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Inductive power transfer control

  • US 9,369,058 B2
  • Filed: 08/12/2011
  • Issued: 06/14/2016
  • Est. Priority Date: 08/13/2010
  • Status: Active Grant
First Claim
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1. A control method for an inductive power transfer (IPT) pick-up comprising an AC input from a resonant circuit, the AC input being electrically coupled to a diode bridge adapted to rectify an AC current from the AC input and supply a DC current to a DC output, the method comprising:

  • selectively shunting a first diode of the diode bridge to cause the AC current to recirculate to the resonant circuit during a positive period of the AC current; and

    selectively shunting a second diode of the diode bridge to cause the AC current to recirculate to the resonant circuit during a negative period of the AC current;

    wherein shunting of said first and second diodes is synchronised with the AC current whereby a predetermined proportion of said positive and negative periods of the AC current arc rectified to supply the DC current to the DC output, and a remaining proportion of said positive and negative periods of the AC current are recirculated to the resonant circuit.

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