University of Oulu

A. Credo, E. Kurvinen, I. Petrov, E. Scherman, J. Sopanen and J. Pyrhönen, "Materials Applicable to an Axially-Laminated Synchronous Reluctance Machine Considering Mechanical and Electromagnetic Aspects," in IEEE Transactions on Industry Applications, doi: 10.1109/TIA.2023.3309285

Materials applicable to an Axially-Laminated Synchronous Reluctance Machine considering mechanical and electromagnetic aspects

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Author: Credo, Andrea1; Kurvinen, Emil2; Petrov, Ilya3;
Organizations: 1Department of Industrial and Information Engineering and Economics, University of L'Aquila, L'Aquila, Italy
2Materials and Mechanical Engineering, University of Oulu, Oulu, Finland
3School of Energy Systems, Lappeenranta–Lahti University of Technology, Lappeenranta, Finland
4Department of Mechanical Engineering, Lappeenranta–Lahti University of Technology LUT, Lappeenranta, Finland
5Department of Technology, LAB University of Applied Sciences, Lappeenranta, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 8 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2023
Publish Date: 2023-10-04


High-speed electric machines aim for compact, direct-driven elevated speed applications and highly efficient operation, especially when a gearbox can be avoided. The design of these types of machines is highly iterative, combining multiphysics optimization and leading to custom types of machines that fulfill the application-specific requirements. The Axially Laminated Synchronous Reluctance Machine (ALASynRM) with a solid rotor is one of the motor types that can be considered for high-speed applications. An axially laminated solid rotor structure combines magnetic and nonmagnetic layers rigidly bonded to each other by vacuum brazing, hot isostatic pressing, soldering, explosion welding, or even additive manufacturing. In this study, six nonmagnetic materials and nine magnetic materials are cross-compared. The results show clear differences in performance, efficiency, and physical properties of the rotor when made of different material combinations and can thereby suggest the best pairs when the application-specific performance criteria are known. The study is carried out on a 12 kW machine with a maximum speed of 24000 rpm.

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Series: IEEE transactions on industry applications
ISSN: 0093-9994
ISSN-E: 1939-9367
ISSN-L: 0093-9994
Issue: Online first
DOI: 10.1109/tia.2023.3309285
Type of Publication: A1 Journal article – refereed
Field of Science: 214 Mechanical engineering
Funding: This research was conducted with the support of the Academy of Finland’s Centre of Excellence in High-Speed Energy Conversion Systems.
Copyright information: © The Author(s) 2023. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see