Detection of airgap eccentricity for permanent magnet synchronous motors based on the d-axis inductance

Jongman Hong, Sang Bin Lee, Christian Kral, Anton Haumer

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

8 Citations (Scopus)

Abstract

The majority of the work performed for detecting eccentricity faults for permanent magnet synchronous motors (PMSM) focus on motor current signature analysis (MCSA), as it provides continuous on-line monitoring with existing current sensors. However, MCSA cannot be applied under nonstationary conditions and cannot distinguish faults with load torque oscillations, which are limitations for many PMSM drive applications. In this paper, it is shown that the d-axis inductance, Ld, decreases with increase in the severity of eccentricity due to the change in the degree of magnetic saturation, and it is proposed as a new fault indicator. The inverter can be used to perform a standstill test automatically whenever the motor is stopped, to measure L d for eccentricity testing independent of load variations or oscillations, which is not possible with MCSA. An FE and experimental study on a 10hp PMSM verifies that eccentricity can be detected independent of the load with high sensitivity and reliability.

Original languageEnglish
Title of host publicationSDEMPED 2011 - 8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives
Pages378-384
Number of pages7
DOIs
Publication statusPublished - 2011 Nov 21
Event8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2011 - Bologna, Italy
Duration: 2011 Sep 52011 Sep 8

Other

Other8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2011
CountryItaly
CityBologna
Period11/9/511/9/8

Keywords

  • Airgap Eccentricity
  • Condition Monitoring
  • Diagnostics
  • Magnetic Saturation
  • Motor Current Signature Analysis (MCSA)
  • Permanent Magnet Synchronous Motor

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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  • Cite this

    Hong, J., Lee, S. B., Kral, C., & Haumer, A. (2011). Detection of airgap eccentricity for permanent magnet synchronous motors based on the d-axis inductance. In SDEMPED 2011 - 8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (pp. 378-384). [6063651] https://doi.org/10.1109/DEMPED.2011.6063651