WIRELESS POWER SUPPLY APPARATUS
First Claim
1. A wireless power supply apparatus configured to transmit an electric power signal including any one from among an electric field component, a magnetic field component, and an electromagnetic field component, the wireless power supply apparatus comprising:
- a transmission antenna comprising a transmission coil;
a power supply configured to be capable of setting arbitrary frequency components from among multiple frequency components, and to output, to the transmission antenna, a multi-tone signal obtained by superimposing sine wave signals of the respective frequency components thus set; and
a frequency control circuit configured to set the frequency components of the sine wave signals to be output by the power supply,wherein, in a measurement mode, the frequency control circuit determines at least one frequency component at which the electric power transmission efficiency is high in such a state in which the frequency control circuit sets a plurality of frequency components for the power supply,and wherein, in a power supply mode, the frequency control circuit sets, for the power supply, the aforementioned at least one frequency component determined in the measurement mode.
1 Assignment
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Accused Products
Abstract
A resonance circuit includes a transmission coil and a resonance capacitor connected in series. A multi-tone power supply is capable of selecting arbitrary frequency components from among multiple discrete frequency components, and outputs, to the resonance circuit, a multi-tone signal obtained by superimposing sine wave signals of the respective frequency components thus selected. In a measurement mode, a frequency control circuit sets all the frequency components for the multi-tone power supply, and selects at least one frequency component at which the electric power transmission efficiency is high in the state in which a multi-tone signal is generated by superimposing the sine wave signals of all the frequencies. In a power supply mode, the aforementioned at least one frequency component thus selected in the measurement mode is set for the multi-tone power supply.
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Citations
13 Claims
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1. A wireless power supply apparatus configured to transmit an electric power signal including any one from among an electric field component, a magnetic field component, and an electromagnetic field component, the wireless power supply apparatus comprising:
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a transmission antenna comprising a transmission coil; a power supply configured to be capable of setting arbitrary frequency components from among multiple frequency components, and to output, to the transmission antenna, a multi-tone signal obtained by superimposing sine wave signals of the respective frequency components thus set; and a frequency control circuit configured to set the frequency components of the sine wave signals to be output by the power supply, wherein, in a measurement mode, the frequency control circuit determines at least one frequency component at which the electric power transmission efficiency is high in such a state in which the frequency control circuit sets a plurality of frequency components for the power supply, and wherein, in a power supply mode, the frequency control circuit sets, for the power supply, the aforementioned at least one frequency component determined in the measurement mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wireless power supply system comprising:
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a wireless power supply apparatus configured to transmit an electric power signal including any one of an electric field component, a magnetic field component, and an electromagnetic field component; and a wireless power receiving apparatus configured to receive the electric power signal, wherein the wireless power supply apparatus comprises; a transmission antenna comprising a transmission coil; a power supply configured to be capable of setting arbitrary frequency components from among multiple frequency components, and to output, to the transmission antenna, a multi-tone signal obtained by superimposing sine wave signals of the respective frequency components thus set; and a frequency control circuit configured to set the frequency components of the sine wave signals to be output by the power supply, wherein, in a measurement mode, the frequency control circuit sets a plurality of frequency components for the power supply, and determines at least one frequency component at which the electric power transmission efficiency is high in such a state in which a multi-tone signal is generated by superimposing sine wave signals of the plurality of frequency components, and wherein, in a power supply mode, the frequency control circuit sets, for the power supply, the aforementioned at least one frequency component determined in the measurement mode.
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Specification