Power receiving device and power transfer system

  • US 7,919,886 B2
  • Filed: 08/29/2008
  • Issued: 04/05/2011
  • Est. Priority Date: 08/31/2007
  • Status: Active Grant
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First Claim
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1. A power receiving device capable of receiving a carrier wave transmitted from a power transmitting device without contact and obtaining electric power from the received carrier wave, comprising:

  • a carrier receiving section at least including a communication antenna having predetermined inductance and not equipped with an intermediate tap, to receive the carrier wave and generate an induced voltage corresponding to the carrier wave;

    a processing section to generate a drive voltage based on the induced voltage and perform data processing using the generated drive voltage; and

    an impedance converting section to convert impedance between the carrier receiving section and the processing section, whereinthe impedance converting section includes a first capacitor and a second capacitor each having predetermined capacitance and connected in series with each other,the communication antenna, the first capacitor and the second capacitor constitute a resonance circuit, andthe impedance converting section divides an induced voltage generated in the resonance circuit.

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