A NOVEL MODULATION METHOD FOR DC/AC MATRIX CONVERTERS UNDER DISTORTED DC SUPPLY VOLTAGE

摘要

The aim of this paper is to investigate the performance of a novel modulation algorithm for DC to AC direct matrix converters, with an alternative PWM strategy. By suitable toggling the matrix switches, this novel modulation provides independent control of the magnitude and frequency of the generated output voltages. This new modulation method for matrix converter based on forming the switches matrix. Using this control method in such a converter, ensures that the switches do not short-circuit the voltage source, and do not open-circuit the current sources, thus we have the continuous currents at output and input terminals. It is shown that, it is possible to operate the converter with undistorted output voltages, even when input voltage is distorted. Also the accordance of the simulation results with the mathematical investigation are pointed out.