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Multi-level active filter

  • US 20070109823A1
  • Filed: 05/16/2006
  • Published: 05/17/2007
  • Est. Priority Date: 05/17/2005
  • Status: Active Grant
First Claim
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1. A multi-phase active filter, comprising:

  • a plurality of phases, each phase comprising a plurality of power cells electrically connected in series;

    wherein each phase has a first end and a second end, the first ends of each phase are electrically coupled to each other, and the second ends of each phase are positioned to be electrically connected between a power source and a load at a point of common coupling;

    wherein each power cell comprises an inverter having a pair of direct current (DC) terminals and an energy dissipating circuit that is electrically connected across the DC terminals of the inverter.

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