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Dual-input 18-pulse autotransformer rectifier unit for an aircraft AC-DC converter

  • US 8,873,263 B2
  • Filed: 04/17/2012
  • Issued: 10/28/2014
  • Est. Priority Date: 04/17/2012
  • Status: Active Grant
First Claim
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1. A passive AC-DC converter comprising:

  • an autotransformer, wherein said autotransformer comprises;

    a plurality of first high voltage AC inputs;

    a plurality of second low voltage AC inputs;

    a winding topology having a plurality of windings corresponding to each of multiple phases, said plurality of windings configured such that said autotransformer generates an 18-pulse AC input current waveform, said winding topology having a plurality of phase legs, each phase leg comprising a first winding segment having a turn ratio of 1, a second winding segment having a turn ratio of 1.690, a third winding segment having a turn ratio of 4.668, a fourth winding having a turn ratio of 3.926, a fifth winding segment having a turn ratio of 3.433, a sixth winding segment having a turn ratio of 3.572, and a seventh winding segment having a turn ratio of 3.177, for a step down ratio of 0.9; and

    a set of autotransformer outputs;

    a bridge rectifier connected to said set of autotransformer outputs; and

    a DC output from said bridge rectifier.

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