An analytical approach for the design of innovative hairpin winding layouts

A. Arzillo, S. Nuzzo, P. Braglia, G. Franceschini, D. Barater, D. Gerada, C. Gerada

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

17 Citations (Scopus)

Abstract

This work deals with an analytical approach aimed at accurately predicting Joule losses in innovative hairpin winding layouts. While hairpin windings are seeing an everincreasing use in automotive and aerospace applications due to their inherently high slot fill factor, they also present drawbacks such as the non-uniform current distribution potentially occurring across their cross section. This phenomenon is emphasized at high frequencies, leading to a significant increase of the effective conductor resistance and, consequently, of copper losses. Hence, particular attention has to be given to the design of electrical machines employing hairpin conductors, aiming to reduce the high-frequency losses as much as possible. In this paper, an analytical model based on previous investigations is updated and modified in order to increase the degrees of freedom in the design and analysis of hairpin windings. With the developed analytical model, the copper losses associated to innovative hairpin configurations can be accurately predicted. The findings also confirm that such alternative layouts can effectively reduce the Joule losses when compared to traditional hairpin technologies.

Original languageEnglish
Title of host publicationProceedings - 2020 International Conference on Electrical Machines, ICEM 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1534-1539
Number of pages6
ISBN (Electronic)9781728199450
DOIs
Publication statusPublished - 23 Aug 2020
Externally publishedYes
Event2020 International Conference on Electrical Machines, ICEM 2020 - Virtual, Gothenburg, Sweden
Duration: 23 Aug 202026 Aug 2020

Publication series

NameProceedings - 2020 International Conference on Electrical Machines, ICEM 2020

Conference

Conference2020 International Conference on Electrical Machines, ICEM 2020
Country/TerritorySweden
CityVirtual, Gothenburg
Period23/08/2026/08/20

Keywords

  • AC losses
  • Analytical model
  • Asymmetric windings
  • Hairpin
  • High-speed motors
  • Segmented windings

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

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