Abstract: A contactless power feeding apparatus includes a plurality of primary coils mounted on a road and a power feed controller which uses a portion of the primary coils as a power transmitting coil to achieve delivery of electrical power from the power transmitting coil to a secondary coil mounted in a vehicle. The power feed controller uses a selected primary coil that is one of the primary coils other than the power transmitting coil to decrease a leakage of magnetic flux arising from excitation of the power transmitting coil. Instead of the selected primary coil, the secondary coil may be used to reduce the leakage of magnetic flux.

Abstract: A noncontact power supply system is provided with a mobile unit, a ground power supply apparatus configured to be able to supply power by noncontact to the mobile unit and a server configured to be able to communicate with the mobile unit and the ground power supply apparatus respectively. The server is configured to set a system utilization price of the noncontact power supply system based on the demand for power and, when an intent by the mobile unit for utilization of the noncontact power supply system at the system utilization price is confirmed, enable the mobile unit with a confirmed intent for utilization to be supplied with power by noncontact by sending information necessary for noncontact power supply to the mobile unit with a confirmed intent for utilization and ground power supply apparatus.

Abstract: A magnetic detection system is provided which is usable in a movable body including a power receiving system that receives power from a power transmission system by electromagnetic induction. The magnetic detection system includes at least one magnetic flux measuring unit that detects a magnetic flux including a magnetic source magnetic flux from a magnetic source disposed on the ground, and a signal processing unit that suppresses influence of a magnetic flux generated from the power receiving system on the magnetic flux measured by the magnetic flux sensor unit, to detect the magnetic source magnetic flux.

Abstract: A power transmission device for wireless power supply to a mobile power receiving device has an edge coil unit that includes an edge resonance circuit, the edge resonance circuit including an edge coil and an edge resonance capacitors; an edge current switching unit; an edge transmission request signal receiving unit; an edge transmission control unit; an adjacent coil unit that adjacent to the edge coil unit and includes an adjacent resonance circuit; the adjacent resonance circuit including an adjacent coil and an adjacent resonance capacitor; and an adjacent current switching unit for switching on and off state of the power supply from the power source to the adjacent resonance circuit; and an adjacent transmission control unit that controls the on and off state of the power supply from the power source to the adjacent resonance circuit using the adjacent current switching unit.

Abstract: In a coil position estimating apparatus, a past local-maximum position identifier identifies, from information indicative of how levels of first power received by a power receiving apparatus in the past change over time, at least one local maximum position along a road at which the received power became locally maximum in the past. A power-transmission coil position estimator estimates, based on the identified at least one local maximum position, at least one future local-maximum position as the position of the at least one power transmission coil. The at least one future local-maximum position corresponds to a level of second power to be received by the power receiving apparatus in a forward section of the road from the vehicle; the level of the second power is likely to become locally maximum.

Abstract: 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.

Abstract: A vehicle control device for an in-motion power transfer system that wirelessly powers a vehicle during travel is provided, where the in-motion power transfer system is equipped with power transmitting coils installed to a road and a power receiving coil installed to the vehicle. The vehicle control device includes a travel route setting unit configured to use a HD map to set a travel route that includes information regarding a lateral travel position of the vehicle on the road. The travel route setting unit is configured to set the travel route of the vehicle so that the vehicle is in a powerable state where the power receiving coil faces any one of the power transmitting coils when the vehicle travels in a powerable section, which is a section of the road where the power transmitting coils are embedded.

Abstract: A power transmission device used in an in-motion power supply system that supplies power to a vehicle in motion in a wireless manner, the power transmission device being disposed on a road based on a guide line, which is a line used when a travel route is set using an HD map in a travel route setting section, and is provided with a power transmission coil that supplies power to a power reception coil of the vehicle in a wireless manner, and a power transmission circuit that supplies power to the power transmission coil.

Abstract: A wireless power transfer system comprises: a power conversion unit generating power to be transmitted to a power reception coil; a power transmission unit group constituted by two or more power transmission units, each power transmission unit having a power transmission circuit including a power transmission coil; a control unit controlling supply of power from the power conversion unit to the power transmission unit group; and a position detection unit detecting a position of a mobile body. The control unit, based on position information, supplies power from the power conversion unit to a power transmission unit group that satisfies a power transmission condition including that a distance of the power transmission coil relative to the power reception coil of the mobile body is less than or equal to a predetermined threshold, and does not supply power to a power transmission unit group that does not satisfy the power transmission condition.

Abstract: A wireless power supply apparatus that supplies power to a reception apparatus in a wireless manner, the wireless power supply apparatus including: a power source apparatus that outputs an AC power, a transmission coil electrically connected to the power source apparatus; and a setting circuit interposed between the power source apparatus and the transmission coil, setting the transmission coil to be in either a power feeding state or a standby state, wherein the setting circuit is provided separately from the power source apparatus.

