Equivalent thermal conductivity prediction of form-wound windings with litz wire considering transposition effect

Xuan Yi, Xiaojian Qiao, Tianyu Yang, Kiruba S. Haran, Nenad Miljkovic

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

Abstract

Litz wire has been widely used in high-frequency electrical machines and transformers to minimize induced current loss and maintain high efficiency. Its heat dissipation capability can be a key design factor for high-power-density electrical machine and power electronics. Although litz wire equivalent thermal conductivity has been studied, its transposition effect is usually ignored. This paper focus on developing an analytical model to predict litz wire equivalent thermal conductivity considering its bundle transposition effects. A 3-D litz wire is modeled and simulated to validate analytical results. Also, transposed and parallel arrangement effects on litz wire equivalent thermal conductivity are compared and discussed. Hardware experiments are used to validate the analytical results in the end. The predictions of using the proposed analytical model match up well with both simulation and experimental results.

Original languageEnglish (US)
Title of host publication2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2048-2055
Number of pages8
ISBN (Electronic)9781538693490
DOIs
StatePublished - May 2019
Event11th IEEE International Electric Machines and Drives Conference, IEMDC 2019 - San Diego, United States
Duration: May 12 2019May 15 2019

Publication series

Name2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019

Conference

Conference11th IEEE International Electric Machines and Drives Conference, IEMDC 2019
CountryUnited States
CitySan Diego
Period5/12/195/15/19

Keywords

  • Composite
  • Electrical machine
  • Litz wire
  • Thermal conductivity

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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  • Cite this

    Yi, X., Qiao, X., Yang, T., Haran, K. S., & Miljkovic, N. (2019). Equivalent thermal conductivity prediction of form-wound windings with litz wire considering transposition effect. In 2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019 (pp. 2048-2055). [8785368] (2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IEMDC.2019.8785368