PM Halbach Arrays in Motors: Loss Reduction and Performance Improvements

Hebala, Ahmed; Nuzzo, Stefano; Connor, Peter H.; Giangrande, Paolo; Gerada, Chris; Galea, Michael

Abstract

© 2020 The Institute of Electrical Engineers of Japan. Halbach array configurations represent a common choice in high-performance electrical machines, since a stronger magnetic field is generated for the same Permanent Magnet (PM) volume. Hence, higher torque is developed, and the power density is enhanced. This paper investigates methodologies for reducing the PM losses in Halbach arrangements. A high power density propulsion motor is considered as a case-study and by using Finite Element (FE) software, sensitivity analyses are performed on the main design parameters. Strategies for loss reduction and performance improvements, in terms of torque ripple, total harmonic distortion, efficiency and power density, are investigated and proposed. The effectiveness of axial and radial segmentations, PM edge shape, and semi-magnetic slot wedges are evaluated. Finally, recommendations are made for designing a PM Halbach array.

Citation

Hebala, A., Nuzzo, S., Connor, P. H., Giangrande, P., Gerada, C., & Galea, M. (2020). PM Halbach Arrays in Motors: Loss Reduction and Performance Improvements. . https://doi.org/10.23919/ICEMS50442.2020.9291234

• Presentation Conference Type: Edited Proceedings
• Conference Name: 2020 23rd International Conference on Electrical Machines and Systems (ICEMS)
• Start Date: Nov 24, 2020
• End Date: Nov 27, 2020
• Acceptance Date: Jun 26, 2020
• Online Publication Date: Dec 22, 2020
• Publication Date: Nov 24, 2020
• Deposit Date: Feb 26, 2021
• Publicly Available Date: Feb 26, 2021
• Publisher: Institute of Electrical and Electronics Engineers
• Pages: 710-715
• Series Title: International Conference on Electrical Machines and Systems (ICEMS)
• Series ISSN: 2640-7841
• ISBN: 9781728189307
• DOI: https://doi.org/10.23919/ICEMS50442.2020.9291234
• Keywords: Torque, Torque measurement, Rotors, Permanent magnet motors, Synchronous motors, Traction motors, Power system measurements
• Public URL: https://nottingham-repository.worktribe.com/output/5352907
• Publisher URL: https://ieeexplore.ieee.org/document/9291234
• 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.