Reduction of Winding AC Losses by Accurate Conductor Placement in High Frequency Electrical Machines

Anuvav Bardalai, David Gerada, Dmitry Golovanov, Zeyuan Xu, Xiaochen Zhang, Jing Li, He Zhang, Chris Gerada

Research output: Journal PublicationArticlepeer-review

48 Citations (Scopus)


In the design of electrical machines, the increase in power density has become one of the main research themes. With most of the power loss in high power density electrical machines often being generated in the stator winding assembly, it is necessary to reduce these losses. The effects of strands and bundle positions in the slot on the ac losses in the winding are often overlooked. Taking as a case-study an existing high-frequency machine, this article analyzes and provides an in-depth insight into such effects. Exploiting the rapid advancements in precision three-dimensional printing, it is found and experimentally verified that by controlling the position of the conductors within the top of the slot the ac losses can be markedly reduced.

Original languageEnglish
Article number8869801
Pages (from-to)183-193
Number of pages11
JournalIEEE Transactions on Industry Applications
Issue number1
Publication statusPublished - 1 Jan 2020


  • AC copper loss
  • circulating currents
  • conductors
  • eddy current
  • high power density
  • optimization
  • permanent magnet machines
  • proximity effect
  • transportation
  • windings

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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