Strength analysis of salient pole rotor of high-speed motor with permanent magnet stator
CHEN Liangliang1,2, ZHU Changsheng3, CHEN Bo4, ZHOU Jiehua2, LI Zhinong1
1. Key Laboratory of Nondestructive Testing, Ministry of Education, Nanchang Hangkong University, Nanchang 330063, China;
2. College of Information Engineering, Nanchang Hangkong University, Nanchang 330063, China;
3. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China；
4. State Grid Jiangxi Electric Power Research Institute, Nanchang 330096, China
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.
陈亮亮1,2，祝长生3,陈波4，周结华2，李志农1. 定子永磁型高速电机凸极转子强度分析[J]. 振动与冲击, 2021, 40(7): 222-230.
CHEN Liangliang1,2, ZHU Changsheng3, CHEN Bo4, ZHOU Jiehua2, LI Zhinong1. Strength analysis of salient pole rotor of high-speed motor with permanent magnet stator. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(7): 222-230.
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