大功率实心转子高速永磁电机转子强度失效模式的影响规律研究

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DOI：10.15938/j. emc.2025.08.006

中图分类号：TM355 文献标志码：A 文章编号：1007-449X（2025）08-0056-14

Research on effect of rotor strength failure modes in high-power solid rotor high-speed permanent magnet motors

YANG Zihao， GE Baojun， DONG Chuanyou， TAO Dajun， YANG Zhifei （National and Local Joint Engineering Research Center of Large Electric Machines and Heat Transfer Technology， Harbin University of Science and Technology，Harbin15oo8O，China）

Abstract：Ignoring axial constraints leads to erors in calculation of evaluation parameters for various strength failure modes of rotor structures with axial constraints，such as solid permanent magnet rotors. In order to rapidly and accurately identify the evaluation parameters for the strength failure modes of solid permanent magnet rotors and enhance the reliability of the integrated design of such motors，a high-power solid high-speed permanent magnet synchronous motor for air compressors was taken as the research object.Combining the theories of material mechanics and thermodynamics，static analytical models for solid permanent magnet rotors with and without axial constraints were established，respectively. Calculation methods for the evaluation parameters of three rotor strength failure modes with and without axial constraints were proposed. On this basis，the differences in the effects of different speeds and temperatures on the three failure modes of the solid permanent magnet rotor under conditions with and without axial constraints were comparatively studied，revealing the influence laws of axial constraints on the evaluation parameters of various rotor failure modes. Finally，the rotor integrated design and strength verification of a 38000r/min solid high-speed permanent magnet motor were completed using the proposed methods. Correctness of the proposed methods was verified by combining finite element simulation and prototype experiments.

Keywords：high-speed permanent magnet motor; rotor stress；axial constraints;； rotor strength failure ;rotor reliability

0引言

近年来，随着驱动电机领域的发展，为提高驱动电机功率等级，该领域呈现出高转速化的发展趋势[1-3]，目前大功率高速永磁电机在空气压缩机、鼓风机等气动机械领域得到了广泛地应用。（剩余18943字）