Mechanical properties and insulation damage of PMSG stator end windings with eccentricity considerations

Dai, De Rui; He, Yu Ling; Xu, Ming Xing; Zhang, Wen; Fu, Zi Xiang; Gerada, David

Abstract

The mechanical properties and insulation damage of stator end windings in permanent magnet synchronous generator (PMSG) are investigated by theoretical analysis, finite element analysis (FEA) and experiment verification. First, a theoretical model of the winding electromagnetic force (EF) and vibration response before and after eccentricity faults are established. Then, the stress/strain distribution of the end windings under different working conditions is analyzed. Finally, the insulation damage behavior of end windings with initial cracks is studied and characterized using the stress intensity factor (SIF). The results indicate that the winding EF and vibration responses vary under different faults. The stress/strain at the joint of the winding is the largest, and the insulation layer has the maximum stress/strain under the same section. Additionally, the SIF amplitude of the crack at the winding joint is the largest. And the SIF amplitude of the crack will increase with the increase of fault degree/crack depth/crack length. The contribution of this paper lies in the comprehensive analysis of the winding EF distribution, vibration response, stress and strain, and insulation damage before and after eccentricity. This analysis can provide valuable reference for the health monitoring of PMSG eccentricity faults and the prevention of winding insulation damage.

Citation

Dai, D. R., He, Y. L., Xu, M. X., Zhang, W., Fu, Z. X., & Gerada, D. (2024). Mechanical properties and insulation damage of PMSG stator end windings with eccentricity considerations. Alexandria Engineering Journal, 105, 156-169. https://doi.org/10.1016/j.aej.2024.06.090

• Journal Article Type: Article
• Acceptance Date: Jun 28, 2024
• Online Publication Date: Jul 4, 2024
• Publication Date: 2024-10
• Deposit Date: Nov 26, 2024
• Publicly Available Date: Nov 26, 2024
• Journal: Alexandria Engineering Journal
• Print ISSN: 1110-0168
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 105
• Pages: 156-169
• DOI: https://doi.org/10.1016/j.aej.2024.06.090
• Keywords: permanent magnet synchronous generator (PMSG); end windings; eccentricity; mechanical characteristics; insulation damage
• Public URL: https://nottingham-repository.worktribe.com/output/42218714
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S1110016824006975?via%3Dihub
• Additional Information: This article is maintained by: Elsevier; Article Title: Mechanical properties and insulation damage of PMSG stator end windings with eccentricity considerations; Journal Title: Alexandria Engineering Journal; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.aej.2024.06.090; Content Type: article; Copyright: © 2024 The Author(s). Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University