A study of LLC converter with buck converter for CC-CV charging

H. K.T. Tsang, Y. C. Fong, Kin Lung Jerry Kan, S. Raghu Raman, K. W.E. Cheng

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)

Abstract

For having switching frequency equal to resonant tank frequency in LLC converter, a unity voltage gain can be achieved over the entire loading conditions but it is not suitable for the Constant Current-Constant Voltage (CC-CV) battery application. Also, the voltage gain characteristic of LLC converter is frequency dependent. For battery charging application, a wide range of switching frequency is required for supplying constant current, charging the battery with its varying load characteristic. It causes above and below resonant frequency operation which causes losses and noise. As result, it is proposed to make use of a buck converter at the output of LLC converter for regulating the charging current and voltage for battery charging application.

Original languageEnglish
Title of host publication2020 8th International Conference on Power Electronics Systems and Applications
Subtitle of host publicationFuture Mobility and Future Power Transfer, PESA 2020
EditorsK.W. Eric Cheng
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728193823
DOIs
Publication statusPublished - 7 Dec 2020
Event8th International Conference on Power Electronics Systems and Applications, PESA 2020 - Hong Kong, China
Duration: 7 Dec 202010 Dec 2020

Publication series

Name2020 8th International Conference on Power Electronics Systems and Applications: Future Mobility and Future Power Transfer, PESA 2020

Conference

Conference8th International Conference on Power Electronics Systems and Applications, PESA 2020
Country/TerritoryChina
CityHong Kong
Period7/12/2010/12/20

Keywords

  • Buck converter
  • CC-CV battery charging
  • Closed-loop control
  • LLC converter

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Automotive Engineering

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