Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Diagnosis and discernment between eccentricity and demagnetization faults in PMSM drives

  • Koura, Mohamed Boudiaf (Laboratory of Electric Drives Development, Diagnosis Group, Department of Electrical Engineering, University of Sciences and Technology of Oran (USTO-MB)) ;
  • Boudinar, Ahmed Hamida (Laboratory of Electric Drives Development, Diagnosis Group, Department of Electrical Engineering, University of Sciences and Technology of Oran (USTO-MB)) ;
  • Aimer, Ameur Fethi (Laboratory of Electric Drives Development, Diagnosis Group, Department of Electrical Engineering, University of Sciences and Technology of Oran (USTO-MB)) ;
  • Bendiabdellah, Azzedine (Laboratory of Electric Drives Development, Diagnosis Group, Department of Electrical Engineering, University of Sciences and Technology of Oran (USTO-MB)) ;
  • Gherabi, Zakaria (Laboratory of Electric Drives Development, Diagnosis Group, Department of Electrical Engineering, University of Sciences and Technology of Oran (USTO-MB))
  • Received : 2020.07.17
  • Accepted : 2020.12.17
  • Published : 2021.03.20
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Abstract

This paper proposes a new approach that allows the diagnosis and the ability of discernment between the frequency signatures of eccentricity faults and those of demagnetization in a permanent magnet synchronous motor (PMSM). This approach is based on the application of a very selective band-pass filter in the stator current. A judicious calculation of the parameters of this filter makes it possible to extract only the frequency signatures of searched faults. The use of the relevant information on the magnitude and phase angle of the signatures, obtained by filtering, makes it possible to distinguish between both of the studied faults. The simple monitoring of the plotting in terms of polar coordinates of the combined information (magnitude/phase angle) of the signature's characteristic of these two faults allows for this discernment. Experimental results show the effectiveness of the proposed approach when it comes to the diagnosis reliability of demagnetization and the eccentricity faults in a PMSM.

Keywords

Acknowledgement

The authors would like to thank all the members of the Laboratory of Development of Electric Drives of the University of Sciences and Technology of Oran, Mohamed Boudiaf, USTO-MB, Algeria, for the help they brought to the experimental validation of this work.

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