Abstract: A wireless power supply system includes: a wireless power transmitting device configured to include a variable resonant circuit having a variable-controllable resonant frequency characteristic, and to transmit electric power wirelessly via the variable resonant circuit; a power transmission control unit configured to variably control the resonant frequency characteristic of the variable resonant circuit; and a plurality of wireless power receiving devices configured to include respective unique resonant circuits having respective unique resonant frequency characteristics which are different to each other, and to wirelessly receive power from the wireless power transmitting device by a magnetic field resonance mode arising as a result of the unique resonant circuit tuning to a resonant frequency of the variable resonant circuit.

Abstract: A wireless power transfer system includes a plurality of power sources and at least one power receiver, in which power transfer from the power sources to the power receiver is performed in wireless by using magnetic field resonance or electric field resonance. In the system, one of the plurality of power sources is designated as a master power source and the other one or more power sources are designated as slave power sources. In addition, the master power source controls the plurality of power sources and the at least one power receiver to perform the power transfer. This allows the system to perform the power transfer in an optimum state.

Abstract: A power receiving apparatus includes a power reception circuit, a first member having a cylindrical shape, a power receiving coil disposed on a cylinder side surface of the first member and connected through wires to the power reception circuit, and a resonance coil configured to be freely movable along the cylinder side surface in a circumferential direction around a cylinder center axis of the first member, wherein the power receiving coil and the resonance coil are coupled to each other through electromagnetic induction.

Abstract: A power receiving apparatus includes a plurality of resonance coils, a power receiving circuit, and a single wire configured to start at a first terminal of the power receiving circuit and to end at a second terminal of the power receiving circuit, the single wire forming one coil or a plurality of coils connected in series, wherein the one coil or the plurality of coils connected in series and the plurality of resonance coils are placed such that the one coil or the plurality of coils connected in series are couplable to the plurality of resonance coils.

Abstract: A power transmission device has: a plurality of power transmission units which perform wireless power transmission of strong-coupling system; a communication unit which, when the plurality of power transmission units transmit power at different timings to a power reception device, receives from the power reception device a plurality of reception power values of power each received by the power reception device and posture information of the power reception device; and a control unit which calculates a plurality of efficiencies based on power values of power transmitted by the plurality of power transmission units and the received plurality of reception power values, obtains a plurality of equal efficiency surfaces with respect to the plurality of power transmission units based on the plurality of efficiencies and the received posture information, and estimates that the power reception device is present at a position where the plurality of equal efficiency surfaces intersect.

Abstract: A power transmission device includes a power supply unit configured to supply power by a resonance frequency for magnetic resonance; a power transmission resonance coil capable of magnetic resonance with a power reception resonance coil in the resonance frequency, the power transmission resonance coil being configured to supply the power from the power supply unit as magnetic field energy caused by the magnetic resonance; a temperature detector provided in the power transmission resonance coil; and a control unit configured to refer to a table stored in a memory expressing an allowable temperature range, determine whether a detected temperature detected by the temperature detector at an elapsed time is within the allowable temperature range at the elapsed time, and stop an operation of the power supply unit when the detected temperature is not within the allowable temperature range.

Abstract: A non-contact charging apparatus configured to, vary the inductance and the capacitance of the matching unit for matching the impedance of the power supply system that supplies alternate current power and the impedance of the power transmitting/receiving system including a power transmitting unit and a power receiving apparatus according to the variable information.

Abstract: In a non-contact charging method, variable information with which a resonance frequency of a resonance circuit of an equipment device having maximum charging power as the power transmitting frequency, and a resonance frequency or a Q value of a resonance circuit of a power receiving unit of an equipment device other than the equipment device having the maximum charging power as a resonance frequency or a Q value for charging depending on each charging power, and transmits to each equipment device variable information corresponding to each equipment device.

Abstract: A power transmission apparatus includes a cover part attached to one of a power transmitter and an electronic apparatus, the power transmitter including a primary-side coil connected to an alternating-current power supply and a primary-side resonant coil configured to receive power from the primary-side coil by electromagnetic induction, the electronic apparatus including a secondary-side coil; and a secondary-side resonant coil disposed in the cover part, and configured to transmit to the secondary-side coil the power received from the primary-side resonant coil by magnetic field resonance generated between the primary-side resonant coil and the secondary-side resonant coil.

Abstract: A wireless electric power supply method includes: supplying electric power from a power supply section to a power-transmission resonance coil at a resonance frequency which causes magnetic field resonance; transmitting the electric power, supplied from the power supply section, as magnetic field energy from the power-transmission resonance coil to a power-reception resonance coil by using the magnetic field resonance, the power-transmission resonance coil being capable of being in magnetic field resonance with the power-reception resonance coil at the resonance frequency; monitoring the electric power supply by using a monitor section; comparing, by using a comparison section, the monitoring result obtained by the monitor section with characteristics data indicating the characteristics of the electric power supply performed by the power supply section; and controlling, by using a control section, the electric power supply performed by the power supply section, on the basis of the comparison result obtained by

Abstract: Cellular phones include a power reception resonance coil arranged inside a first outer surface side of a housing, a power extracting unit for extracting power of an induction current of the power reception resonance coil, a magnetic core that has one end arranged inside the first outer surface side and the other end arranged inside a second outer surface side of the housing, and penetrates into the power reception resonance coil, and a printed board that is arranged in a space between the first outer surface and the second outer surface and has an area where circuit elements are not arranged on a periphery of the core.

