ID | 64329 |
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Author |
Tao, Xianji
Graduate School of Information and Technology, Hokkaido University
Takemoto, Masatsugu
Graduate School of Natural Science and Technology, Okayama University
ORCID
Kaken ID
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Tsunata, Ren
Graduate School of Natural Science and Technology, Okayama University
Ogasawara, Satoshi
Graduate School of Information and Technology, Hokkaido University
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Abstract | A special rectangular winding structure, which has different cross-sectional shape but the same cross-sectional area for each turn, has been adopted in a high-torque IPMSM used for a wind generator to improve slot factor and heat dissipation. However, large eddy current loss occurs to the rectangular windings. According to this problem, this paper proposes three improvements to reduce the eddy current loss. Among them, removing a portion of windings and replacing a portion of windings with aluminum are discussed to realize a tradeoff between eddy current and copper losses. And adjusting the tooth-tip shape is discussed to suppress the magnetic flux passing through the windings by mitigating magnetic saturation around the tooth-tip. Additionally, manufacturing costs can also be reduced by adopting a portion of aluminum windings. Moreover, a 3-step-skewed rotor structure is discussed to reduce cogging torque and lower the start-up wind speed. And its influence on losses is also discussed. Furthermore, three models adopting round windings are made and discussed for comparison. The FEM (Finite Element Method) results show that compared with the three round windings models, the proposed model still has a better performance in the reduction of windings eddy current loss. Finally, a prototype machine is manufactured to verify the FEM results, and the experimental results show that the maximum efficiency of the prototype can exceed 97.5%.
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Keywords | IPMSM
IPMSG
high-torque
concentrated windings
rectangular windings
eddy current loss
wind generator
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Published Date | 2023-01-11
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Publication Title |
IEEE Access
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Volume | volume11
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Publisher | IEEE
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Start Page | 4740
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End Page | 4751
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ISSN | 2169-3536
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Content Type |
Journal Article
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language |
English
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OAI-PMH Set |
岡山大学
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File Version | publisher
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DOI | |
Related Url | isVersionOf https://doi.org/10.1109/ACCESS.2023.3236105
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License | https://creativecommons.org/licenses/by/4.0/
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