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AC/DC converter including a bidirectional switch

  • US 10,483,859 B2
  • Filed: 11/08/2016
  • Issued: 11/19/2019
  • Est. Priority Date: 11/12/2015
  • Status: Active Grant
First Claim
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1. An AC/DC converter comprising:

  • a transformer including a primary winding connected to an AC power source and a secondary winding electromagnetically coupled to the primary winding;

    a bidirectional switch connected in series to the primary winding;

    a resonant capacitor connected in parallel or series to the bidirectional switch;

    a capacitor voltage divider circuit arranged to divide a voltage across both ends of the bidirectional switch so as to generate a divided voltage; and

    a control circuit arranged to turn on the bidirectional switch at a timing when the divided voltage becomes zero.

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