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Non-contact power transfer apparatus

  • US 20100123430A1
  • Filed: 11/02/2009
  • Published: 05/20/2010
  • Est. Priority Date: 11/14/2008
  • Status: Active Grant
First Claim
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1. A non-contact power transfer apparatus comprising:

  • a main body of a power transmission unit having a power transmission coil;

    a power reception unit having a power reception coil; and

    a support base formed at a part of the main body for mounting the power reception unit detachably, the non-contact power transfer apparatus performing non-contact power transfer from the power transmission coil to the power reception coil using electromagnetic induction, whereinthe power transmission unit includes;

    a resonant capacitor connected in series to the power transmission coil;

    a power transmission circuit for supplying power to the power transmission coil via the resonant capacitor;

    a current detection circuit for detecting a direct current of an input power source of the power transmission circuit;

    unit detection means for detecting a mounting of the power reception unit on the support base; and

    a first microcomputer having a control circuit for controlling the power transmission circuit, the current detection circuit and the unit detection means, andthe power reception unit includes;

    a resonant capacitor connected in parallel with the power reception coil;

    a rectification smoothing circuit for rectifying and smoothing power transferred to the power reception coil;

    a series regulator for converting an output from the rectification smoothing circuit to a predetermined stabilized voltage;

    a charge battery unit having a rechargeable battery;

    a switching element for pulsing an output from the series regulator and pulse-charging the charge battery unit; and

    a second microcomputer having a control circuit for controlling the series regulator and the switching element, andthe second microcomputer and on/off switching of the switching element are used to generate a plurality of pulse patterns.

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