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Wireless power feeder, wireless power receiver, and wireless power transmission system, and coil

  • US 8,922,064 B2
  • Filed: 08/15/2011
  • Issued: 12/30/2014
  • Est. Priority Date: 03/01/2011
  • Status: Active Grant
First Claim
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1. A wireless power feeder that wirelessly feeds power from a feeding coil to a receiving coil using a magnetic field resonance phenomenon between the feeding coil and receiving coil, said feeder comprising:

  • the feeding coil constructed in a rotatable manner; and

    a power transmission control circuit that supplies AC power to the feeding coil so as to make the feeding coil feed the AC power to the receiving coil,the feeding coil being constructed such that magnetic characteristics thereof in a circumferential direction are made non-uniform.

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