定子永磁型高速电机凸极转子强度分析

陈亮亮1,2,祝长生3,陈波4,周结华2,李志农1

振动与冲击 ›› 2021, Vol. 40 ›› Issue (7) : 222-230.

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (7) : 222-230.
论文

定子永磁型高速电机凸极转子强度分析

  • 陈亮亮1,2,祝长生3,陈波4,周结华2,李志农1
作者信息 +

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
Author information +
文章历史 +

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。

Abstract

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

Key words

stator permanent magnet motor / salient pole rotor / rotor strength / analytical solution / high speed motor

引用本文

导出引用
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[J]. Journal of Vibration and Shock, 2021, 40(7): 222-230

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