永磁同步电机-矩阵变换器新型电流调制策略研究

为保证矩阵变换器具有良好的输入与输出性能，提出输入电流空间矢量调制与正弦脉宽调制(sinusoidal pulse width modulation，SPWM)电流控制相结合的控制策略，构建交交驱动的永磁同步电机矢量控制系统。把矩阵变换器等效为虚拟的交直交结构，详细分析了输出电流的合成过程，并推导出一个开关周期内矩阵变换器虚拟直流环节的电压与电流表达式，为实现矩阵变换器的虚拟逆变器及虚拟整流器的对应控制策略提供了理论依据。原理样机试验结果表明，采用空间矢量SPWM电流控制的矩阵变换器-永磁同步电机系统不仅达到了良好的矢量控制，而且也提高了输入侧的性能。

Novel Current Modulation Strategy of Permanent Magnet Synchronous Machine and Matrix Converter

This paper presented hybrid current modulation based on space vector modulation and sinusoidal pulse width modulation (SPWM) method in order to attain high input power factor and good output performance. Then the vector control system of matrix converter and permanent magnetic synchronous motor was realized by the hybrid current modulation. The paper introduced the modulation of output currents and derived the virtual DC voltage and current expression in every switching period. The feasibility of the hybrid modulation was proved by these expressions. The prototype was completed, and the simulation and experiment results show that the permanent magnet synchronous motor (PMSM) system of matrix converter (MC) based on the hybrid modulation has good control performance and high input power factor.