Improving the Saliency of a High Speed SynRel Rotor by using High Strength Martensitic Sleeve

Ram Kumar, R. M.; Vakil, Gaurang; La Rocca, Antonino; Gerada, David; Gerada, Chris; Fernandes, B. G.

Abstract

High strength magnetic steel laminations are the invariable choice to achieve the power density demands of high speed electric machines required in the automotive industry. However, the cost competitive automobile market, favours the use of conventional materials. Consequently, in this paper, a high strength martensitic sleeve rotor configuration is identified as an ideal choice to maximize the use of conventional materials in a high speed synchronous reluctance (SynRel) machine. A 3.5 kW, 60 krpm high speed SynRel machine is designed for an electric assist turbocharger (EAT) to disclose the benefits of sleeve rotor configuration. The performance of the sleeve rotor is on par and superior to a SynRel machines employing high and low strength laminations respectively. Finally, a multiphysics optimization is performed to ascertain the superiority of sleeve rotor SynRel configuration. Based on this, the sleeve rotor produces 4.5% and 46.7% more torque than the SynRel machines using high and low strength laminations with conventional rotor configurations. Additionally, this is achieved with nearly 90% by volume of conventional rotor lamination.

Citation

Ram Kumar, R. M., Vakil, G., La Rocca, A., Gerada, D., Gerada, C., & Fernandes, B. G. (2021, January). Improving the Saliency of a High Speed SynRel Rotor by using High Strength Martensitic Sleeve. Presented at 2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET), Hyderabad, India

• Presentation Conference Type: Edited Proceedings
• Conference Name: 2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET)
• Start Date: Jan 21, 2021
• End Date: Jan 23, 2021
• Acceptance Date: Nov 25, 2020
• Online Publication Date: Mar 16, 2021
• Publication Date: Jan 21, 2021
• Deposit Date: Jul 5, 2021
• Publicly Available Date: Jul 5, 2021
• Publisher: Institute of Electrical and Electronics Engineers
• Book Title: 2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET)
• ISBN: 9781728156811
• DOI: https://doi.org/10.1109/sefet48154.2021.9375705
• Public URL: https://nottingham-repository.worktribe.com/output/5757093
• Publisher URL: https://ieeexplore.ieee.org/document/9375705
• 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.