WIRELESS POWER FEEDER AND WIRELESS POWER TRANSMISSION SYSTEM
First Claim
Patent Images
1. A wireless power feeder comprising:
- a feeding coil; and
a power transmission control circuit that supplies AC current at a drive frequency to the feeding coil so as to make the feeding coil feed AC power to a receiving coil by wireless based on a magnetic field resonance phenomenon between the feeding coil and receiving coil in a state where the feeding coil substantially does not resonate.
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Abstract
A wireless power feeder 116 feeds power from a feeding coil L2 to a receiving coil L3 by wireless based on a magnetic field resonance phenomenon between the feeding coil L2 and receiving coil L3. A power transmission control circuit 200 supplies AC current at a drive frequency fo to the feeding coil L2. The feeding coil L2 outputs AC power in substantially a non-resonant state with respect to circuit elements on the power feeding side. Then, power is supplied to a receiving coil circuit 130 by a magnetic field resonance between the feeding coil L2 and receiving coil L3.
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Citations
13 Claims
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1. A wireless power feeder comprising:
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a feeding coil; and a power transmission control circuit that supplies AC current at a drive frequency to the feeding coil so as to make the feeding coil feed AC power to a receiving coil by wireless based on a magnetic field resonance phenomenon between the feeding coil and receiving coil in a state where the feeding coil substantially does not resonate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless power feeder comprising:
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a feeding coil; and a power transmission control circuit that supplies AC current at a drive frequency to the feeding coil so as to make the feeding coil feed AC power to a receiving coil by wireless based on a magnetic field resonance phenomenon between the feeding coil and receiving coil, wherein the feeding coil does not form, together with circuit elements on the power feeding side, a resonance circuit having a resonance point corresponding to the resonance frequency of the receiving coil.
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11. A wireless power feeder comprising:
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a feeding coil; and a power transmission control circuit that supplies AC current at a drive frequency to the feeding coil so as to make the feeding coil feed AC power to a receiving coil by wireless based on a magnetic field resonance phenomenon between the feeding coil and receiving coil, wherein no capacitor is connected in series or in parallel to the feeding coil.
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12. A wireless power transmission system comprising:
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a wireless power feeder; and a wireless power receiver, wherein the wireless power feeder comprises; a feeding coil; and a power transmission control circuit that supplies AC current at a drive frequency to the feeding coil so as to make the feeding coil feed AC power to a receiving coil in a state where the feeding coil substantially does not resonate, and the wireless power receiver comprises; the receiving coil; and a loading coil that is magnetically coupled to the receiving coil and receives AC power that the receiving coil has received from the feeding coil. - View Dependent Claims (13)
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Specification