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

  • US 8,664,803 B2
  • Filed: 10/14/2011
  • Issued: 03/04/2014
  • Est. Priority Date: 12/28/2010
  • Status: Active Grant
First Claim
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1. A wireless power receiver which acquires power by a non-contact method from a wireless power feeder,the wireless power receiver comprising:

  • a power receive resonance circuit which includes a power receive coil and a power receive capacitor and acquires power from a power feed coil of the wireless power feeder by means of the power receive coil on the basis of a magnetic field resonance effect between the power feed coil and the power receive coil;

    a power receive load coil which receives the power fed from the power receive coil by a non-contact method, the power receive load coil being wound around and adjacent to the power receive coil so that at least a part of the power receive coil is positioned inside the power receive load coil; and

    an impedance converter which is arranged between the power receive load coil and a load and in which a primary impedance, connected to the power receive load coil is higher than a secondary impedance connected to the load.

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