Segmented Hairpin Topology for Reduced Losses at High-Frequency Operations
Nowadays, one of the key challenges in transport electrification is the reduction of components’ size and weight. The electrical machine plays a relevant role in this regard. Designing machines with higher rotational speeds and excitation frequencies is one of the most effective solutions to increase power densities, but this comes at the cost of increased losses in cores and windings. This challenge is even more pronounced in preformed windings, such as hairpins, which enable higher slot fill factors and shorten manufacturing cycle times. In this work, an improved hairpin winding concept is proposed, aiming to minimize high-frequency losses while maintaining the benefits deriving from the implementation of hairpin windings onto electrical machines. Analytical and finite element models are first used to assess the high-frequency losses in the proposed winding concept, namely the segmented hairpin, proving the benefits compared to conventional layouts. Experimental tests are also performed on a number of motorettes comprising both conventional and proposed segmented hairpin configurations. Finally, these experimental results are compared against those collected from motorettes equipped with random windings, demonstrating the competitiveness of the segmented hairpin layout even at high-frequency operations.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/23327782
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Supplemental Notes:
- Copyright © 2022, IEEE.
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Authors:
- Preci, Eraldo
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0000-0001-6099-4084
- Nuzzo, Stefano
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0000-0001-9998-5644
- Valente, Giorgio
- Gerada, David
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0000-0002-8280-1308
- Barater, Davide
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0000-0002-4862-4504
- Degano, Michele
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0000-0002-9689-1172
- Buticchi, Giampaolo
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0000-0003-0470-3259
- Gerada, Chris
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0000-0003-4707-4480
- Publication Date: 2022-3
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: pp 688-698
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Serial:
- IEEE Transactions on Transportation Electrification
- Volume: 8
- Issue Number: 1
- Publisher: Institute of Electrical and Electronics Engineers (IEEE)
- ISSN: 2332-7782
- Serial URL: http://ieeexplore.ieee.org/servlet/opac?punumber=6687316
Subject/Index Terms
- TRT Terms: Finite element method; High frequency; Mathematical models; Motors; Power loss; Topology
- Subject Areas: Energy; Highways; Vehicles and Equipment;
Filing Info
- Accession Number: 01845760
- Record Type: Publication
- Files: TRIS
- Created Date: May 19 2022 10:41AM