逆变器供电感应电机新型空间矢量PWM控制方法

讨论了电压空间矢量ＰＷＭ控制的几种不同组合方式。分析了每种组合方式下的谐波电流，电机谐波转矩和谐波损耗。给出了比较曲线和实验波形。为不同应用场合下选择不同的空间矢量ＰＷＭ控制方法提供了依据。组合方式３为在逆变器—感应电动机系统中的最优ＰＷＭ控制方式。此方法的优点是器件的开关损耗低，而且在调制系数较高时，电机电流的谐波含量少，由其引起的电机谐波损耗低、转矩脉动小。理论分析和实验结果证实了控制方法的有效性。

Novel space vector PWM method for inverter fed induction motors

Several different pulse width modulation(PWM) assembly versions in voltage space vector PWM control system are represented. Especially, the harmonic current contents generated by the inverter in different PWM assembly versions are discussed, the harmonic torque and losses in the induction motor caused by the harmonic current are studied. The performance comparisons of these assembly versions are made and the experimental results are shown. The paper provides a basis for selecting a proper space vector PWM control version under different applied conditions. The version 3 is the best one while applying space vector PWM control into inverter induction motor control system, it is characterized by not only low switching losses, but also low harmonic contents of motor current at high modulation index which leads to low harmonic losses and reduced torque pulsation. Theoretical analyses and experimental results have proven the effectiveness of the proposed control scheme.