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Calculation and analysis of unbalanced magnetic pulls of different stator winding setups in static eccentric induction motor |
Yang Zhou(周洋), Xiaohua Bao(鲍晓华), Mingna Ma(马明娜), Chunyu Wang(王春雨) |
School of Electrical Engineering and Automation, Hefei University of Technology, Hefei, China |
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Abstract In large-scale electric machines, unbalanced magnetic pull (UMP) caused by eccentricity usually results in stator-rotor rub, so it is necessary to investigate the amplitude and the influencing factors. This paper takes the squirrel-cage induction motor as an example. A magnetic loop model of an induction motor is established by an analytical method. The impact of stator winding setup (parallel branch and pole pairs) on each magnetomotive force (MMF) and unbalanced magnetic pull is analyzed. Using the finite element simulation method, the spatial and time distribution of flux density of the rotor outer circle under static eccentricity is obtained, and the unbalanced magnetic pull calculation caused by static eccentricity is completed. The conclusion of the influence of stator winding on the size of unbalanced magnetic pull provides reliable gist for motor noise and vibration analysis, and especially provides an important reference for large induction motor design.
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Received: 17 March 2018
Revised: 17 May 2018
Accepted manuscript online:
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PACS:
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84.50.+d
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(Electric motors)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51677051 and 51377039) and the Fund from the Anhui Province Key Laboratory of Large-scale Submersible Electric Pump and Accoutrements. |
Corresponding Authors:
Xiaohua Bao
E-mail: sukz@ustc.edu
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Cite this article:
Yang Zhou(周洋), Xiaohua Bao(鲍晓华), Mingna Ma(马明娜), Chunyu Wang(王春雨) Calculation and analysis of unbalanced magnetic pulls of different stator winding setups in static eccentric induction motor 2018 Chin. Phys. B 27 088401
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