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CONTACTLESS POWER-FEED EQUIPMENT

  • US 20130002037A1
  • Filed: 06/26/2012
  • Published: 01/03/2013
  • Est. Priority Date: 06/29/2011
  • Status: Active Grant
First Claim
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1. Contactless power-feed equipment provided with a main induction line and a sub induction line that supply power to a pickup coil in a contactless manner by induction coupling, the contactless power-feed equipment being capable of switching supply and interruption of electric power from the main induction line to the sub induction line,the contactless power-feed equipment comprising:

  • a power-supply device that outputs an AC constant current having a predetermined oscillation frequency to the main induction line;

    a primary coil connected to the main induction line;

    a secondary coil that forms an insulating transformer with the primary coil and is connected to the sub induction line;

    a resonance capacitor that is connected to the secondary coil and constitutes a parallel resonant circuit with the sub induction line; and

    a switch that is provided between the secondary coil and the parallel resonant circuit to switch supply and interruption of electric power to the sub induction line,wherein circuit constants of an inductance of the sub induction line and of a capacitance of the resonance capacitor are selected such that the parallel resonant circuit has a resonance frequency equal to the oscillation frequency of the power-supply device.

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