RECTIFIER DEVICE AND METHOD FOR CONTROLLING SAME

摘要

A rectifier device according to the present disclosure controls a ratio of a short-circuit and an opening of a semiconductor switch based upon a difference between command information, which is a total of a harmonic current waveform with a fixed value within a limit of a harmonic regulation and a sinusoidal current waveform that is variable according to a DC load connected to the rectifier device, and actual current information. The harmonic current waveform is a sum of sine function groups of odd orders, wherein an amplitude of each odd-order harmonic is set to be substantially equal to an allowable value under the harmonic regulation, and each odd-order harmonic becomes a zero phase when a fundamental wave expressed by a sine function becomes a zero phase. When the variable sinusoidal current value is smaller than a predetermined value, the harmonic current waveform is attenuated in conjunction.