Field-cannon-technique to Reduce AC Resistance of Foil Windings in High Frequency Transformers

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Minimizing transformer winding loss is a prominent factor to increase efficiency of power electronics converters. This is especially valid for modern switched-mode power supplies, where eddy current effects on windings become dominant due to continuously elevated switching frequency. In this paper, a field shaping technique, dubbed the field-cannon-technique, is proposed to mitigate eddy current effects in high frequency transformers’ foil windings. The basic principle and the implementation of the proposed technique is introduced. A model is derived using finite difference method, in order to calculate the distribution of the magnetic field within the transformers implemented with the field-cannon-technique. Finally, the technique is verified by experiments, where the winding resistance of the transformer is reduced by a factor of three.
Original languageEnglish
Title of host publicationProceedings of IEEE 9th International Power Electronics and Motion Control Conference
PublisherIEEE
Pages1063-1068
Publication statusAccepted/In press - 2021
Event2020 IEEE 9th International Power Electronics and Motion Control Conference - International Youth Cultural Centre, Nanjing, China
Duration: 29 Nov 20202 Dec 2020

Conference

Conference2020 IEEE 9th International Power Electronics and Motion Control Conference
LocationInternational Youth Cultural Centre
CountryChina
CityNanjing
Period29/11/202002/12/2020

Keywords

  • Eddy current
  • High frequency
  • Transformers
  • Magnetic field shaping

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