三相交流电动机不对称供电工况下磁动势的变化规律  

Variation law of magnetic motive force of the three-phase AC motor under the condition of asymmetric power supply

作　　者：董锋斌[1] 皇金锋[1] DONG Feng-bin;HUANG Jin-feng(School of Electrical Engineering,Shaanxi University of Technology,Hanzhong 723000,China)

机构地区：[1]陕西理工大学电气工程学院,陕西汉中723000

出　　处：《陕西理工大学学报（自然科学版）》2020年第4期25-29,共5页Journal of Shaanxi University of Technology:Natural Science Edition

基　　金：陕西省教育厅重点实验室科研计划项目(18JS021);陕西省高等教育教学改革研究项目(17BY087)。

摘　　要：针对三相交流电动机对称绕组不对称供电的实际工况,讨论了电机中磁动势的特点,利用正弦定理证明了三相交流电机磁动势的空间运动轨迹为椭圆形旋转磁动势,利用余弦定理推导了磁动势角速度的变化特点,进而分析了磁动势角加速度的变化趋势,得到了不同区间磁动势的变化规律。In view of the fact that the symmetrical windings of the three-phase AC motor are powered asymmetrically,the characteristics of the magnetic motive force in the motor are discussed.And it is proved that the space motion trajectory of the magnetic motive force of the three-phase AC motor is the elliptic rotating magnetic motive force by using sine theorem.The change characteristics of angular velocity of magnetic motive force are deduced by using cosine theorem,and then the change trend of angular acceleration of magnetic motive force is analyzed,and the change rules of magnetic motive force in different regions are obtained.

关 键 词：三相交流电动机 不对称供电 磁动势 变化规律 

分 类 号：TM34[电气工程—电机]