中文摘要：

针对双Y移30°绕组结构的六相感应电动机中存在的主要脉动转矩，基于特定谐波（SHE）的PWM技术，提出了一种新的脉动转矩谐波抑制方法。首先，对双Y移30°绕组与更高级的4Y移15°绕组的矢量谐波进行比较；然后，将所得差矢量的谐波进行等效变换；最后，获得控制开关的PWM波形。仿真结果表明：该方法能有选择地降低11、13次谐波电流，从而在尽可能低的开关频率下，对12倍基频的脉动转矩进行有效的抑制。

英文摘要：

Aimed at the primary pulsing torques that exist in six-phase induction motors, a scheme for reducing these pulsing torques is proposed based on special harmonics elimination （SHE） PWM. Firstly, the difference of space vector voltage is to be derived by comparing a dual three-phase system and a fourfold three-phase system. Then, the difference of space vector voltage containing undesired harmonics is to be converted into a PWM waveform. Finally, the converted PWM waveform is to be removed from a square waveform to obtain the PWM waveform for control. The numerical simulation shows that the proposed SHEPWM is valid for reducing the main pulsing torque at a frequency 12 times that of the fundamental component.