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Multi-phase autotransformer

  • US 10,049,811 B2
  • Filed: 03/20/2015
  • Issued: 08/14/2018
  • Est. Priority Date: 03/20/2015
  • Status: Active Grant
First Claim
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1. A transformer comprising:

  • a core that includes a first leg, a second leg, and a third leg; and

    a plurality of conductor lines in which each conductor line in the plurality of conductor lines comprises at least three windings wound around the core such that a phase voltage at an output connection point associated with a corresponding conductor line of the plurality of conductor lines is a percentage of a line voltage for the corresponding conductor line and such that harmonic currents are reduced, wherein harmonic currents mitigation increases as a number of windings included in the at least three windings increases;

    wherein one winding on one leg includes two sub-windings; and

    wherein each conductor line has a first end and a second end, the second end being tied in common to each other and the first end for receiving one phase of three phases of a power source and wherein the two sub-windings include a tap therebetween as an output of one of the three phases of the transformer.

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