Thermal Model Approach to Multisector Three-Phase Electrical Machines

Zhang, Hengliang; Giangrande, Paolo; Sala, Giacomo; Xu, Zeyuan; Hua, Wei; Madonna, Vincenzo; Gerada, David; Gerada, Chris

Abstract

© 1982-2012 IEEE. Multisector machines reveal a high fault-tolerant capability, since failure events can be isolated by de-energizing the faulty sector, while the healthy ones contribute in delivering the required power. This article is focused on the thermal analysis of multisector three-phase machines in healthy and faulty operations. First, a 3-D lumped parameter thermal network (LPTN) of a single sector is developed and finetuned against experimental data, through a genetic algorithm for identifying the uncertain parameters. According to the operating conditions, the varying housing surface temperature affects the heat exchanged to the ambient. Hence, an analytical formula is proposed to adjust the natural convection coefficient value depending on the operating condition. Then, the 3-D LPTN, modeling the whole machine, is built aiming at investigating the thermal behavior during faulty conditions. Finally, the complete 3-D LPTN is employed for predicting the machine thermal performance under several faulty conditions. Furthermore, the current overload experienced by the healthy sector (in order to keep the same torque level as during the pre-fault operation) is determined, in accordance with the magnet wire thermal class. The effectiveness of the 3-D LPTN in predicting the temperature is experimentally demonstrated.

Citation

Zhang, H., Giangrande, P., Sala, G., Xu, Z., Hua, W., Madonna, V., Gerada, D., & Gerada, C. (2021). Thermal Model Approach to Multisector Three-Phase Electrical Machines. IEEE Transactions on Industrial Electronics, 68(4), 2919-2930. https://doi.org/10.1109/TIE.2020.2977559

• Journal Article Type: Article
• Acceptance Date: Feb 15, 2020
• Online Publication Date: Mar 6, 2020
• Publication Date: Apr 1, 2021
• Deposit Date: Apr 17, 2020
• Publicly Available Date: Apr 17, 2020
• Journal: IEEE Transactions on Industrial Electronics
• Print ISSN: 0278-0046
• Electronic ISSN: 1557-9948
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 68
• Issue: 4
• Pages: 2919-2930
• DOI: https://doi.org/10.1109/TIE.2020.2977559
• Keywords: Stator windings , Thermal analysis , Windings , Convection
• Public URL: https://nottingham-repository.worktribe.com/output/4299592
• Publisher URL: https://ieeexplore.ieee.org/document/9027137
• Additional Information: © 2020 IEEE.Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, 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 component of this work in other works.