Skip to main content

Research Repository

Advanced Search

High-Speed Solid Rotor Permanent Magnet Machines: Concept and Design

Arumugam, Puvaneswaran; Xu, Zuyuan; La Rocca, A.; Vakil, Gaurang; Dickinson, Matthew; Amankwah, Emmanuel K.; Hamiti, Tahar; Bozhko, Serhiy; Gerada, C.; Pickering, Steve


Puvaneswaran Arumugam

Zuyuan Xu

Emmanuel K. Amankwah

Tahar Hamiti

Professor of Aircraft Electric Power Systems

Steve Pickering


© 2015 IEEE. This paper proposes a novel solid rotor topology for an interior permanent magnet (IPM) machine, adopted in this case for an aircraft starter-generator design. The key challenge in the design is to satisfy two operating conditions that are a high torque at start and a high speed at cruise. Conventional IPM topologies that are highly capable of extended field weakening are found to be limited at high speed due to structural constraints associated with the rotor material. To adopt the IPM concept for high-speed operation, it is proposed to adopt a rotor constructed from semimagnetic stainless steel, which has a higher yield strength than laminated silicon steel. To maintain minimal stress levels and also minimize the resultant eddy current losses due to the lack of laminations, different approaches are considered and studied. Finally, to achieve a better tradeoff between the structural and electromagnetic constraints, a novel slitted approach is implemented on the rotor. The proposed rotor topology is verified using electromagnetic, static structural, and dynamic structural finite-element analyses. An experiment is performed to confirm the feasibility of the proposed rotor. It is shown that the proposed solid rotor concept for an IPM fulfils the design requirements while satisfying the structural, thermal, and magnetic limitations.


Arumugam, P., Xu, Z., La Rocca, A., Vakil, G., Dickinson, M., Amankwah, E. K., …Pickering, S. (2016). High-Speed Solid Rotor Permanent Magnet Machines: Concept and Design. IEEE Transactions on Transportation Electrification, 2(3), 391-400.

Journal Article Type Article
Acceptance Date Jul 4, 2016
Online Publication Date Jul 18, 2016
Publication Date 2016-09
Deposit Date Jul 18, 2016
Publicly Available Date Jul 18, 2016
Journal IEEE Transactions on Transportation Electrification
Electronic ISSN 2332-7782
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 2
Issue 3
Pages 391-400
Series ISSN 2332-7782
Keywords More-electric; Aircraft; High speed machines; Permanent magnet; Interior; Starter-generator; Structural; Solid rotor
Public URL
Publisher URL
Copyright Statement Copyright information regarding this work can be found at the following address:
Additional Information c2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works


High speed solid rotor permanent magnet machines Concept and design.pdf (944 Kb)

Copyright Statement
Copyright information regarding this work can be found at the following address:

You might also like

Downloadable Citations