supply source; and a transferring antenna including a second inductor for generating a second resonant magnetic field by the radio-frequency power. A primary surface of the first inductor is located within the battery pack and is parallel to a first plane of the battery pack. A primary surface of the second inductor is located within the battery pack and is parallel to a second plane of the battery pack. The second plane facing the second inductor intersects with the first plane facing the first inductor at an angle of a range of between 45 and 90 including 45 and 90.

A contactless power transmission device includes a switching unit that switches a power transmission line so that a first power is transmitted through the first line when an AC power supply outputs a first AC power and so that a second power is transmitted through a second line when the AC power supply outputs a second AC power. An impedance conversion unit is arranged on the second line that converts an impedance from an output of the AC power supply to a variable load when the second power is transmitted through the second line to approach an impedance from the output of the AC power supply to the variable load when the first power is transmitted through the first line.

A wireless power supply system is a wireless power supply system provided with a travel lane for wirelessly transmitting power to a moving body and includes a power transmitting coil that is disposed such that the axial direction of the coil is substantially parallel to the width direction of the travel lane, and electromagnetic shielding walls that are disposed on the respective sides of the travel lane in the extension direction of the travel lane.