WIRELESS POWER SUPPLY DEVICE
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United States of America Patent
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Issued Date -
Feb 26, 2015
app pub date -
Feb 4, 2013
filing date -
Feb 17, 2012
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Abstract
Wirelessly supplying power is rapidly changed by a switching circuit 11 selectively exciting a magnetic field coupling resonance circuit of L1 and C1 for wireless power supply by use of a resonant frequency of the resonance circuit and its ⅓-divided frequency. A large power is supplied in the case of excitation at the resonant frequency, and in the case of excitation at the ⅓-divided frequency, a small power is supplied. A wireless power supply device with a high power conversion efficiency, with less unwanted radiation, and capable of rapidly changing supplying power can thereby be provided.
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