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

doi:10.1109/PESA50370.2020.9343991

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 proceeding › Conference article published in proceeding or book › Academic research › peer-review

3 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 language	English
Title of host publication	2020 8th International Conference on Power Electronics Systems and Applications
Subtitle of host publication	Future Mobility and Future Power Transfer, PESA 2020
Editors	K.W. Eric Cheng
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781728193823
DOIs	https://doi.org/10.1109/PESA50370.2020.9343991
Publication status	Published - 7 Dec 2020
Event	8th International Conference on Power Electronics Systems and Applications, PESA 2020 - Hong Kong, China Duration: 7 Dec 2020 → 10 Dec 2020

Publication series

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

Conference

Conference	8th International Conference on Power Electronics Systems and Applications, PESA 2020
Country/Territory	China
City	Hong Kong
Period	7/12/20 → 10/12/20

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

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

More information

10.1109/PESA50370.2020.9343991

Cite this

Tsang, H. K. T., Fong, Y. C., Kan, K. L. J., Raman, S. R., & Cheng, K. W. E. (2020). A study of LLC converter with buck converter for CC-CV charging. In K. W. E. Cheng (Ed.), 2020 8th International Conference on Power Electronics Systems and Applications: Future Mobility and Future Power Transfer, PESA 2020 Article 9343991 (2020 8th International Conference on Power Electronics Systems and Applications: Future Mobility and Future Power Transfer, PESA 2020). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PESA50370.2020.9343991

Tsang, H. K.T. ; Fong, Y. C. ; Kan, Kin Lung Jerry et al. / A study of LLC converter with buck converter for CC-CV charging. 2020 8th International Conference on Power Electronics Systems and Applications: Future Mobility and Future Power Transfer, PESA 2020. editor / K.W. Eric Cheng. Institute of Electrical and Electronics Engineers Inc., 2020. (2020 8th International Conference on Power Electronics Systems and Applications: Future Mobility and Future Power Transfer, PESA 2020).

@inproceedings{033ab0022072410195d2365e9f71df0e,

title = "A study of LLC converter with buck converter for CC-CV charging",

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.",

keywords = "Buck converter, CC-CV battery charging, Closed-loop control, LLC converter",

author = "Tsang, \{H. K.T.\} and Fong, \{Y. C.\} and Kan, \{Kin Lung Jerry\} and Raman, \{S. Raghu\} and Cheng, \{K. W.E.\}",

note = "Publisher Copyright: {\textcopyright} 2020 IEEE.; 8th International Conference on Power Electronics Systems and Applications, PESA 2020 ; Conference date: 07-12-2020 Through 10-12-2020",

year = "2020",

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doi = "10.1109/PESA50370.2020.9343991",

language = "English",

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

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booktitle = "2020 8th International Conference on Power Electronics Systems and Applications",

}

Tsang, HKT, Fong, YC, Kan, KLJ, Raman, SR & Cheng, KWE 2020, A study of LLC converter with buck converter for CC-CV charging. in KWE Cheng (ed.), 2020 8th International Conference on Power Electronics Systems and Applications: Future Mobility and Future Power Transfer, PESA 2020., 9343991, 2020 8th International Conference on Power Electronics Systems and Applications: Future Mobility and Future Power Transfer, PESA 2020, Institute of Electrical and Electronics Engineers Inc., 8th International Conference on Power Electronics Systems and Applications, PESA 2020, Hong Kong, China, 7/12/20. https://doi.org/10.1109/PESA50370.2020.9343991

A study of LLC converter with buck converter for CC-CV charging. / Tsang, H. K.T.; Fong, Y. C.; Kan, Kin Lung Jerry et al.
2020 8th International Conference on Power Electronics Systems and Applications: Future Mobility and Future Power Transfer, PESA 2020. ed. / K.W. Eric Cheng. Institute of Electrical and Electronics Engineers Inc., 2020. 9343991 (2020 8th International Conference on Power Electronics Systems and Applications: Future Mobility and Future Power Transfer, PESA 2020).

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

TY - GEN

T1 - A study of LLC converter with buck converter for CC-CV charging

AU - Tsang, H. K.T.

AU - Fong, Y. C.

AU - Kan, Kin Lung Jerry

AU - Raman, S. Raghu

AU - Cheng, K. W.E.

PY - 2020/12/7

Y1 - 2020/12/7

N2 - 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.

AB - 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.

KW - Buck converter

KW - CC-CV battery charging

KW - Closed-loop control

KW - LLC converter

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M3 - Conference article published in proceeding or book

AN - SCOPUS:85101330103

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PB - Institute of Electrical and Electronics Engineers Inc.

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Y2 - 7 December 2020 through 10 December 2020

ER -

Tsang HKT, Fong YC, Kan KLJ, Raman SR, Cheng KWE. A study of LLC converter with buck converter for CC-CV charging. In Cheng KWE, editor, 2020 8th International Conference on Power Electronics Systems and Applications: Future Mobility and Future Power Transfer, PESA 2020. Institute of Electrical and Electronics Engineers Inc. 2020. 9343991. (2020 8th International Conference on Power Electronics Systems and Applications: Future Mobility and Future Power Transfer, PESA 2020). doi: 10.1109/PESA50370.2020.9343991

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

Abstract

Publication series

Conference

UN SDGs

Keywords

ASJC Scopus subject areas

More information

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