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Push-pull inverter with snubber energy recovery

  • US 7,180,759 B2
  • Filed: 11/03/2004
  • Issued: 02/20/2007
  • Est. Priority Date: 11/03/2004
  • Status: Active Grant
First Claim
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1. A power inverter comprising:

  • a DC-to-AC converter circuit including a transformer having a primary winding coupled to a DC bus and a secondary winding coupled to an AC bus, said primary winding having a first switch and first free-wheeling diode coupled to a first end, and a second switch and second free-wheeling diode coupled to a second end;

    a snubber circuit coupled to each end of the primary winding, and configured to limit voltage transients on the primary winding; and

    a third switch coupling the first end of the primary winding to the snubber circuit, thereby forming a first DC-to-DC converter from the third switch, the primary winding, and the first free-wheeling diode, said first DC-to-DC converter operative to control energy transfer between the snubber circuit and the DC-to-AC converter circuit.

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