Online monitoring and diagnostics of permanent magnet synchronous motors (PMSMs) is becoming important with the increasing demand in PMSM applications. Most of the research effort focuses on motor current signature analysis (MCSA) as it can provide remote, online monitoring at low cost. However, all types of defects that produce asymmetries in the PMSM rotor or load produce identical rotor rotational frequency components. This is a serious limitation when applying MCSA since it can produce false indications and degrade the sensitivity of fault detection. The requirement of complex time-frequency analysis techniques is another limitation of MCSA for applications with speed variations. In this paper, the feasibility of using analog Hall sensor signals to complement MCSA for detection and classification of rotor- and load-related defects is investigated. It is shown that Hall sensors installed in machines for initial rotor position estimation can be used with minimal hardware modifications to detect and classify signatures produced by the rotor and load for cases where MCSA fails, even during transient conditions. Experimental testing performed on an interior permanent magnet synchronous motor (IPMSM) under eccentricity, local demagnetization, and load unbalance conditions shows that the reliability and sensitivity of fault detection in PMSM systems can be improved at low added cost.
Bibliographical noteFunding Information:
Dr. Fernandez was the recipient of the fellowship of the Personnel Research Training Program funded by the Regional Ministry of Education and Science of the Principality of As-turias, in 2013, and four IEEE Industry Applications Society Conference Prize Paper Awards.
Manuscript received October 5, 2018; revised January 8, 2019 and February 12, 2019; accepted April 8, 2019. Date of publication April 14, 2019; date of current version June 29, 2019. Paper 2018-IDC-1024.R2, presented at the 2018 IEEE Energy Conversion Congress and Exposition, Sep. 23–27, Portland, OR, USA, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Industrial Drives Committee of the IEEE Industry Applications Society. This work was supported by the “Human Resources Program in Energy Technology” of the Korea Institute of Energy Technology Evaluation and Planning, funded by the Ministry of Trade, Industry & Energy, South Korea under Grant 20174030201820. (Corresponding author: Sang Bin Lee.) Y. Park, C. Yang, and S. B. Lee are with the Department of Electrical Engineering, Korea University, Seoul 02841, South Korea (e-mail: yonghyun.park@ eecs.korea.ac.kr; firstname.lastname@example.org; email@example.com).
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- Axial leakage flux
- Hall effect sensor
- PM synchronous motor (PMSM)
- condition monitoring
- fault classification
- load unbalance
- permanent magnet (PM) demagnetization
- rotor eccentricity
ASJC Scopus subject areas
- Control and Systems Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering