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Resonant power converter with switchable reflected output voltage

  • US 9,831,787 B1
  • Filed: 05/27/2016
  • Issued: 11/28/2017
  • Est. Priority Date: 05/27/2016
  • Status: Active Grant
First Claim
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1. A power converter comprising:

  • a generator configured to generate a sequence of output voltage waveforms;

    a first switching transistor and a second switching transistor connected to the generator and configured to control a duty cycle of the output voltage waveforms;

    an input voltage line connected to the first switching transistor;

    a resonant tank connected to the generator comprising at least one capacitor and at least one inductor;

    a transformer including a primary side connected in series with the at least one inductor, wherein the primary side is configured to use at least one primary winding tap and a secondary side for connecting to a rectifying circuit for providing a rectified DC voltage to an output load circuit; and

    a first switch and a second switch on the primary side connected to the at least one primary winding tap, wherein the at least one primary winding tap is selected by the first switch or the second switch to select a reflected output voltage by closing the first switch or the second switch; and

    a plurality of clamping diodes connected between the first switch and the second switch and the input line and configured to limit voltage across the first switch or the second switch.

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