Comparative Analysis of AC losses with round magnet wire and Litz wire winding of a High - Speed PM Machine

Anuvav Bardalai, Xiaochen Zhang, Tianjie Zou, David Gerada, Jing Li, Chris Gerada

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

12 Citations (Scopus)

Abstract

The growing trend of high speed, high power density machines for applications such as EVs, aerospace and machine tools demand these machines to work at higher electrical frequencies. Meanwhile, increasing the fundamental frequency leads to pronounced parasitic effects such as skin and proximity effects, which could induce considerable circulating current in stator windings. The additional winding loss due to these effects has generally made copper loss the dominant part of overall power loss in a high speed, high power density machine. This paper presents an in-depth investigation into the losses in the winding of a high-speed PM machine based on numerical FEA and compares the losses. Through loss comparison of various winding topologies using straight magnet wires along with Litz wire at high frequencies, it is found that transposition between coil turns which belong to the upper and lower coil sides can significantly reduce the AC copper loss.

Original languageEnglish
Title of host publication2019 22nd International Conference on Electrical Machines and Systems, ICEMS 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728133980
DOIs
Publication statusPublished - Aug 2019
Event22nd International Conference on Electrical Machines and Systems, ICEMS 2019 - Harbin, China
Duration: 11 Aug 201914 Aug 2019

Publication series

Name2019 22nd International Conference on Electrical Machines and Systems, ICEMS 2019

Conference

Conference22nd International Conference on Electrical Machines and Systems, ICEMS 2019
Country/TerritoryChina
CityHarbin
Period11/08/1914/08/19

Keywords

  • AC losses
  • Aerospace
  • circulating currents
  • conductors
  • electric transportation
  • high power density
  • permanent magnet
  • proximity effect
  • windings

ASJC Scopus subject areas

  • Control and Optimization
  • Energy Engineering and Power Technology
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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