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Power controller having active voltage balancing of a power supply

  • US 9,444,320 B1
  • Filed: 03/14/2013
  • Issued: 09/13/2016
  • Est. Priority Date: 04/16/2012
  • Status: Active Grant
First Claim
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1. A single-phase power controller comprising:

  • a multi-level converter having a plurality of input terminals configured to connect to a power supply and receive a plurality of sets of voltages, the multi-level converter configured to supply single-phase power to a load from a plurality of converter output terminals;

    an observer module operably coupled to the multi-level converter to selectively control multi-level converter common-mode voltage with respect to the plurality of power supply output terminals; and

    a common mode control loop circuit configured to provide a common mode command signal, wherein the observer module is configured to selectively control use of the common mode command signal to control the multi-level converter common mode voltage on the converter output terminals based on the voltage across the multi-level converter output terminals.

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