PWM Control of Three-Phase to Three-Phase Matrix Converters for Reducing a Number of Commutations

Abstract

This paper presents a control scheme of three-phase to three-phase matrix converters for reducing the number of commutations. The number of commutations during a control period in the proposed control scheme can be reduced to three times from four times in the conventional control scheme. It can be realized by using the output currents in the calculations of the duty factors. As a result, one of the output line voltage waveforms during a control period consists of two voltage levels with same sign of the reference. The switching loss and the output voltage harmonics can be suppressed. The effectiveness of the proposed control algorithm of the matrix converters has been verified by experiments.