电机与控制应用2026，Vol.53Issue(4)：382-390,9.DOI:10.12177/emca.2026.152
气隙非均匀分布的内置式永磁同步电机振动噪声分析
Analysis of Vibration and Noise of Interior Permanent Magnet Synchronous Motors with Non-Uniform Air Gap Distribution
摘要
Abstract
[Objective]Electromagnetic vibration characteristics are a core performance indicator of interior permanent magnet synchronous motor(IPMSM)for electric vehicles,directly determining their operational stability and playing a key role in noise control.Current research primarily focuses on the electromagnetic vibration features of IPMSM under normal operating conditions,while insufficient attention has been paid to the significant impact of stator and rotor deformations in practical scenarios.[Methods]This study focused on the air gap deformation caused by stator deformation and rotor mechanical stress deformation.The air gap permeance function after deformation was derived,and the expression of radial electromagnetic force for IPMSM under non-uniform air gap conditions was subsequently derived.Finite element simulations were conducted for validation.Finally,the difference in equivalent radiated power level on the motor housing surface before and after air gap deformation was calculated to clarify the variation patterns of vibration and noise.[Results]The simulation results demonstrated that:force waves of(n±m)p±ks orders(ks=1,2,3…8)were introduced by stator inner circular deformation through magnetic permeance modulation,depending on different deformation wave numbers.(n±m±2k)p-order force waves were generated by rotor mechanical deformation via the same modulation mechanism,and the amplitudes of inherent force waves were amplified.The low-order force waves modulated by stator deformation were found to easily couple with low-order structural modes at low rotational speeds,leading to non-negligible vibration noise.The inherent electromagnetic force wave amplitude was increased by rotor mechanical deformation at high speeds,leading to aggravated vibration.[Conclusion]This study reveals the correlation mechanism between stator/rotor deformation and electromagnetic vibration in IPMSM,providing a theoretical basis for the optimization of flux barriers and low-order modal decoupling under high-speed operating conditions.关键词
电磁振动/内置式永磁同步电机/气隙形变/振动噪声Key words
electromagnetic vibration/interior permanent magnet synchronous motor/air gap deformation/vibration and noise分类
信息技术与安全科学引用本文复制引用
王巍,裴堉,魏钰桀,宋志环,李明..气隙非均匀分布的内置式永磁同步电机振动噪声分析[J].电机与控制应用,2026,53(4):382-390,9.基金项目
辽宁省博士科研启动基金计划项目(2025-BS-0809) Doctoral Scientific Research Foundation Program of Liaoning Province(2025-BS-0809) （2025-BS-0809）
