University of Oulu

T. Choudhury et al., "Design of Thick-Lamination Rotor Configuration for a High-Speed Induction Machine in Megawatt Class," 2022 International Conference on Electrical Machines (ICEM), 2022, pp. 738-744, doi: 10.1109/ICEM51905.2022.9910880.

Design of thick-lamination rotor configuration for a high-speed induction machine in megawatt class

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Author: Choudhury, Tuhin1; Narsakka, Juuso1; Martikainen, Iikka1;
Organizations: 1Department of Mechanical Engineering, Lappeenranta-Lahti University of Technology LUT, Lappeenranta, Finland
2Materials and Mechanical Engineering University of Oulu, Oulu, Finland
3Department of Electrical Engineering, Lappeenranta-Lahti University of Technology LUT, Lappeenranta, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 2.5 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2022
Publish Date: 2022-10-17


Solid rotors are preferred choice of topology for high-speed applications due to their robustness against high centrifugal forces at high speeds, ease of manufacturability, and higher temperature range. However, for peripheral speeds lower than 200 m/s, laminated rotor structure is preferred because of lower eddy current losses resulting in higher efficiency. However, laminated rotors are complex to manufacture, sensitive to temperature and have vibration and mechanical integrity related issues. As a compromise between these two designs in terms of mechanical strength and efficiency, this study investigates a radial flux 2 MW, 15 krpm induction motor rotor core made of thick laminations. The baseline dimensions of the thick-lamination rotor design are calculated using analytical equations considering aspects such as mechanical stresses, rotordynamics, and bearing parameters. Lastly, the lamination to lamination contact behavior under unbalance load is analyzed for a simplified model and their effect on natural frequencies is studied.

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Series: International Conference on Electrical Machines
ISSN: 2381-4802
ISSN-E: 2473-2087
ISSN-L: 2381-4802
ISBN: 978-1-6654-1432-6
ISBN Print: 978-1-6654-1433-3
Pages: 738 - 744
DOI: 10.1109/icem51905.2022.9910880
Host publication: 2022 international conference on electrical machines (ICEM)
Conference: International Conference on Electrical Machines
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
214 Mechanical engineering
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