用于抑制矩阵变换器共模电压的零输出换相策略

该文对矩阵变换器的共模电压进行了分析，提出了抑制共模电压的零输出换相策略，该策略采用一个正电压、一个零电压和一个负电压实现了对矩阵变换器的控制。其输出三相线电压局部平均值为对称正弦量；电压增益可以达到了理论上的最大值；共模电压的最大瞬时值为输入相电压幅值的一半。该文对零输出换相策略、电压增益及开关动作顺序进行了详细的分析，并与双电压合成控制策略下共模电压的最大瞬时值进行了对比。最后，通过仿真验证了结论的正确性。

HE 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 local ly 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.