Abstract: A conductor (31) wound into a multiple-layered helical shape, and an insulating member (32) provided between layers of the conductor are provided.

Abstract: A power reception device includes: a power reception coil that receives power by magnetic resonance; a power reception circuit that converts power received by the power reception coil into direct current; a load circuit that operates by the power into which the power is converted by the power reception circuit; a first substrate on which the power reception coil and the power reception circuit are mounted; and a second substrate on which the load circuit is mounted, the second substrate being located outside the power reception coil as viewed in an axial direction of the power reception coil.

Abstract: Included are a power transmission unit for starting power supply to multiple transmission antennas in conjunction with a lighting switch when the lighting switch is operated; and an antenna determination unit for determining a power transmission target antenna with which the power supply from the power transmission unit is to be continued, from among the multiple transmission antennas to which the power supply has been started.

Abstract: Included are: a reception antenna capable of receiving power from a transmission antenna in a non-contact manner; and a closed-curve structure which does not form a short loop and at least a part of which is formed of a conductive material, the closed-curve structure being formed at a position where, when the reception antenna is installed at a position where power can be received from the transmission antenna, the closed-curve structure interlinks with a magnetic field generated by the transmission antenna.

Abstract: Included are: a power reception apparatus, including: a reception antenna capable of receiving power from any of multiple transmission antennas in a non-contact manner; a power supply unit; and an activation signal transmitting unit for transmitting an activation signal to a power transmission device when supplied with power from the power supply unit and an operation instruction is received; and the power transmission device including: an activation signal receiving unit for receiving the activation signal; a power transmission unit for starting power supply to the multiple transmission antennas when the activation signal is received; and an antenna determination unit for determining a power transmission target antenna, in which non-contact power supply to the reception antenna of the power reception apparatus is performed with the power transmission unit supplying power to the power transmission target antenna.

Abstract: There are included: a switching parameter detecting unit (21) that detects a switching voltage of a switching element (Q1); and an abnormality detecting unit (a first comparing unit (264a) and an abnormality determining unit (265)) that detects an abnormality caused by foreign matter, on the basis of a result of the detection by the switching parameter detecting unit (21).

Abstract: A power reception device includes: a power reception coil that receives power by magnetic resonance; a power reception circuit that converts power received by the power reception coil into direct current; a load circuit that operates by the power into which the power is converted by the power reception circuit; a first substrate on which the power reception coil and the power reception circuit are mounted; and a second substrate on which the load circuit is mounted, the second substrate being located outside the power reception coil as viewed in an axial direction of the power reception coil.

Abstract: Disclosed is a resonance-type power reception device including a DC-DC converter (7) having an input terminal connected to a line (10), a switching circuit (5) for connecting or disconnecting a line (9) to which power is inputted to or from the line (10), and a switch control unit (6) for causing the switching circuit (5) to connect the line (9) to the line (10) after a voltage (V1) exceeds a threshold voltage (Vin(th)).

Abstract: A conductor (31) wound into a multiple-layered helical shape, and an insulating member (32) provided between layers of the conductor are provided.

Abstract: An inverter circuit (7) including a resonance circuit including an inductor and a capacitor and outputting power; and a transmitting antenna (2) transferring the power output by the inverter circuit are provided. The inverter circuit varies at least one of inductance of the inductor and capacitance of the capacitor in accordance with input impedance of the transmitting antenna.

Abstract: A receiving antenna (3) receiving power transferred from a transmitting antenna (2) is provided. Further, a receiving circuit (4) controlling an input impedance in accordance with mutual inductance between the transmitting antenna and the receiving antenna is provided.

Abstract: There are included: a switching parameter detecting unit (21) that detects a switching voltage of a switching element (Q1); and an abnormality detecting unit (a first comparing unit (264a) and an abnormality determining unit (265)) that detects an abnormality caused by foreign matter, on the basis of a result of the detection by the switching parameter detecting unit (21).

