POWER FEED DEVICE, POWER RECEIVING DEVICE, AND WIRELESS POWER FEED SYSTEM
First Claim
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1. A power feed device comprising:
- a power generator configured to generate power that should be fed;
a power feed element configured to be formed of a coil fed with power generated by the power generator;
a resonance element configured to be coupled to the power feed element by electromagnetic induction; and
a variable matching unit configured to include a function for impedance matching at a point of feed of the power to the power feed element, whereina diameter of the power feed element is changeable, andthe variable matching unit is capable of changing the diameter of the power feed element.
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Abstract
A power feed device includes: a power generator configured to generate power that should be fed; a power feed element configured to be formed of a coil fed with power generated by the power generator; a resonance element configured to be coupled to the power feed element by electromagnetic induction; and a variable matching unit configured to include a function for impedance matching at a point of feed of the power to the power feed element, wherein a diameter of the power feed element is changeable, and the variable matching unit is capable of changing the diameter of the power feed element.
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Citations
14 Claims
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1. A power feed device comprising:
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a power generator configured to generate power that should be fed; a power feed element configured to be formed of a coil fed with power generated by the power generator; a resonance element configured to be coupled to the power feed element by electromagnetic induction; and a variable matching unit configured to include a function for impedance matching at a point of feed of the power to the power feed element, wherein a diameter of the power feed element is changeable, and the variable matching unit is capable of changing the diameter of the power feed element. - View Dependent Claims (2, 3, 4)
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5. A power receiving device comprising:
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a resonance element configured to receive transmitted power based on a magnetic field resonance relationship; a power feed element configured to be formed of a coil that is coupled to the resonance element by electromagnetic induction and is fed with received power; a resonance element configured to be coupled to the power feed element by electromagnetic induction; and a variable matching unit configured to include a function for impedance matching at a connecting part between the power and a load of the power feed element, wherein a diameter of the power feed element is changeable, and the variable matching unit is capable of changing the diameter of the power feed element. - View Dependent Claims (6, 7, 8)
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9. A wireless power feed system comprising:
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a power feed device; and a power receiving device configured to receive power transmitted from the power feed device based on a magnetic field resonance relationship, wherein the power feed device includes a power generator to generate power that should be fed, a power feed element formed of a coil fed with power generated by the power generator, a resonance element coupled to the power feed element by electromagnetic induction, and a variable matching unit including a function for impedance matching at a point of feed of the power to the power feed element, a diameter of the power feed element is changeable, the variable matching unit is capable of changing the diameter of the power feed element, the power receiving device includes a resonance element that receives power transmitted from the power feed device based on a magnetic field resonance relationship, a power feed element formed of a coil that is coupled to the resonance element by electromagnetic induction and is fed with received power, a resonance element coupled to the power feed element by electromagnetic induction, and a variable matching unit including a function for impedance matching at a connecting part between the power and a load of the power feed element, a diameter of the power feed element is changeable, and the variable matching unit is capable of changing the diameter of the power feed element. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification