Radial Force Analysis and Optimization of Interior Permanent Magnet Traction Motor for Reduction of Electromagnetic Vibration

H. Li, M. Cui, T. Zou, Xiaochen Zhang, Alan Zhang, Z. Xu, D. Gerada, C. Gerada

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

Abstract

Interior permanent magnet (IPM) machines are subject to rich harmonics of air-gap magnetic field, which correspond to electromagnetic forces and resulting noise, vibration, and harshness (NVH) issues. In this paper, the NVH issue is evaluated based on a 160 kW IPM motor with focus on zeroth-mode vibration led by radial forces. Based on FEA, the leading radial force harmonics are analyzed and effectively reduced by rotor notching and asymmetric stator slotting techniques. Harmonic response analysis is conducted to verify the radial force optimization results. The results show 97.0% and 54.7% amplitude reduction on 48th temporal harmonic of total radial force for open-circuit and on-load operation, respectively. This corresponds to a 4.8 dB equivalent radiated power level (ERPL) reduction at on-load operation. The optimization approach is found effective in alleviating vibration issues of IPM traction motors without sacrificing output torque capability and will be validated by following-up prototype tests.

Original languageEnglish
Title of host publication2022 International Conference on Electrical Machines, ICEM 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1906-1912
Number of pages7
ISBN (Electronic)9781665414326
DOIs
Publication statusPublished - 2022
Event2022 International Conference on Electrical Machines, ICEM 2022 - Valencia, Spain
Duration: 5 Sep 20228 Sep 2022

Publication series

Name2022 International Conference on Electrical Machines, ICEM 2022

Conference

Conference2022 International Conference on Electrical Machines, ICEM 2022
Country/TerritorySpain
CityValencia
Period5/09/228/09/22

Keywords

  • electric vehicle
  • electromagnetic vibration
  • IPM
  • NVH
  • radial force
  • rotor notch
  • zeroth-mode vibration

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

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