定子永磁型高速电机凸极转子强度分析  

Strength analysis of salient pole rotor of high-speed motor with permanent magnet stator

作　　者：陈亮亮 祝长生[3] 陈波 周结华[2] 李志农[1] CHEN Liangliang;ZHU Changsheng;CHEN Bo;ZHOU Jiehua;LI Zhinong(Key Laboratory of Nondestructive Testing,Ministry of Education,Nanchang Hangkong University,Nanchang 330063,China;College of Information Engineering,Nanchang Hangkong University,Nanchang 330063,China;College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;State Grid Jiangxi Electric Power Research Institute,Nanchang 330096,China)

机构地区：[1]南昌航空大学无损检测技术教育部重点实验室,南昌330063 [2]南昌航空大学信息工程学院,南昌330063 [3]浙江大学电气工程学院,杭州310027 [4]国网江西省电力有限公司电力科学研究院,南昌330096

出　　处：《振动与冲击》2021年第7期222-230,共9页Journal of Vibration and Shock

基　　金：国家重点研发计划(2018YFB0905500);国家自然科学基金(11632015,51675258);南昌航空大学博士科研启动金(EA201804206)。

摘　　要：定子永磁型电机具有转子上既无永磁体也无绕组、功率密度高、效率高等优点,因此非常适合在高速下工作。然而由于凸极转子复杂的几何形状,对其强度进行分析只能采用有限元法等数值方法。基于弹性力学理论,建立了凸极转子强度的解析分析模型。分析了凸极转子的载荷分布,在此基础上,基于平面应力模型和应力函数法,推导了定子永磁型电机凸极转子的应力及变形的解析解;用有限元法对解析解的有效性进行了验证;分析了凸极转子的凸极高度及形状对转子强度的影响。结果表明,建立的凸极转子强度解析解在转子应力最大区域内的计算结果与有限元法的计算结果完全吻合,能够对定子永磁型高速电机凸极转子的最大应力进行精确分析,可为定子永磁型高速电机的转子设计提供支持。Stator permanent magnet motor is very suitable for high speed operation due to its advantages of no permanent magnets and windings in rotor,high power density,and high efficiency.However,because of complex geometric configuration of its salient pole rotor,the rotor strength analysis in high speed operation can only be done using numerical methods,such as,the finite element method(FEM).Here,based on the elasticity theory,the analytical analysis model of salient pole rotor strength was established.Firstly,the load distribution of the salient pole rotor was analyzed.Then,based on the plane stress model and the stress function method,analytical solutions to stress and deformation of the salient pole rotor of the stator permanent magnet motor were derived,and the effectiveness of analytical solutions was verified using FEM.Finally,effects of salient pole height and shape on rotor strength were analyzed.The results showed that the calculation results of strength analytical solutions to the salient pole rotor established here agree well with those obtained using FEM in the maximum stress region of the rotor to accurately analyze the maximum stress of the salient pole rotor of the motor;the study results can provide a support for rotor design of stator permanent magnet high-speed motors.

关 键 词：定子永磁电机 凸极转子 转子强度 解析解 高速电机 

分 类 号：TH133[机械工程—机械制造及自动化]