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Power converter apparatus and methods using neutral coupling circuits with interleaved operation

  • US 7,800,924 B2
  • Filed: 03/27/2007
  • Issued: 09/21/2010
  • Est. Priority Date: 03/27/2007
  • Status: Active Grant
First Claim
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1. A power converter apparatus comprising:

  • a rectifier having an input coupled to an AC source and an output coupled to a first DC bus and a second DC bus and configured to generate a DC voltage across the first and second DC busses;

    an inverter having an input coupled to the first DC bus and the second DC bus and configured to generate an AC output with respect to a neutral terminal at a phase output terminal;

    parallel first and second neutral coupling circuits, each configured to selectively couple the first DC bus and the second DC bus to the neutral terminal; and

    a control circuit configured to cause interleaved operation of the neutral coupling circuits while the rectifier is generating the DC voltage across the first and second DC busses.

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