基于SHEPWM的六相感应电动机谐波抑制  

A novel SHEPWM scheme of harmonic reduction for six-phase induction motors

作　　者：王铁军[1] 孟凡友[1] 方芳[1] 

机构地区：[1]海军工程大学电气工程学院,武汉430033

出　　处：《海军工程大学学报》2014年第2期1-4,14,共5页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(51177171)

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。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.

关 键 词：多相感应电机 脉动转矩 谐波消除 SHEPWM 

分 类 号：TM346[电气工程—电机]