车用爪极发电机转子极爪倒角对电磁振动的影响研究  

Influence of Rotor Claw Chamfer on Electromagnetic Vibration of Automotive Claw Pole Alternator

作　　者：吴双龙 左曙光[1] 钟鸿敏 张耀丹[1] 孙罕 

机构地区：[1]同济大学新能源汽车工程中心,上海201804 [2]上海法雷奥汽车电器系统有限公司,上海201201

出　　处：《电工技术学报》2018年第1期48-54,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51375343);国家重大科学仪器开发专项(2012YQ150256)资助项目

摘　　要：探讨了车用爪极发电机转子极爪倒角对其发电性能及电磁振动的影响。首先建立了爪极发电机电磁场分析的三维有限元模型,并通过反电动势试验进行验证;接着通过对电磁力进行二维傅里叶分解,识别了引起爪极发电机产生电磁振动的主要电磁力谐波,并研究了转子极爪倒角对这些主要电磁力谐波以及发电机输出电流的影响;最后建立起爪极发电机电磁振动预测的多物理场仿真模型,并分析了转子极爪倒角对电磁振动的影响。结果表明:爪极发电机转子极爪倒角几乎不会降低发电机的输出性能,却能大幅削弱主要电磁力谐波的幅值从而降低电磁振动,因此,转子极爪后沿倒角比前沿倒角的减振效果更好。This paper describes the influence of rotor claw chamfer on power generation capacity and electromagnetic vibration of automotive claw pole alternator. Firstly, 3D finite element model （FEM） of claw pole alternator was established and its accuracy was validated by back-electromotive force （back-EMF） test. Then, the magnetic force harmonics which mainly cause the electromagnetic vibration of claw pole alternator was identified with the help of 2D Fourier transform of magnetic force. What’s more, the influence of rotor claw chamfer on power generation capacity and magnetic force harmonics was analyzed. Finally, a multiphysics simulation model for predicting the electromagnetic vibration of claw pole alternator was established and the influence of rotor claw chamfer on electromagnetic vibration was analyzed. Results show that rotor claw chamfer would almost not decrease the power generation capacity but can greatly reduce the amplitude of magnetic force harmonics and the electromagnetic vibration of claw pole alternator. Rear chamfer is better than front chamfer on vibration reduction.

关 键 词：爪极发电机 电磁振动 转子极爪倒角 电磁力 空间阶次 

分 类 号：TM341[电气工程—电机]