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Field regulator

  • US 10,304,608 B2
  • Filed: 04/16/2015
  • Issued: 05/28/2019
  • Est. Priority Date: 04/17/2014
  • Status: Active Grant
First Claim
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1. A field regulator for a resonant circuit, the resonant circuit including an inductor coil around a core, the field regulator including:

  • a DC bias circuit configured to apply a DC bias current to the inductor coil for regulating an electromagnetic field generated by the inductor;

    a feedback control system in which a level of the applied DC bias current is determined based on a current measured in the resonant circuit;

    a current detector for detecting a current flow of the resonant circuit; and

    a bias current controller for controlling the DC bias current based on the detected current flow of the resonant circuit.

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