A novel three-phase LLC resonant converter with integrated magnetics for lower turn-off losses and higher power density

Mostafa Noah, Shota Kimura, Shun Endo, Masayoshi Yamamoto, Jun Imaoka, Kazuhiro Umetani, Wilmar Martinez

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

17 Citations (Scopus)

Abstract

The aim of this work is to present a novel topology of a three-phase LLC converter with integrated magnetics. The converter operation and the comprehensive theoretical analysis are presented; this analysis follows the first harmonic approximation (FHA) approach to simplify the system model. Usually, LLC converter achieves zero voltage switching (ZVS) as long as it working in the inductive region. Therefore, the turn off losses are considered as the main source of the switching losses in the converter. In this paper the design in optimized to minimize the switching losses. On the other hand, adapting three discrete transformer cores in this topology will definitely increase the size and volume of the converter. As a result, a novel magnetic integration concept is introduced where all magnetic components of the three-phases are advantageously combined into a single magnetic core to increase the converter power density. Finally, the experimental results are presented to verify the optimized design by showing a reduction in the turn-off losses and the effectiveness of adapting the proposed integrated transformer, in which an increment of 56% in the power density of the converter could be attained.

Original languageEnglish
Title of host publication2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages322-329
Number of pages8
ISBN (Electronic)9781509053667
DOIs
Publication statusPublished - May 17 2017
Event32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017 - Tampa, United States
Duration: Mar 26 2017Mar 30 2017

Other

Other32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017
CountryUnited States
CityTampa
Period3/26/173/30/17

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Keywords

  • Integrated magnetics
  • Optimization
  • Steady state analysis
  • Three phase LLC resonant converter

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Noah, M., Kimura, S., Endo, S., Yamamoto, M., Imaoka, J., Umetani, K., & Martinez, W. (2017). A novel three-phase LLC resonant converter with integrated magnetics for lower turn-off losses and higher power density. In 2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017 (pp. 322-329). [7930712] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APEC.2017.7930712