Hairpin Windings for Electric Vehicle Motors: Modeling and Investigation of AC Loss-Mitigating Approaches

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorGhahfarokhi, Payam Shams
dc.contributor.authorPodgornovs, Andrejs
dc.contributor.authorCardoso, Antonio J. Marques
dc.contributor.authorKallaste, Ants
dc.contributor.authorBelahcen, Anouar
dc.contributor.authorVaimann, Toomas
dc.contributor.departmentUniversidade da Beira Interior
dc.contributor.departmentRiga Technical University
dc.contributor.departmentTallinn University of Technology
dc.contributor.departmentDepartment of Electrical Engineering and Automation
dc.contributor.departmentDepartment of Electrical Engineering and Automationen
dc.date.accessioned2023-01-18T09:25:57Z
dc.date.available2023-01-18T09:25:57Z
dc.date.issued2022-11
dc.description.abstractThe hairpin winding configuration has been attracting attention as a solution to increase the power density of electric vehicle motors by enhancing the slot-filling factor. However, this winding configuration brings high AC losses during high-speed operation and we require new approaches to tackle this challenge. This paper considers reducing AC losses by proposing two main methods: correct transposition of conductors in parallel paths, and enhancing the number of conductor layers in a slot. First, the proper connection of conductors in parallel paths is considered, and the essential rules for this purpose are described. Next, the paper uses a numerical approach to deal with the effect of incorrect conductor transposition in winding paths on generating additional AC losses due to circulating currents. Finally, the impact of the number of conductor layers in the mitigation of AC losses is also discussed in detail. According to the results, by increasing the number of layers, ohmic losses in the layer near the slot opening dramatically decrease. For instance, ohmic losses in the layer near the slot opening of the eight-layer setup were 82% less than the two-layer layout.en
dc.description.versionPeer revieweden
dc.format.extent14
dc.format.mimetypeapplication/pdf
dc.identifier.citationGhahfarokhi , P S , Podgornovs , A , Cardoso , A J M , Kallaste , A , Belahcen , A & Vaimann , T 2022 , ' Hairpin Windings for Electric Vehicle Motors: Modeling and Investigation of AC Loss-Mitigating Approaches ' , Machines , vol. 10 , no. 11 , 1029 . https://doi.org/10.3390/machines10111029en
dc.identifier.doi10.3390/machines10111029
dc.identifier.issn2075-1702
dc.identifier.otherPURE UUID: 9cce3e7b-9cb1-4db1-b98a-2a33eadf2559
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/9cce3e7b-9cb1-4db1-b98a-2a33eadf2559
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/97753046/machines_10_01029_v2.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/118923
dc.identifier.urnURN:NBN:fi:aalto-202301181279
dc.language.isoenen
dc.publisherMDPI AG
dc.relation.ispartofseriesMachinesen
dc.relation.ispartofseriesVolume 10, issue 11en
dc.rightsopenAccessen
dc.subject.keywordAC losses
dc.subject.keywordAC motors
dc.subject.keywordanalytical modeling
dc.subject.keywordelectromagnetic modeling
dc.subject.keywordelectric vehicle
dc.subject.keywordhairpins
dc.subject.keywordnumerical modeling
dc.titleHairpin Windings for Electric Vehicle Motors: Modeling and Investigation of AC Loss-Mitigating Approachesen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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