Wireless power transmission system
First Claim
1. A wireless power transmission system for power transmission from a power feeding device to a power receiving device by wireless, whereinthe power feeding device comprisesa first transceiver that transmits and receives information to select a switching pattern from a plurality of switching patterns each containing at least a plurality of resonance frequencies and a power feeding time length of each resonance frequency, by negotiation with the power receiving device,an oscillator that generates a high frequency signal by oscillating according to an oscillation frequency determined by switching respective resonance frequencies contained in the selected switching pattern,a first resonant circuit that generates an electromagnetic wave from the high frequency signal following a resonance parameter generated based on the resonance frequencies contained in the selected switching pattern, andthe power receiving device comprisesa second transceiver that transmits and receives information regarding the switching pattern, by negotiation with the power feeding device,a second resonant circuit that generates power from the electromagnetic wave following the resonance parameter generated based on the resonance frequencies contained in the selected switching pattern,a switch to open and close a connection between a load circuit to be connected and the second resonant circuit,the switch being controlled to connect between the resonant circuit and the load circuit upon receiving the switching pattern,wherein the power feeding device transmits power to the power receiving device by switching the resonance parameter and the high frequency signal to be supplied to the first resonant circuit, based on the resonance frequencies contained in the switching pattern.
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Accused Products
Abstract
A power feeding device includes an oscillator to generate a high frequency signal, a resonance frequency determining unit configured to determine a resonance frequency to be used for a wireless power transmission, a resonance frequency controller configured to generate a resonance parameter, a resonant circuit to generate electromagnetic inductance, and a communicating unit configured to notify a resonance frequency to the power receiving device before starting a wireless power transmission. A power receiving device includes a communicating unit configured to receive information of a resonance frequency to be used for a wireless power transmission, a resonance frequency controller configured to generate a resonance parameter, a resonant circuit to generate power, a load circuit to operate by the power, a switch to open and close a connection between the resonant circuit and the load circuit, and a determining unit configured to control the switch.
19 Citations
11 Claims
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1. A wireless power transmission system for power transmission from a power feeding device to a power receiving device by wireless, wherein
the power feeding device comprises a first transceiver that transmits and receives information to select a switching pattern from a plurality of switching patterns each containing at least a plurality of resonance frequencies and a power feeding time length of each resonance frequency, by negotiation with the power receiving device, an oscillator that generates a high frequency signal by oscillating according to an oscillation frequency determined by switching respective resonance frequencies contained in the selected switching pattern, a first resonant circuit that generates an electromagnetic wave from the high frequency signal following a resonance parameter generated based on the resonance frequencies contained in the selected switching pattern, and the power receiving device comprises a second transceiver that transmits and receives information regarding the switching pattern, by negotiation with the power feeding device, a second resonant circuit that generates power from the electromagnetic wave following the resonance parameter generated based on the resonance frequencies contained in the selected switching pattern, a switch to open and close a connection between a load circuit to be connected and the second resonant circuit, the switch being controlled to connect between the resonant circuit and the load circuit upon receiving the switching pattern, wherein the power feeding device transmits power to the power receiving device by switching the resonance parameter and the high frequency signal to be supplied to the first resonant circuit, based on the resonance frequencies contained in the switching pattern.
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3. A power feeding device that transmits power to a power receiving device by wireless, the power feeding device comprising:
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a transceiver that transmits and receives information to select a switching pattern from a plurality of switching patterns each containing at least a plurality of resonance frequencies and a power feeding time length of each resonance frequency, by negotiation with the power receiving device; an oscillator that generates a high frequency signal by oscillating according to an oscillation frequency determined by switching respective resonance frequencies contained in the selected switching pattern; and a resonant circuit that generates an electromagnetic wave from the high frequency signal following a resonance parameter generated based on the resonance frequencies contained in the selected switching pattern; wherein the power feeding device transmits power to the power receiving device by switching the resonance parameter and the high frequency signal to be supplied to the resonant circuit, based on the resonance frequencies contained in the switching pattern. - View Dependent Claims (4, 5, 6, 7)
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8. A power receiving device that receives power from a power feeding device by wireless, the power receiving device comprising:
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a transceiver that transmits and receives information to select a switching pattern containing at least a plurality of resonance frequencies and a power feeding time length of each resonance frequency, by negotiation with the power feeding device; a resonant circuit that generates power from an electromagnetic wave following a resonance parameter generated based on the resonance frequencies contained in the selected switching pattern; and a switch to open and close a connection between a load circuit to be connected and the resonant circuit, wherein the switch is controlled to connect between the resonant circuit and the load circuit upon receiving the switching pattern. - View Dependent Claims (9, 10, 11)
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Specification