Trailing Edge PM Demagnetization in Surface PM Synchronous Motors: Analysis and Detection

Jigyun Jeong, Hyeonjun Lee, Marcos Orviz Zapico, Sang Bin Lee, David Diaz Reigosa, Fernando Briz del Blanco

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Irreversible demagnetization of permanent magnets (PM) in PM synchronous motors (PMSM) degrades the performance and efficiency of the machine and drive system. Demagnetizing MMF applied to PMs operating at high temperature is known as one of the leading root causes of irreversible PM demagnetization. This is most likely to cause of demagnetization on the trailing edge of the PMs in all poles, as will be shown through simulation in this work. However, most of the work on detecting demagnetization faults focus on uniform or partial (local) PM demagnetization. In this paper, a comparative evaluation of back-EMF, stator current/voltage, and airgap flux analysis on the detectability of trailing edge PM demagnetization is given. It is shown that it is difficult to detect this type of fault with back-EMF or stator current/voltage based analysis, since trailing edge demagetization does not produce asymmetry between PMs. An experimental study on a 380 V, 8 pole, 1.8 kW surface PMSM with trailing edge PM demagnetization shows that airgap flux-based detection is the most reliable means of detecting this fault.

Original languageEnglish
Title of host publication2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728193878
DOIs
Publication statusPublished - 2022
Event2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022 - Detroit, United States
Duration: 2022 Oct 92022 Oct 13

Publication series

Name2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022

Conference

Conference2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
Country/TerritoryUnited States
CityDetroit
Period22/10/922/10/13

Bibliographical note

Publisher Copyright:
© 2022 IEEE.

Keywords

  • Airgap Flux
  • Back-EMF Voltage
  • Fault Detection
  • Irreversible Demagnetization
  • Permanent Magnet Synchronous Motors
  • Spectral Analysis
  • Stator Current

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Safety, Risk, Reliability and Quality
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Control and Optimization

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