线电压脉宽调制逆变器供电异步电机性能仿真

Performance Simulation of Line Voltage PWM Inverter Fed Induction Motor

介绍了一种线电压脉宽调制技术(LVPWM),分析了其调制原理。与传统的SPWM技术不同,这种新型的脉宽调制技术是以线电压为参考波形的。讨论了采用LVPWM方法三相桥式电压型逆变器的电压输出能力。建立了仿真模型对LVPWM进行了仿真研究。研究表明,从线电压出发控制逆变器是可行的。仿真结果证明了这种脉宽调制方法的有效性。

This paper describes a new line voltage pulse width modulation （LVPWM） principle and analyzes the modulation theory. This new method is different from the conventional SPWM. It looks on three line-to-line voltages as the reference waveforms. Output capacity of the three-phase bridge voltage source inverter is discussed. The simulation model is constructed. The simulation of LVPWM is presented. Research results demonstrate that it is feasible to control the inverter basing on line-to-line voltage. The simulation results show this method is effective.