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Wireless power supply system

  • US 9,283,894 B2
  • Filed: 09/08/2011
  • Issued: 03/15/2016
  • Est. Priority Date: 03/17/2009
  • Status: Active Grant
First Claim
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1. A wireless power supply system comprising:

  • a power sending resonance coil that has an air coil and a capacitor connected serially to the air coil, and transmits power as a first magnetic field wirelessly, the power sending resonance coil having a first resonant frequency within a predetermined range;

    one or more relay resonance coils that resonate at a second resonant frequency within the predetermined range;

    a power receiving resonance coil that resonates at a third resonant frequency within the predetermined range, the power receiving resonance coil being placed in a position where the power receiving resonance coil does not receive power directly from the power sending resonance coil; and

    a posture control apparatus that controls a direction of a coil axis of at least one of the power sending resonance coil, the power receiving resonance coil and the relay resonance coil, the direction of the coil axis being changed by the posture control apparatus,wherein the one or more relay resonance coils relay power from the power sending resonance coil to the power receiving coil using a second magnetic field inducted by the first magnetic field,the second magnetic field inducts a third magnetic field in the power receiving coil, andthe power receiving coil receives power using the third magnetic field.

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