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Demagnetization Detection for IPM-type BLDCMs According to Irreversible Demagnetization Patterns and Pole-Slot Coefficients
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  • Journal title : Journal of Power Electronics
  • Volume 16, Issue 1,  2016, pp.48-56
  • Publisher : The Korean Institute of Power Electronics
  • DOI : 10.6113/JPE.2016.16.1.48
 Title & Authors
Demagnetization Detection for IPM-type BLDCMs According to Irreversible Demagnetization Patterns and Pole-Slot Coefficients
Kang, Dong-Hyeok; Kim, Hyung-Kyu; Park, Jun-Kyu; Hyun, Seung-Ho; Hur, Jin;
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 Abstract
This paper proposes a method for detecting irreversible demagnetization using the harmonic analysis of back electromotive force (BEMF) in interior permanent magnet-type brushless DC motors. First, demagnetization patterns, such as equality, inequality, and weighted demagnetizations, are defined and classified by considering the possibility of demagnetization resulting from motor operating characteristics. Second, an available diagnostic model for the harmonic analysis of BEMFs is defined according to pole-slot coefficients because the characteristics of BEMFs under demagnetization conditions are affected by the combination of poles and slots. Third, BEMFs and their harmonic components under normal and demagnetization conditions are analyzed through simulation and experiment to verify the proposed demagnetization detection technique.
 Keywords
Brushless DC motors;Demagnetization;Demagnetization patterns;Fault diagnosis;Permanent magnet motors;Pole- slot coefficient;
 Language
English
 Cited by
 References
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