Affiliations: [a] School of Electrical Engineering and Automation, Hefei University of Technology, Hefei, Anhui, China | [b] Laboratory of Electric Drives Technology, Lappeenranta University of Technology, Lappeenranta, Finland
Correspondence:
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Corresponding author: Xiaohua Bao, School of Electrical Engineering and Automation, Hefei University of Technology, Hefei, Anhui, China. E-mail: sukz@ustc.edu.
Abstract: Eccentricity problem is always ineluctable in rotating electric machine, especially in large electric machine. Hence, the influence of eccentricity in operating machine is necessary to be investigated. According to the investigation, current of different parallel branches are varied under the same eccentricity. This paper focuses on comparative current analysis on two types of parallel branches in consideration of static and dynamic eccentricities. Parallel branch model in circumferential position is established for analysis and explanation of branch current due to eccentricity. Stator winding current and rotor wingding current are worked out under static and dynamic eccentricity at two types of parallel branches. Their winding losses are calculated for comparison, respectively. Finite element model simulations are used for validation.
Keywords: Static and dynamic eccentricity, parallel branch, current analysis, winding loss
