A Modulation Method with Low Distortion for Isolated Three-phase AC-DC Matrix Converters

This paper proposes a carrier-based symmetric eight-segment pulse width modulation (8SPWM) for the isolated three-phase AC-DC matrix converter to improve the quality of the three-phase input current. Moreover, it proposes a multi-step hybrid commutation strategy with improved transient response to avoid the short-circuit at the input terminal and the open-circuit at the output terminal caused by the bidirectional switch during commutation. The experimental results validate the effectiveness of the proposed modulation method and commutation strategy.