A DSVM Method for Matrix Converters to Suppress Common-mode Voltage With Reduced Switching Losses

Abstract

This paper proposes a direct space-vector modulation (DSVM) method that can reduce the common-mode voltage (CMV) as well as the switching losses for matrix converters in a high voltage transfer ratio. Even though the previous DSVM improvements can reduce the CMV peak value to 42%, compared to the conventional DSVM method, they incur high switching losses. The DSVM method proposed in this paper provides the same CMV peak value as previous methods with lower switching losses. The switching losses are theoretically analyzed through the accumulated switched voltage in a switching period and compared to those of previous methods. Simulation and experimental results are given to verify the input/output waveforms, CMV reduction, and lower switching losses of the proposed DSVM method.