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WIRELESS POWER FEEDER, WIRELESS POWER TRANSMISSION SYSTEM, AND TABLE AND TABLE LAMP USING THE SAME

  • US 20110260548A1
  • Filed: 04/28/2011
  • Published: 10/27/2011
  • Est. Priority Date: 10/30/2009
  • Status: Active Grant
First Claim
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1. A wireless power feeder for feeding power from a feeding coil to a receiving coil by wireless using a magnetic field resonance phenomenon between the feeding coil and receiving coil, comprising:

  • the feeding coil;

    a power transmission control circuit that feeds AC power to the feeding coil;

    a phase detection circuit that detects a phase difference between the voltage phase and current phase of the AC power, whereinthe power transmission control circuit adjusts the drive frequency of the AC power such that the phase difference is reduced, andin the phase difference detection circuit, a detected phase value of both or one of the voltage and current phases can be changed intentionally.

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