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Hybrid resonant bridgeless AC-DC power factor correction converter

  • US 9,490,694 B2
  • Filed: 03/04/2015
  • Issued: 11/08/2016
  • Est. Priority Date: 03/14/2014
  • Status: Active Grant
First Claim
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1. An AC-DC converter comprising:

  • a first AC voltage source input node connectable to a first AC input line;

    a second AC voltage source input node connectable to a second AC input line;

    an input inductor electrically coupled between the first AC voltage source input node and a central node;

    a first switch electrically coupled between the central node and a first rail node, the first switch having a body diode oriented to pass current from the first rail node to the central node;

    a second switch electrically coupled between the central node and a second rail node, the second switch having a body diode oriented to pass current from the central node to the second rail node;

    a first input device electrically coupled between the first rail node and the second AC voltage source input node and oriented to pass current from the first rail node to the second AC voltage source input node, the first input device selected from the group consisting of a diode and a switch;

    a second input device electrically coupled between the second rail node and the second AC voltage source input node and oriented to pass current from the second AC voltage source input node to the second rail node, the second input device selected from the group consisting of a diode and a switch;

    an output circuit electrically coupled between the second rail node and the first rail node, the output circuit comprising a resonant circuit electrically connectable to a load; and

    a controller communicatively coupled to provide control signals to operate the first and the second switches at a first switching frequency.

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