Enhanced Vibration Noise Calculation Model for Permanent Magnet Synchronous Motors(PMSM)Based on High-frequency Modal Damping Ratio Identification

LI Xiaohua; LU Yue; LIU Yudong; LI Guangxu; ZOU Liangchuan; TIAN Xue

doi:10.13296/j.1001-1609.hva.2026.03.013

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Enhanced Vibration Noise Calculation Model for Permanent Magnet Synchronous Motors(PMSM)Based on High-frequency Modal Damping Ratio Identification

Research & Analysis | 更新时间：2026-03-11

- Enhanced Vibration Noise Calculation Model for Permanent Magnet Synchronous Motors(PMSM)Based on High-frequency Modal Damping Ratio Identification
- High Voltage Apparatus Vol. 62, Issue 3, Pages: 106-114(2026)
- 作者机构：
  
  上海电力大学电气工程学院，上海 200090
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.03.013
  CLC：
- Received：14 July 2025，
  
  Revised：2025-09-20，
  
  Published：16 March 2026
- 稿件说明：
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LI Xiaohua, LU Yue, LIU Yudong, et al. Enhanced Vibration Noise Calculation Model for Permanent Magnet Synchronous Motors(PMSM)Based on High-frequency Modal Damping Ratio Identification[J]. High Voltage Apparatus, 2026, 62(3): 106-114.
DOI：

LI Xiaohua, LU Yue, LIU Yudong, et al. Enhanced Vibration Noise Calculation Model for Permanent Magnet Synchronous Motors(PMSM)Based on High-frequency Modal Damping Ratio Identification[J]. High Voltage Apparatus, 2026, 62(3): 106-114. DOI： 10.13296/j.1001-1609.hva.2026.03.013.

摘要

高频模态阻尼对整数槽多极对数电机振动噪声计算模型准确性具有重要作用，由于锤击实验带宽限制，高频模态阻尼比无法识别。为此文中提出一种高频模态阻尼比识别方法：通过锤击法模态实验测试低频固有频率振型及阻尼比，同时考虑模态频率和阶次影响建立分段阻尼模型，基于最小二乘原理，根据实验测得的低频模态数据拟合分段阻尼模型参数，基于该模型估算高频模态阻尼比。利用文中方法对一台48槽8极永磁同步电机高频模态阻尼比进行识别，建立“电磁—结构振动—噪声”多物理域联合振动噪声仿真模型，提高振动噪声计算模型精度，最后进行样机振动噪声实验验证了高频阻尼识别方法的正确性。

Abstract

High frequency modal damping plays an important role in the accuracy of vibration noise calculation models for integer slot multipole log motors. However

high frequency modal damping ratiocannot be identifieddue to bandwidth limitations of hammering experiments.Therefore

in this paper a method for identifying the damping ratio of highfrequency modes is proposed. The low frequency natural frequency modes and damping ratio is tested by hammering modal experiment and

at the same time

a segmental damping model is set up by taking into account the effects of modal frequency and order. Based on the least squares principle

the parameters of the segmental damping model are identified by fitting the experimentally measured low-frequency modal data

and the highfrequency modal damping ratio is estimated based on this model. The method in this paper is used to identify the high frequency modal damping ratio of a 48-slot

8-pole permanent magnet synchronous motor

and a‘electromagnetic-structurenoise’multi-physical domain vibration noise simulation model is set upso to improve accuracy of the vibration noise calculation model. Finally

the correctness of the high frequency damping idetification method is verified by the vibration noise experiment of the sample.

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references

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