Z源三相三电平矩阵变换器研究

Research on Z-source Stacked Matrix Converter

提出了一种应用于电动汽车电机驱动的Z源三相三电平矩阵变换器(ZS-SMC)拓扑,该拓扑克服了已有电动汽车多电平逆变器的诸多缺陷:成本高、损耗高、谐波大、可靠性低等。分析了ZS-SMC的改进同相载波层叠法的调制策略,并通过在调制波中引入零序分量,提高了直流电压的利用率。给出了基于ZS-SMC的内置式永磁同步电机驱动系统的控制策略。建立了系统仿真模型,仿真结果验证了所提拓扑及其控制策略的正确性和可行性。

A Z-source stacked matrix converter（ZS-SMC）topology for motor drives was proposed. Compared with conventional drive circuits in electric vehicle（EV）,the proposed topology has lower cost,lower power dissipation,smaller total harmonic distortion（THD）,and higher reliability. The operating principle and modulation method of ZSSMC were described. The improved carrier phase disposition PWM modulation was analyzed and the carrier phase disposition PWM modulation with a zero-sequence component was used in the converter in order to increase the DC voltage utilization ratio. Finally,the validity and feasibility of the proposed converter and modulation strategies were verified by simulating drive circuit based on interior permanent magnet synchronous motor（IPMSM）.