Open AccessNumerical Study on the Influence of Non-uniform Demagnetization of Permanent Magnet Synchronous Motor
Author(s) -
Wu Gao,
Yinquan Yu,
Yang Jinwen,
Qiping Chen,
Shaowei Zhou
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1754/1/012137
Subject(s) - demagnetizing field , electromotive force , magnet , torque , harmonics , counter electromotive force , amplitude , torque density , physics , synchronous motor , current density , voltage , materials science , mechanics , electrical engineering , magnetic field , magnetization , engineering , optics , quantum mechanics , thermodynamics
To study the influence of the non-uniform demagnetization of permanent magnets (PMs) on motor performance, this paper takes a two-phase four-pole Permanent Magnet Synchronous Motor (PMSM) as the research specimen. The influences of torque, phase current, back electromotive force (back-EMF), and radial magnetic density with different grades and types of demagnetization are analyzed. The simulation results show that as the degree of nonuniform demagnetization increases, the output torque and radial magnetic density gradually decrease, on the other hand, the phase current gradually increases. According to the change law of the amplitude of some harmonics of the back-EMF, it can be judged whether the motor has non-uniform demagnetization. This research conclusion can provide a theoretical basis for fault diagnosis of motor demagnetization.