Rudden, I., Li, G.-J. orcid.org/0000-0002-5956-4033, Kana, D.K. et al. (4 more authors) (2024) Space harmonic cancellation in a dual three-phase SPM machine with star-delta windings. IEEE Transactions on Energy Conversion, 39 (1). pp. 457-468. ISSN 0885-8969
Abstract
This paper proposes a dual 3-phase SPM machine with star-delta windings. The machine is based on the widely adopted 12s/10p configuration and employs a number of methods to suppress the two largest core loss causing MMF harmonics. Firstly, stator shifting is used to reduce the 7th order harmonic, which is then completely suppressed through the use of a second 3-phase converter operating at a 15° phase shift with regard to the first one. Secondly, each of the winding sets employs 3-phase star-delta winding that are able to completely cancel the 1st order MMF harmonic. Additionally, these methods increase the amplitude of the torque producing harmonic and so yield a machine with better torque performance than a conventional 3-phase machine. Analytical modelling is used to demonstrate the cumulative impact on winding MMF harmonics. FEA is then used to validate the analytical predictions and to investigate other machine performance. The proposed machine demonstrates comparable average torque and efficiency to a 12-slot dual 3-phase machine, but offers a substantial reduction in torque ripple and PM eddy current losses. This helps improve the machine performance and reduce the risk of thermal demagnetization. A prototype machine has been manufactured and EMF and static torque measurements validate the expected performance of the proposed machine.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 The Authors. Except as otherwise noted, this author-accepted version of a journal article published in IEEE Transactions on Energy Conversion is made available via the University of Sheffield Research Publications and Copyright Policy under the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ |
Keywords: | Dual 3-phase; fractional-slot concentrated windings; star-delta; stator shifting |
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) |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/R004900/1 SIEMENS PUBLIC LIMITED COMPANY UNSPECIFIED |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 11 Jul 2023 09:09 |
Last Modified: | 04 Oct 2024 11:55 |
Status: | Published |
Publisher: | Institute of Electrical and Electronics Engineers |
Refereed: | Yes |
Identification Number: | 10.1109/TEC.2023.3292406 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:201070 |
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Filename: 2023-06-29-SpaceHarmonicCancellation-Review-final.pdf
Licence: CC-BY 4.0