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Harmonic control and regulation system for harmonic neutralized frequency changer

  • US 7,388,766 B2
  • Filed: 08/26/2004
  • Issued: 06/17/2008
  • Est. Priority Date: 08/26/2004
  • Status: Active Grant
First Claim
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1. An inverter controller subsystem for a harmonic neutralization frequency changer system;

  • comprising;

    a frequency changer;

    a high bandwidth inverter;

    an inverter controller adapted to calculate harmonics at the frequency changer and control the high bandwidth inverter to generate harmonic cancellation signals, wherein said inverter controller samples the frequency changer signals in a stationary reference plane, converts the sampled signals into a rotating reference frame, generates harmonic neutralization signals, and then converts the harmonic neutralization signals back into the stationary reference plane; and

    an injection transformer for injecting said calculated harmonic neutralization signals into said frequency changer system.

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