Abstract: A portable apparatus includes a case, a coil situated inside the case, a circuit disposed inside the case to receive power based on a first frequency via the coil and to perform communication based on a second frequency higher than the first frequency, and a magnetic shield having a first portion and a second portion stacked one over another in a direction perpendicular to the coil between the coil and an inside of the case, the second portion being closer to the coil than the first portion, wherein permeability of the first portion is higher than permeability of the second portion situated toward the coil with respect to the first frequency.

Abstract: In a resonant frequency control method in a magnetic field resonant coupling type power transmission system transmitting an electric power from a power transmitting coil to a power receiving coil using magnetic field resonance, a high-speed, accurate and real-time adjustment of the resonant frequency of a coil is realized. The phase of a voltage supplied to a power transmitting coil and the phase of a current that flows in the power transmitting coil or a power receiving coil is detected and the resonant frequency of the power transmitting coil or the power receiving coil is varied such that the phase difference between them becomes a target value.

Abstract: Cellular phones include a power reception resonance coil arranged inside a first outer surface side of a housing, a power extracting unit for extracting power of an induction current of the power reception resonance coil, a magnetic core that has one end arranged inside the first outer surface side and the other end arranged inside a second outer surface side of the housing, and penetrates into the power reception resonance coil, and a printed board that is arranged in a space between the first outer surface and the second outer surface and has an area where circuit elements are not arranged on a periphery of the core.

Abstract: A wireless power transmitting device includes a housing configured to have a feeding surface on which a power receiving device is to be placed; a power transmitting coil disposed inside the housing and configured to have a central axis that intersects with the feeding surface; and an alternating-current power supply configured to supply power to the power transmitting coil, wherein the feeding surface has raised and recessed portions in an area corresponding to a region inside an outer region of the power transmitting coil.

Abstract: A magnetic resonance power transmitter of a magnetic resonance wireless power transmission system includes a resonance coil, an alternating current power source configured to cause the resonance coil to generate an alternating current, and a frequency changer configured to change, based on communication data, a frequency of the alternating current that the alternating current power source causes the resonance coil to generate.

Abstract: A power transmitting device includes a power transmitting coil having a resonance point different from that of a power receiving resonant coil, which transmits power supplied from a power supply unit as magnetic field energy to the power receiving resonant coil which resonates at a resonant frequency causing magnetic field resonance. A power receiving device includes the power receiving resonant coil which receives the magnetic field energy transmitted from the power transmitting coil at the resonant frequency.

Abstract: A wireless power supply includes: a power transmitting coil resonant at a first resonant frequency that generates a magnetic field resonance, a power receiving coil resonant at the first resonant frequency, a power receiving unit that outputs energy received by the power receiving resonant coil; a distance detector that detects a distance between the power transmitting resonant coil and the power receiving resonant coil; a power transmitting frequency controller that changes the first resonant frequency to a second resonant frequency on the basis of the distance detected by the distance detector; and a power receiving frequency controller that changes the first resonant frequency of the power receiving resonant coil from the first resonant frequency to a second resonant frequency on the basis of the distance detected by the distance detector.

Abstract: A power transmission device includes a power supply unit configured to supply power by a resonance frequency for magnetic resonance; a power transmission resonance coil capable of magnetic resonance with a power reception resonance coil in the resonance frequency, the power transmission resonance coil being configured to supply the power from the power supply unit as magnetic field energy caused by the magnetic resonance; a temperature detector provided in the power transmission resonance coil; and a control unit configured to refer to a table stored in a memory expressing an allowable temperature range, determine whether a detected temperature detected by the temperature detector at an elapsed time is within the allowable temperature range at the elapsed time, and stop an operation of the power supply unit when the detected temperature is not within the allowable temperature range.

Abstract: A wireless power supply system includes: a wireless power transmitting device configured to include a variable resonant circuit having a variable-controllable resonant frequency characteristic, and to transmit electric power wirelessly via the variable resonant circuit; a power transmission control unit configured to variably control the resonant frequency characteristic of the variable resonant circuit; and a plurality of wireless power receiving devices configured to include respective unique resonant circuits having respective unique resonant frequency characteristics which are different to each other, and to wirelessly receive power from the wireless power transmitting device by a magnetic field resonance mode arising as a result of the unique resonant circuit tuning to a resonant frequency of the variable resonant circuit.