Electrothermal combined optimization on notch in air-cooled high-speed permanent-magnet generator

Zhang, Xiaochen; Li, Weili; Baoquan, Kou; Cao, Junci; Cao, Haichuan; Gerada, C.; Zhang, He

Abstract

A 30kVA, 96000rpm, air cooled high-speed permanent magnetic generator (HSPMG) is investigated in this paper. Considering effects on both the magnetic circuit and heat transfer paths comprehensively, the stator slot notch in this HSPMG is optimized. First, by using the time-stepping finite element method, the transient electromagnetic fields of HSPMG is numerically calculated, and the electromagnetic losses in different components are obtained. Then, after the determination of other mechanical losses in such a machine, a three-dimensional fluid-thermal coupling calculation model is established, and the working temperature distribution in the HSPMG is studied. Thus, the electromagnetic-fluid-thermal coupling analysis method on the HSPMG is proposed, by using which the influences of machine notch height on machine magnetic circuit and cooling air flowing path are investigated. Meanwhile, both the electromagnetic performance and the temperature distribution in HSPMG with different stator notch height are studied, and a series of analytical equations are deduced to describe the variations of machine performances with stator notch. By using the proposed unbalance relative weighting method, the notch height is optimized to enhance the performance of HSPMG. The obtained conclusions could provide reference for HSPMG electromagnetic calculation, cooling system design, and optimization design.

Citation

Zhang, X., Li, W., Baoquan, K., Cao, J., Cao, H., Gerada, C., & Zhang, H. (2014). Electrothermal combined optimization on notch in air-cooled high-speed permanent-magnet generator. IEEE Transactions on Magnetics, 51(1), https://doi.org/10.1109/TMAG.2014.2332437

• Journal Article Type: Article
• Acceptance Date: Jun 18, 2014
• Publication Date: Jun 24, 2014
• Deposit Date: Aug 30, 2016
• Publicly Available Date: Aug 30, 2016
• Journal: IEEE Transactions on Magnetics
• Print ISSN: 0018-9464
• Electronic ISSN: 1941-0069
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 51
• Issue: 1
• DOI: https://doi.org/10.1109/TMAG.2014.2332437
• Keywords: High Speed Permanent Magnetic Generator, Electromagnetic, Thermal, Fluid, Optimization
• Public URL: https://nottingham-repository.worktribe.com/output/730179
• Publisher URL: http://ieeexplore.ieee.org/document/6842635/?arnumber=6842635
• Additional Information: c2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
• Contract Date: Aug 30, 2016