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POWER RECEIVING DEVICE, AND ELECTRONIC APPARATUS AND NON-CONTACT CHARGING SYSTEM USING THE SAME

  • US 20090121677A1
  • Filed: 03/22/2007
  • Published: 05/14/2009
  • Est. Priority Date: 03/24/2006
  • Status: Active Grant
First Claim
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1. A power receiving device, comprising:

  • a power receiving coil having a spiral coil;

    a rectifier rectifying an alternating voltage generated in the power receiving coil;

    a secondary battery to which a direct current voltage rectified in the rectifier is charged; and

    a magnetic foil arranged in at least one of a position between the spiral coil and the secondary battery, and a position between the spiral coil and the rectifier,wherein when a real component of relative permeability of the magnetic foil is μ

    r′ and

    a plate thickness of the magnetic foil is t [μ

    m], the magnetic foil has a value (μ

    r′

    ·

    t) expressed as the product of the real component μ

    r′

    of the relative permeability and the plate thickness t of 30000 or larger.

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