Abstract: A power transmission apparatus for wireless power transfer to a movable power receiving apparatus includes a power transmission resonator that includes a power transmission coil and a transmission resonance capacitor unit, and a power transmission circuit for supply of alternating-current power to the power transmission resonator. The power transmission apparatus includes a power-transfer request signal receiver configured to receive a power-transfer request signal transmitted from the power receiving apparatus, and a switching unit. The switching unit is configured to, when the power-transfer request signal receiver receives the power-transfer request signal, change an input impedance of the power transmission resonator to change a value of current flowing through the power transmission coil of the power transmission resonator to a controlled value enabled to transfer power from the power transmission coil to the power receiving apparatus.

Abstract: A contactless power supply system is provided for supplying electric power to a vehicle in a contactless manner during traveling of the vehicle. The contactless power supply system includes a plurality of primary coils installed along a traveling direction in a road and a secondary coil mounted to the vehicle. Each of the primary coils is a single-phase coil with the secondary coil being a multi-phase coil, or is a multi-phase coil with the secondary coil being a single-phase coil.

Abstract: A dynamic wireless power transfer system performs, through a plurality of primary coils installed along a traveling direction of a road and a secondary coil mounted in a vehicle, power transfer to the vehicle while the vehicle is traveling. The secondary coil is an M-phase coil including M coils, M denoting an integer which is two or higher. The M coils each include a coil end extending along a front-rear direction of the vehicle and a main coil portion extending along a width direction of the vehicle, the M coils each being configured such that a magnetic resistance of a magnetic path where a magnetic flux of the coil end passes is higher than a magnetic resistance of a magnetic path where a magnetic flux of the main coil portion passes.

Abstract: In an in-motion power supply system with a plurality of power supply segments to supply power to a vehicle, a vehicle position detection unit detects a position of the vehicle relative to each segment. An electrical characteristic acquisition unit acquires electrical characteristics in the segment involved in power transfer, and an abnormality determination unit uses the electrical characteristics to determine whether there is an abnormality in the segment involved in power transfer.

Abstract: A power supply system for moving body includes a first power source, a first current path, a second power source, a second current path. The first power source supplies electric power to a redundant load. The first current path connects the first power source and the redundant load. The second power source supplies electric power to the redundant load. The second current path connects the second power source and the redundant load.

Abstract: A power supply system for a mobile object, includes a normal power supply, a normal current path connected to the normal power supply, a redundant power supply, a redundant current path connected to the redundant power supply. The power supply system further includes a first current path connected to a first redundant load, and a second current path disposed in parallel with the first current path and connected to a second redundant load. The power supply system further includes a path switch including a first normal switch and a second normal switch, and a controller controlling the path switch. The normal power supply is connected to a normal load, and is connectable to at least one of the first redundant load and the second redundant load.

Abstract: A power supplying device includes a power transmission circuit transmitting AC power and a power transmission resonance circuit including a power transmission coil. A power receiving device includes a power reception resonance circuit including a power reception coil. When a coupling coefficient between the power transmission coil and the power reception coil is a predetermined coupling coefficient, resonance of a first resonance mode having a first resonance frequency and a second resonance mode having a second resonance frequency are generated, a resonance frequency of the power transmission resonance circuit and the power reception resonance circuit is set to a value which is one of the first and second resonance frequencies, and the set value is a frequency deviating from a reference resonance frequency of the power transmission resonance circuit alone by a predetermined deviation frequency or more. A driving frequency of the AC power is set to the set value.

Abstract: A magnetic detection system is provided which is usable in a movable body including a power receiving system that receives power from a power transmission system by electromagnetic induction. The magnetic detection system includes at least one magnetic flux measuring unit that detects a magnetic flux including a magnetic source magnetic flux from a magnetic source disposed on the ground, and a signal processing unit that suppresses influence of a magnetic flux generated from the power receiving system on the magnetic flux measured by the magnetic flux sensor unit, to detect the magnetic source magnetic flux.

Abstract: A power supply system having a plurality of power systems is provided with a power output section in each of the power systems, an electrical load in each of the power systems, operating from power supplied by the power output section, main paths that connect the power output sections of adjacent ones of the power systems, an inter-system switch that establishes a conducting condition between the adjacent power systems by being turned on and establishes a disconnected condition between the adjacent power systems by being turned off, and an intra-system switch in each of the power systems, which is disposed on the main path between the power output section and the inter-system switch, and which establishes a conducting condition between the power output section and the electrical load by being turned on and establishes a disconnected condition between the power output section and the electrical load by being turned off.

Abstract: A power supply system having a plurality of power systems is provided with a power output section in each of the power systems, an electrical load in each of the power systems, operating from power supplied by the power output section, main paths that connect the power output sections of adjacent ones of the power systems, an inter-system switch that establishes a conducting condition between the adjacent power systems by being turned on and establishes a disconnected condition between the adjacent power systems by being turned off, and an intra-system switch in each of the power systems, which is disposed on the main path between the power output section and the inter-system switch, and which establishes a conducting condition between the power output section and the electrical load by being turned on and establishes a disconnected condition between the power output section and the electrical load by being turned off.