一种新颖的用于六相感应电机调速系统的空间矢量PWM方法

A novel space vector PWM method for six-phase induction machines

基于三相调速系统中传统的空间矢量理论和统一电压调制技术,本文提出了一种新颖的用于六相感应电机调速系统的空间矢量SVPWM方法。该方法有效地抑制了电压源逆变器供电的六相感应电机中定子谐波电流,提高了直流母线电压利用率,且易于实现,执行速度快,极易推广到以三相组为子集的多相感应电机调速系统PWM控制中。本文给出了这种SVPWM方法具体的实现思路,通过数字仿真和实验结果将它与传统的SPWM和SVPWM方法做了深入的分析和比较研究,研究结果验证了该算法的有效性,它具有谐波电流最小和实现简单的突出优点,在多相PWM逆变器控制中有广阔的应用前景。

Based on the classical space vector theory and unified voltage modulation technique of three- phase drives, a novel space vector PWM scheme of six- phase induction machine drives is described in this paper. This modulation strategy not only effectively suppresses the large stator harmonic current in a six- phase induction machine fed by voltage source inverter and improves utilization of the DC- bus voltage, but also is realized easily and implemented quickly. In addition, the method developed in this paper be easily generalized the control of an induction machine with an arbitrary number of three- phase winding sets. As well as giving a detailed explanation of the presented algorithm, the paper performs a complete analysis and a comparative study between the proposed strategy and the conventional method such as the SVPWM and sinusoidal PWM for six- phase induction machine drives. Finally, simulation results and experimental tests have been carried out to validate the proposed strategy which gives satisfactory results in terms of current harmonic minimization and low implement complexity. In particular, it has great practical prospect on the implement of multiphase PWM schemes.