感应电动机不对称运转模式  

Modeling of Induction Motors Operated in Asymmetry

作　　者：刘晓东[1] 橐晓宇[1] 陆敏华[1] 

机构地区：[1]上海出入境检验检疫局电器检测实验室

出　　处：《安全与电磁兼容》2005年第2期78-84,共7页Safety & EMC

摘　　要：针对感应电动机不对称工作时发射二次谐波,文章分析了椭圆形旋转磁场的运动规律,解释了现行理论的问题,建立了修正模式,说明不对称合成磁动势由两部分组成:一个呈闭合余弦曲线形状的以电源角速度正向旋转的驱动磁动势和无数个分布在驱动磁动势曲线上的以二倍电源角速度反向旋转的扰动磁动势,扰动磁动势在定子绕组产生二次谐波。For emitting of 2nd harmonic current from an induction motor operated in asymmetry, this paper explains the fault in the popular principle and presents a modified model describing the rotating magnetomotive force (mmf) in the whole magnetic field, which consists of two components: one driving mmf of closed cosine curve rotating forwards at power angular speed, and numerous disturbing mmfs distributed on the curve rotating reversedly at double power angular speed, which induce second harmonic in the stator.

关 键 词：感应电动机 不对称运转模式 二次谐波 旋转磁动势 脉振磁动势 驱动磁动势 扰动磁动势 

分 类 号：TM346[电气工程—电机]