Patent ID: 6687139
Filing Date: 2004-02-03
Classification: B60H,H02M,H02P,Y02T

Abstract:
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.