Ma, J. and Zhu, Z.Q. orcid.org/0000-0001-7175-3307 (2019) Optimal split ratio in small high speed PM machines considering both stator and rotor loss limitations. CES Transactions on Electrical Machines and Systems, 3 (1). pp. 3-11. ISSN 2096-3564
Abstract
The split ratio which is defined as the ratio between rotor and stator outer diameters is critical for permanent magnet (PM) machines. In this paper, the split ratio in small high speed PM machines is optimized analytically by considering both stator and rotor loss limitations. By this way, the thermal constrains in both stator and rotor parts can be taken into account. It shows that both losses can significantly affect the optimal split ratio and the machine performance. By considering the influence of rotor losses, especially the rotor eddy current loss, the optimal split ratio is increased significantly in certain scenarios. The output torque is calculated analytically and the influences of several key design parameters on the optimal split ratio, i.e. slot/pole combinations and magnet materials, are also investigated in details. Finally, finite element (FE) analyses are carried out for validating of the analytical model.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 CES. |
Keywords: | High speed; permanent magnet; split ratio |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 31 May 2019 15:12 |
Last Modified: | 31 May 2019 15:12 |
Published Version: | https://ieeexplore.ieee.org/abstract/document/8677... |
Status: | Published |
Publisher: | China Electrotechnical Society |
Refereed: | Yes |
Identification Number: | 10.30941/cestems.2019.00002 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:146749 |