Analytical model for effects of twisting on litz-wire losses

Charles R. Sullivan, Richard Yi Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Litz wire uses complex twisting to balance currents between strands. Most models assume that the twisting works perfectly to accomplish this balancing, and thus are not helpful in choosing the details of the twisting configuration. A complete model that explicitly models the effect of twisting on loss is introduced. Skin effect and proximity effect are each modeled at the level of the individual strands and at each level of the twisting construction. Comparisons with numerical simulations are used to verify the model. The results are useful for making design choices for the twisting configuration and the pitches of each twisting step. Windings with small numbers of turns are the most likely to have significant bundle-level effects that are not captured by conventional models, and are the most important to model and optimize with this approach.

Original languageEnglish (US)
Title of host publication2014 IEEE 15th Workshop on Control and Modeling for Power Electronics, COMPEL 2014
PublisherIEEE Computer Society
ISBN (Print)9781479921478
DOIs
StatePublished - Jan 1 2014
Externally publishedYes
Event2014 IEEE 15th Workshop on Control and Modeling for Power Electronics, COMPEL 2014 - Santander, Spain
Duration: Jun 22 2014Jun 25 2014

Publication series

Name2014 IEEE 15th Workshop on Control and Modeling for Power Electronics, COMPEL 2014

Other

Other2014 IEEE 15th Workshop on Control and Modeling for Power Electronics, COMPEL 2014
CountrySpain
CitySantander
Period6/22/146/25/14

Keywords

  • analytical model
  • twisting effects
  • litz-wire losses
  • skin effect
  • proximity effect
  • twisting construction
  • numerical simulations
  • windings
  • bundle-level effects

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Modeling and Simulation

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  • Cite this

    Sullivan, C. R., & Zhang, R. Y. (2014). Analytical model for effects of twisting on litz-wire losses. In 2014 IEEE 15th Workshop on Control and Modeling for Power Electronics, COMPEL 2014 [6877187] (2014 IEEE 15th Workshop on Control and Modeling for Power Electronics, COMPEL 2014). IEEE Computer Society. https://doi.org/10.1109/COMPEL.2014.6877187