大型异步电机定子端部绕组电磁力的研究  

Research on electromagnetic force in the stator end winding of large induction motor

作　　者：鲍晓华[1] 程晓巍[1] 方勇[1] 吕强[1] 单丽 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009 [2]合肥恒大江海泵业股份有限公司,安徽合肥231131

出　　处：《电机与控制学报》2013年第10期27-32,共6页Electric Machines and Control

基　　金：国家自然科学基金(51377039;51177033);中央高校基本科研业务专项基金(2012HGZY0003)

摘　　要：针对大型异步电机定子端部绕组受电磁力作用容易发生故障的实际工程问题,提出了一种通过改变端部绕组锥度角进而改善定子端部绕组力学性能的方法。利用MAXWELL方程结合分离变量法推导出了端部绕组磁场的表达式,通过时步有限元方法建立端部绕组模型,进而分析绕组端部磁场的分布情况。最后结合洛伦兹法则,利用局部坐标变换得到端部绕组斜线段电磁力的计算公式,运用数值分析方法对其仿真分析,在此基础上结合具体算例,对比分析了端部绕组在不同锥度角下电磁力的分布情况。分析结果表明,该方法能够改善端部绕组的力学性能,延长电机使用寿命,为干式潜水电机定子端部绕组的优化设计提供理论依据。According to the engineering problems produced by electromagnetic force of end winding in large induction motor, a method that changes taper angle of the end winding to improve the mechanical properties was proposed. Firstly, the magnetic field expression in the region of end winding was derived by adopting the separation of variables method based on Maxwell equations, and then the magnetic field distribution of the end winding was analyzed by Finite Element Method. Finally, combined with Lorentz rule and the local coordinated transformation, the electromagnetic force calculation formula of the end winding was derived, and the simulation of electromagnetic force was done by numerical recipes method. In combination with specific examples of large dry submersible motor, different electromagnetic force distributions were derived by changing the taper angle of the stator end-winding. The simulation results show that the method improves the end winding＇s mechanical properties effectively, prolongs the service life of motor and provides fundamental theory for the optimization design of stator end winding.

关 键 词：潜水电机 有限元方法 锥度角 端部绕组磁密 电磁力密度 

分 类 号：TM146[电气工程—电工理论与新技术]