Wireless power supply apparatus
AssigneeAdvantest Corporation
InventorsYuki Endo, Yasuo Furukawa
Life of this patent
Estimating the term…
Abstract
A wireless power supply apparatus transmits an electric power signal including any one of an electric field, a magnetic field, and an electromagnetic field. A bridge circuit includes multiple switches. A control unit performs switching control of the multiple switches of the bridge circuit at a first frequency configured as a transmission frequency. A transmission coil and a resonance capacitor form a resonance antenna, which is connected to the bridge circuit. The resonance frequency of the resonance antenna thus formed is a second frequency that is equal to or higher than the first frequency. A control unit is configured to be capable of adjusting the length of the dead time during which the multiple switches are all turned off at the same time.
Claims6
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, the wireless power supply apparatus comprising:
- a bridge circuit comprising a plurality of switches;
- a control unit configured to perform, at a first frequency configured as a transmission frequency, switching control of the plurality of switches included in the bridge circuit;
- and
- a resonance antenna connected to the bridge circuit, comprising a transmission coil configured to transmit an electric power signal and a resonance capacitor arranged in series with the transmission coil, and configured to have a second frequency as a resonance frequency that is equal to or higher than the first frequency,
- wherein the control unit is configured to be capable of adjusting the length of a dead time during which the plurality of switches are all turned off at the same time.
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;
- and
- a wireless power receiving apparatus configured to receive the electric power signal transmitted from the wireless power supply apparatus, wherein
- the wireless power supply apparatus comprises:
- a bridge circuit comprising a plurality of switches;
- a control unit configured to perform, at a first frequency configured as a transmission frequency, switching control of the plurality of switches included in the bridge circuit;
- and
- a resonance antenna connected to the bridge circuit, comprising a transmission coil configured to transmit an electric power signal and a resonance capacitor arranged in series with the transmission coil, and configured to have a second frequency as a resonance frequency that is equal to or higher than the first frequency,
- wherein the control unit is configured to be capable of adjusting the length of a dead time during which the plurality of switches are all turned off at the same time.
Dependencies are inferred from the claim text.