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DOI: https://doi.org/10.15407/techned2016.02.042


Journal Tekhnichna elektrodynamika
Publisher Institute of Electrodynamics National Academy of Science of Ukraine
ISSN 1607-7970 (print), 2218-1903 (online)
Issue № 2, 2016 (March/April)
Pages 42 – 48


Zhiyan Zhang1, Zehui Xie1, Hongzhong Ma2, Qin Zhong3
1 – Zhengzhou University of Light Industry, College of Electrical and Information Engineering,
Dongfeng Road No. 5 Zhengzhou City Henan Province China,
e-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript ; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
2 – College of Energy and Electrical Engineering, Hohai University,
Fucheng West Road No. 8 Nanjing City Jiangsu Province, 210098, China,
e-mail: Hongzhong Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
3 – Huzhou Power Company, Electric Power Company of Zhejiang Province,
Fenghuang Road No.777 Huzhou City Zhejiang Province, 313000, China,
e-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript



According to magnetic field superposition principle and characteristic of square wave series, back-EMF of permanent magnet synchronous motor (PMSM) under demagnetization fault condition is decomposed into health component and demagnetization fault component. A operation of mathematical model of single slot and single phase no-load back-EMF, when demagnetization fault of different degree occurred in any magnetic body, any single pole and any multiple pole, is presented. The back-EMF mathematical model and the finite element simulation model results for 42 kW - PMSM, which has 8 poles and V-shaped permanent magnet rotor structure are compared, that allowed to verify the mathematical model. The results show that the back-EMF waveform of the slot winding can reflect the specific position and the severity of the demagnetization poles. The single phase back-EMF waveform can reflect only demagnetization conditions of all poles, but can not identify the specific position of the demagnetization poles. References 9, figures 5.


Key words: PMSM; demagnetization fault; back-EMF; mathematical model; simulation model.


Received:    18.11.2015
Accepted:    04.01.2016
Published:  18.03.2016



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