Wireless power supply apparatus
AssigneeAdvantest Corporation
InventorsYasuo FURUKAWA, Yuki ENDO
Life of this patent
Estimating the term…
Abstract
A wireless power supply apparatus generates an electric signal frequency-modulated or otherwise phase-modulated according to a transmission-side code that is determined beforehand with a wireless power reception apparatus. The electric signal thus generated is transmitted via a transmission coil so as to generate an electric power signal including any one of an electric field, a magnetic field, and an electromagnetic field. The wireless power reception apparatus receives the electric power signal using a reception coil. A control unit changes the impedance of a resonance circuit that comprises the reception coil and a resonance capacitor, according to a reception-side code that is to correspond to the transmission-side code.
Claims15
A wireless power reception apparatus configured to receive an electric power signal, including any one of an electric field, a magnetic field, and an electromagnetic field, frequency-modulated or otherwise phase-modulated according to a given transmission-side code, and transmitted from a power supply apparatus, the wireless power reception apparatus comprising:
- a reception coil configured to receive the electric power signal;
- a resonance capacitor that, together with the reception coil, forms a resonance circuit;
- and
- a control unit configured to change the impedance of the resonance circuit based upon a reception-side code that is to correspond to the transmission-side code used in the power supply apparatus such that resonance occurs between the resonance circuit and the electric power signal.
A wireless power supply apparatus configured to transmit an electric power signal to a wireless power reception apparatus, the wireless power supply apparatus comprising:
- a modulator configured to generate an electric signal that is frequency-modulated or otherwise phase-modulated according to a transmission-side code that is determined beforehand with the wireless power reception apparatus;
- and
- a transmission unit configured to transmit the electric power signal via a transmission coil so as to generate an electric power signal including any one of an electric field, a magnetic field, and an electromagnetic field.
A wireless power supply system comprising:
- a wireless power supply apparatus configured to transmit an electric power signal including any one of an electric field, a magnetic field, and an electromagnetic field, frequency-modulated or otherwise phase-modulated according to a given transmission-side code;
- and
- a wireless power reception apparatus configured to receive the electric power signal, wherein
- the wireless power supply apparatus comprises:
- a modulator configured to generate an electric signal that is frequency-modulated or otherwise phase-modulated according to a transmission-side code that is determined beforehand with the wireless power reception apparatus;
- and
- a transmission unit configured to transmit the electric power signal via a transmission coil so as to generate an electric power signal including any one of an electric field, a magnetic field, and an electromagnetic field, and wherein
- the wireless power reception apparatus comprises:
- a reception coil configured to receive the electric power signal;
- a resonance capacitor that, together with the reception coil, forms a resonance circuit;
- and
- a control unit configured to change the impedance of the resonance circuit based upon a reception-side code that is to correspond to the transmission-side code used in the power supply apparatus such that resonance occurs between the resonance circuit and the electric power signal.
A power supply method comprising:
- at a power supply apparatus, generating an electric signal frequency-modulated or otherwise phase-modulated according to a transmission-side code that is determined beforehand with a power reception apparatus;
- at the power supply apparatus, transmitting the electric signal via a transmission coil, and generating an electric power signal including any one of an electric field, a magnetic field, and an electromagnetic field;
- at the power reception apparatus, receiving the electric power signal via a reception coil;
- and
- at the power reception apparatus, changing the impedance of a resonance circuit that comprises the reception coil and a resonance capacitor according to a reception-side code that is to correspond to the transmission-side code, such that resonance occurs between the resonance circuit and the electric power signal.
Dependencies are inferred from the claim text.