Wireless power feeder and wireless power transmission system
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United States of America Patent
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Jun 16, 2015
Grant Date -
Oct 18, 2012
app pub date -
Dec 28, 2010
filing date -
Dec 14, 2010
priority date (Note) -
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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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