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Resonant converters with variable inductor

  • US 9,979,273 B2
  • Filed: 05/19/2016
  • Issued: 05/22/2018
  • Est. Priority Date: 05/19/2016
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a bidirectional resonant converter comprising an input/output terminal, a switching device coupled with the input/output terminal, a resonant circuit coupled with the switching device and including a variable inductor, an output/input terminal coupled with the resonant circuit, and a DC biasing circuit operatively coupled with the variable inductor;

    wherein the variable inductor comprises a toroidal core, a first winding wound around the toroidal core and coupled with the switching device and the output/input terminal, a second core structured to overlap a portion of the toroidal core, and a second winding wound around the second core and coupled with the DC biasing circuit; and

    wherein the DC biasing circuit is controllable to vary an inductance of the variable inductor by saturating the portion of the toroidal core with magnetic flux.

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