Abstract: A movable portion transmission system includes a transmitter and receiver having a transmission antenna to perform wireless transmission of electric power supplied thereto and a reception antenna to receive the electric power from the transmission antenna, a transmission power supply circuit to establish a resonance condition of the transmission antenna, and a reception power supply circuit to establish a resonance condition of the reception antenna. The transmission antenna includes a transmission side coil in a spiral shape which is arranged while being centered at the axial center of a rotary member, and the reception antenna includes a reception side coil in a spiral shape which is arranged with a gap therefrom to the transmission side coil while being centered at the axial center of the rotary member.

Abstract: A transmission/reception unit including a transmitting antenna and a receiving antenna for carrying out a wireless power transmission in cooperation with the transmitting antenna. Each of the transmitting antenna and the receiving antenna includes a coil which has a shape in which a portion through which a current flows in a direction extends along another portion through which a current flows in an opposite direction.

Abstract: Disclosed is a resonance type power transmission device in which a plurality of systems having respective transmitters and receivers 3 are arranged opposite to each other and each of the systems transmits electric power having a single frequency, each of the transmitters and receivers having a transmission antenna 5 and a reception antenna 6 which are disposed so as to be fitted to each other, and in which a magnetic sheet 7 is disposed in a portion between the systems, opposite to the transmitters and receivers 3 at a distance, from each of the transmitters and receivers 3, of 1/10 or more of the minimum of the outer diameters of the transmission antenna 5 and the reception antenna 6.

Abstract: A resonant coupling power transmission system includes a resonance type power transmission device 1 having a resonance type power supply 11 to supply power, and a resonance type transmission antenna 13 to transmit the power supplied by the resonance type power supply 11, and a resonance type power reception device 2 having a resonance type reception antenna 21 to receive the power transmitted by the resonance type transmission antenna 13, and a reception circuit 23 to supply the power received by the resonance type reception antenna 21 to a load, and the characteristic impedance of each of the functional units is set in such a way that there is provided a correlation among the resonance characteristic value of the resonance type power supply 11, that of the resonance type transmission antenna 13, and that of the resonance type power reception device 2.

Abstract: A configuration includes: resonance-type power source circuits provided for at least two electric paths, each including a power element that performs switching at a high frequency of 2 MHz or more, and a resonant circuit element that causes the power element to perform resonant switching; a phase-control-type matching circuits provided for the respective electric paths, each having a function of controlling a phase difference between output currents of the resonance-type power source circuits and a function of providing matching of resonance conditions between the resonance-type power source circuit and a load; and a combining unit that combines output currents processed by the phase-control-type matching circuits for the respective electric paths.

Abstract: Disclosed is a resonance type power transmission device in which a plurality of systems having respective transmitters and receivers 3 are arranged opposite to each other and each of the systems transmits electric power having a single frequency, each of the transmitters and receivers having a transmission antenna 5 and a reception antenna 6 which are disposed so as to be fitted to each other, and in which a magnetic sheet 7 is disposed in a portion between the systems, opposite to the transmitters and receivers 3 at a distance, from each of the transmitters and receivers 3, of 1/10 or more of the minimum of the outer diameters of the transmission antenna 5 and the reception antenna 6.

Abstract: Disclosed is a resonant type transmission power supply device including a transmission power state detecting circuit 11 to detect a transmission power state of a transmission antenna 2, a foreign object detecting circuit 124 to detect the presence or absence of a foreign object in an electromagnetic field generated from the transmission antenna 2 on the basis of a detection result acquired by the transmission power state detecting circuit 11, and a power control circuit 125 to reduce or stop the supply of electric power to the transmission antenna 2 when foreign object is detected by the foreign object detecting circuit 124.

Abstract: A transmission/reception unit including a transmitting antenna and a receiving antenna for carrying out a wireless power transmission in cooperation with the transmitting antenna. Each of the transmitting antenna and the receiving antenna includes a coil which has a shape in which a portion through which a current flows in a direction extends along another portion through which a current flows in an opposite direction.