Inverter control apparatus

  • US 6,687,139 B2
  • Filed: 05/24/2001
  • Issued: 02/03/2004
  • Est. Priority Date: 11/29/1999
  • Status: Expired due to Fees
First Claim
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1. An inverter control apparatus comprising:

  • a converting unit which converts a commercial AC voltage into a DC voltage;

    an inverting unit which converts the DC voltage into an output AC voltage of a predetermined frequency by a pulse-width modulation system based on an assigned pulse width, and supplies the output AC voltage to an AC load;

    an instantaneous DC voltage detecting unit which detects an instantaneous value of the DC voltage; and

    a correcting unit which corrects the pulse width so as to maintain the output AC voltage at a desired value following a variation in a result of a detection by the instantaneous DC voltage detecting unit, wherein the correcting unit corrects the pulse width based on a result of multiplying a ratio of a preset reference voltage associated with the desired value of the output AC voltage to a detection result of the instantaneous DC voltage detecting unit, and a target voltage as a target value of the output AC voltage.

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