双级矩阵变换器驱动异步电动机的特性分析

Performance analysis of two-stage matrix converter driven asynchronous motor

分析了双级矩阵变换器的拓朴结构特点;推导出双级矩阵变换器整流级的脉宽调制算法和逆变级的空间矢量调制策略,并阐述了零电流换流的原理。在MATLAB/SIMULINK平台上建立了双级矩阵变换器的仿真模型,并针对其驱动异步电动机起动、运行的开环系统进行仿真。仿真结果验证了所提出的控制策略的可行性和正确性,表明双级矩阵变换器输入电压和电流为正弦脉冲,且基本同相位;输出线电压为正弦脉冲宽度调制且基波分量为绝对主要成分,具有优良的输入和输出特性。

The features of the two-stage matrix converter topology were analysed, and then the pulse-width modulation strategy for the rectifier side and the space vector pulse width modulation strategy for the inverter side were deduced. And the principle of zero current commutation was elaborated. The simulating model of the two-stage matrix converter was set up under MATLAB/SIMULINK. In order to investigate the starting-up and running process in AC frequency conversion for asynchronous motor, a lot of simulation researches were carried out. Simulation results demonstrate that the input current is sinusoidal input and in phase with the input voltage and the major component of output voltage is the fundamental component, which verify the correctness and availability of the proposed strategies and excellent performance of the two-stage matrix converter.