Detection of Radial and Axial Magnet Defects in PM Synchronous Motors

Kucukyildiz G., OCAK H., Yolacan E., AYDIN M.

2022 International Conference on Electrical Machines, ICEM 2022, Valencia, Spain, 5 - 08 September 2022, pp.1849-1854 identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/icem51905.2022.9910724
  • City: Valencia
  • Country: Spain
  • Page Numbers: pp.1849-1854
  • Keywords: Brushless Machines, Magnet Defects, Magnet Faults, Permanent Magnet Motors
  • Kocaeli University Affiliated: Yes


© 2022 IEEE.This paper presents a novel method for the detection of magnet cracks or defects through analysis of back electromotive force (EMF) voltage, line current and vibration signals for radial flux permanent magnet (PM) synchronous motors. An integer slot PM motor with 12 poles is used in the study. Different types of faults including both radial and axial magnet crack defects are studied in detail. Random forest based magnet defect detection is utilized and a classification scheme is proposed in order to analyze the changes in the harmonics arising from radial or axial magnet defects. The results clearly show that the harmonics is altered in such a manner that it is possible to determine not only the magnet fault but the type of the magnet defect using motor voltage, current or vibration data.