Zero-output commutation strategy for reducing common-mode voltage of matrix converter

A common-mode voltage of matrix converter is analyzed in the paper. The zero-output commutation strategy of reducing common-mode voltage is presented. Which uses a positive voltage, a negative voltage and a zero-voltage to realize the control for matrix converter. The locally averaged value of output line voltage in duty time is sinusoidal; the voltage gain reaches the maximal value theoretically; the maximal instantaneous value of common-mode voltage based on the zero-output commutation strategy is the half of the magnitude of the input phase-voltage and is compared with the maximal instantaneous value of common-mode voltage under the control strategy of two line voltage. The paper analyzes in detail the synthetical method, the voltage gain and the switch action sequence of matrix converter based on the zero-output commutation strategy. Finally, the validity of the conclusions is demonstrated by simulation.