Reduction of subharmonic oscillation at high frequency operation of a power inverter

  • US 7,449,859 B2
  • Filed: 02/20/2007
  • Issued: 11/11/2008
  • Est. Priority Date: 02/20/2007
  • Status: Active Grant
First Claim
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1. A method of controlling an inverter of an electric motor, the method comprising:

  • obtaining stationary frame currents corresponding to an output of the inverter;

    extracting stationary frame subharmonic current components from the stationary frame currents;

    performing stationary frame current regulation on the stationary frame subharmonic current components, resulting in stationary frame subharmonic adjustment voltage commands; and

    adjusting stationary frame fundamental voltage commands with the stationary frame subharmonic adjustment voltage commands.

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