Modelling, Analysis and Design Considerations of Multi-Phase Bearingless Permanent Magnet Synchronous Machine

Marfoli, Alessandro; Nardo, Mauro Di; Garvey, Seamus; Degano, Michele; Vashisht, Rajiv; Turnbull, Robert; Gerada, Chris

Abstract

This paper presents a general multi-harmonics analytical model able to predict both torque and force behaviour of a multi-phase permanent magnet synchronous machine. This machine topology can be adopted in bearingless applications and in application where controlling the radial forces is deemed to be beneficial to reduce the system vibrations. The modelling approach is applied to a surface permanent magnet synchronous motor featuring a 6-phase symmetric winding configuration although the proposed model is general. The underlying mathematics behind the force and torque production is carefully described with emphasis on both assumptions and approximations. Finite element analysis are proposed for validation purpose of the proposed analytical model, thus highlighting benefits and limitations. Once validated, the model is used to draw general design guidelines for this kind of electrical machine highlighting the trade-off between the competitive needs of maximizing the torque and force capability while minimizing the interaction between force and torque production.

Citation

Marfoli, A., Nardo, M. D., Garvey, S., Degano, M., Vashisht, R., Turnbull, R., & Gerada, C. (2021). Modelling, Analysis and Design Considerations of Multi-Phase Bearingless Permanent Magnet Synchronous Machine. In 2021 IEEE Energy Conversion Congress and Exposition (ECCE) (4646-4653). https://doi.org/10.1109/ECCE47101.2021.9595524

• Conference Name: IEEE Energy Conversion Congress and Exposition (ECCE 2021)
• Conference Location: Vancouver, BC, Canada
• Start Date: Oct 10, 2021
• End Date: Oct 14, 2021
• Acceptance Date: May 1, 2021
• Online Publication Date: Nov 16, 2021
• Publication Date: Oct 10, 2021
• Deposit Date: Feb 16, 2022
• Publicly Available Date: Feb 16, 2022
• Publisher: IEEE
• Pages: 4646-4653
• Series Title: IEEE Energy Conversion Congress and Exposition (ECCE)
• Series ISSN: 2329-3721
• Book Title: 2021 IEEE Energy Conversion Congress and Exposition (ECCE)
• ISBN: 9781728161280
• DOI: https://doi.org/10.1109/ECCE47101.2021.9595524
• Public URL: https://nottingham-repository.worktribe.com/output/7470142
• Publisher URL: https://ieeexplore.ieee.org/document/9595524
• Additional Information: © 2021 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.