Multi-Sector Windings For Bearing Relief E-Machine: Saturation and Cross Coupling Effects

Mahmoud, Hanafy; Valente, Giorgio; Degano, Michele; Nardo, Mauro Di; Gerada, Chris; James, Barry

Abstract

The key driving elements for any electrical machine (EM) used in aerospace and other safety critical applications are the reliability, mass, volume, and efficiency. To reduce mass/volume while satisfying the power required, the option is to increase the EM speed. The possible failure of the mechanical bearings at high speed, the higher bearing losses, and the excessive rotor displacement at high speed are some of the design challenges encountered when the speed increases. The main objectives of applying this MSBRM concept is to achieve the magnetic levitation of the rotor to (a) overcome the bearing reliability issues, as well as eliminating the bearing friction, (b) apply online radial force control on the rotor to mitigate the rotor displacement/whirling, and (c) reducing requirements for maintenance and monitoring. In this paper, the multi-sector windings bearing relief electric machine (MSBRM) concept is applied to high torque density permanent magnet EM. The electromagnetic characterization and the radial force control concept of the highly saturated EM has been studied deeply in this paper.

Citation

Mahmoud, H., Valente, G., Degano, M., Nardo, M. D., Gerada, C., & James, B. (2020, August). Multi-Sector Windings For Bearing Relief E-Machine: Saturation and Cross Coupling Effects. Presented at Proceedings - 2020 International Conference on Electrical Machines, ICEM 2020, Gothenburg, Sweden

• Presentation Conference Type: Edited Proceedings
• Conference Name: Proceedings - 2020 International Conference on Electrical Machines, ICEM 2020
• Start Date: Aug 23, 2020
• End Date: Aug 26, 2020
• Acceptance Date: May 26, 2020
• Online Publication Date: Dec 1, 2020
• Publication Date: Aug 23, 2020
• Deposit Date: Feb 26, 2021
• Publicly Available Date: Feb 26, 2021
• Publisher: Institute of Electrical and Electronics Engineers
• Pages: 246-252
• ISBN: 9781728199450
• DOI: https://doi.org/10.1109/icem49940.2020.9270761
• Public URL: https://nottingham-repository.worktribe.com/output/5352249
• Publisher URL: https://ieeexplore-ieee-org/document/9270761
• 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.; ; Project MAGLEV (Measurement and Analysis of Generator Bearing Loads and Effciency with Validation); European Union (EU), Horizon2020 – Clean Sky 2 Joint Untertaking; Grant number 865364; ; The publication reflects only the author's view and the JU is not responsible for any use that may be made of the information it contains.