• US 20100052431A1
  • Filed: 09/01/2009
  • Published: 03/04/2010
  • Est. Priority Date: 09/02/2008
  • Status: Active Grant
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First Claim
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1. An electromagnetic resonance non-contact power transmission device comprising:

  • a transmitter including a transmitter resonance element having a mechanism for discretely or continuously varying a resonant frequency, a transmitter excitation element coupled to the transmitter resonance element by electromagnetic induction, and an alternating current source for applying an alternating current at the same frequency as the resonant frequency to the transmitter excitation element; and

    a plurality of receivers each including a receiver resonance element having a specific resonant frequency, a receiver excitation element coupled to the receiver resonance element by electromagnetic induction, and an output circuit for outputting an electric current induced by the receiver excitation element,wherein electric power is transmitted selectively from the transmitter to any of the plurality of receivers having different specific resonant frequencies by changing the resonant frequency of the transmitter.

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