Prediction and Diagnosis for Unsteady Electromagnetic Vibroacoustic of IPMSMs for Electric Vehicles Considering Rotor Step Skewing and Current Harmonics

Shengsen Zhou, Conggan Ma, Nic Zhang, Yue Guo, Michele Degano, Chris Gerada, Feifei Bu, Jinling Zeng, Qiongyao Li, Yuansheng An

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Abstract

Purpose: This study provides a detailed investigation on the prediction and diagnosis of unsteady electromagnetic vibroacoustic performance of IPMSMs for electric vehicles under typical unsteady operating conditions with consideration of rotor step skewing and current harmonics. Methods: Firstly, the control model considering the influence of PWM carrier modulation and rotor step skewing is established. Based on this, the currents of the IPMSM under unsteady operating conditions (driving condition and feedback braking condition) are obtained. Accordingly, the currents calculated through the control model are used as the excitation source of electromagnetic finite element. Then, the electromagnetic vibroacoustic performance under unsteady operating conditions is calculated through electromagnetic force subsection mapping and acoustic transfer vector (ATV) method. Moreover, the conditions where resonance vibroacoustic occurs are diagnosed. Finally, the results of prediction and diagnosis are fully verified by experiments of multiple physical fields. Results and Conclusions: The amplitude errors between prediction results and test results are less than 3.2%. The influence of current harmonics on electromagnetic vibroacoustic can be predicted. The frequency range and speed range of predicted peak vibroacoustic are consistent with the experimental results. The rotor step skewing can be used to weaken the vibroacoustic amplitude of IPMSMs under typical unsteady conditions in the full speed range. This study provides guidance for prediction and diagnosis for electromagnetic vibroacoustic performance of IPMSMs under typical unsteady operating conditions.

Original languageEnglish
Pages (from-to)821-836
Number of pages16
JournalJournal of Vibration Engineering and Technologies
Volume12
Issue number1
Early online date16 Feb 2023
DOIs
Publication statusPublished - 31 Jan 2024

Keywords

  • Electromagnetic vibroacoustic
  • IPMSMs
  • Rotor step skewing
  • Unsteady operating conditions

ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Mechanical Engineering

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