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International Journal of Rotating Machinery
Volume 2017 (2017), Article ID 9545238, 12 pages
https://doi.org/10.1155/2017/9545238
Research Article

Influence of End Structure on Electromagnetic Forces on End Winding of a 1550 MW Nuclear Generator

1Chongqing University, Chongqing 400044, China
2Research and Test Center, Dongfang Electrical Machinery Co., Ltd., Deyang, Sichuan Province 618000, China

Correspondence should be addressed to Song Huang

Received 22 March 2017; Revised 4 August 2017; Accepted 1 October 2017; Published 29 October 2017

Academic Editor: Paolo Pennacchi

Copyright © 2017 Chong Zeng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A 3D electromagnetic model of the end region of a 1550 MW nuclear generator is set up. The electromagnetic forces on the involute and nose parts of the end winding under a rated operation are obtained through the 3D time-step finite element method. The electromagnetic forces on different coils in the same phase are analyzed. By changing the rotor’s relative length and stator coil’s linear length in the 3D electromagnetic model, the electromagnetic force distributions on the end winding are obtained. The influence of each structure change on the electromagnetic force in different directions is studied in detail. Conclusions that can be helpful in decreasing the electromagnetic forces on the end winding through optimizing the end region design are presented.