Capacitive current balancing for parallel-connected LED strings with tight load-regulation by switch-controlled capacitor

C. S. Wong; Ka Hong Loo; Y. M. Lai; Chi Kong Tse

doi:10.1109/EPE.2016.7695394

Capacitive current balancing for parallel-connected LED strings with tight load-regulation by switch-controlled capacitor

C. S. Wong
, Ka Hong Loo
, Y. M. Lai
, Chi Kong Tse

The Hong Kong Polytechnic University

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

1 Citation (Scopus)

Abstract

This paper proposes a capacitive current balancing method for multistring LED lighting system driven by a LCC resonant converter. Different from conventional current balancing methods, this method replaces the capacitor in the resonant tank by a switch-controlled capacitor (SCC) with which the output voltage can be regulated by modulating the frequency of the resonant tank instead of the switching frequency of the converter. As a result, LED currents can be balanced and maintained to a desired value even for wide load and input voltage variations. A 70-W LCC resonant converter is built to validate the method.

Original language	English
Title of host publication	2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe
Publisher	IEEE
ISBN (Electronic)	9789075815245
DOIs	https://doi.org/10.1109/EPE.2016.7695394
Publication status	Published - 25 Oct 2016
Event	18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe - Karlsruhe, Germany Duration: 5 Sept 2016 → 9 Sept 2016

Conference

Conference	18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe
Country/Territory	Germany
City	Karlsruhe
Period	5/09/16 → 9/09/16

Keywords

Converter control
Lighting
Power supply
Resonant converter

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering

More information

10.1109/EPE.2016.7695394

Cite this

@inproceedings{611fee0cb0844a92965187fc3ed97cda,

title = "Capacitive current balancing for parallel-connected LED strings with tight load-regulation by switch-controlled capacitor",

abstract = "This paper proposes a capacitive current balancing method for multistring LED lighting system driven by a LCC resonant converter. Different from conventional current balancing methods, this method replaces the capacitor in the resonant tank by a switch-controlled capacitor (SCC) with which the output voltage can be regulated by modulating the frequency of the resonant tank instead of the switching frequency of the converter. As a result, LED currents can be balanced and maintained to a desired value even for wide load and input voltage variations. A 70-W LCC resonant converter is built to validate the method.",

keywords = "Converter control, Lighting, Power supply, Resonant converter",

author = "Wong, \{C. S.\} and Loo, \{Ka Hong\} and Lai, \{Y. M.\} and Tse, \{Chi Kong\}",

year = "2016",

month = oct,

day = "25",

doi = "10.1109/EPE.2016.7695394",

language = "English",

booktitle = "2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe",

publisher = "IEEE",

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note = "18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe ; Conference date: 05-09-2016 Through 09-09-2016",

}

Wong, CS, Loo, KH, Lai, YM & Tse, CK 2016, Capacitive current balancing for parallel-connected LED strings with tight load-regulation by switch-controlled capacitor. in 2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe., 7695394, IEEE, 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe, Karlsruhe, Germany, 5/09/16. https://doi.org/10.1109/EPE.2016.7695394

Capacitive current balancing for parallel-connected LED strings with tight load-regulation by switch-controlled capacitor. / Wong, C. S.; Loo, Ka Hong; Lai, Y. M. et al.
2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe. IEEE, 2016. 7695394.

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

TY - GEN

T1 - Capacitive current balancing for parallel-connected LED strings with tight load-regulation by switch-controlled capacitor

AU - Wong, C. S.

AU - Loo, Ka Hong

AU - Lai, Y. M.

AU - Tse, Chi Kong

PY - 2016/10/25

Y1 - 2016/10/25

N2 - This paper proposes a capacitive current balancing method for multistring LED lighting system driven by a LCC resonant converter. Different from conventional current balancing methods, this method replaces the capacitor in the resonant tank by a switch-controlled capacitor (SCC) with which the output voltage can be regulated by modulating the frequency of the resonant tank instead of the switching frequency of the converter. As a result, LED currents can be balanced and maintained to a desired value even for wide load and input voltage variations. A 70-W LCC resonant converter is built to validate the method.

AB - This paper proposes a capacitive current balancing method for multistring LED lighting system driven by a LCC resonant converter. Different from conventional current balancing methods, this method replaces the capacitor in the resonant tank by a switch-controlled capacitor (SCC) with which the output voltage can be regulated by modulating the frequency of the resonant tank instead of the switching frequency of the converter. As a result, LED currents can be balanced and maintained to a desired value even for wide load and input voltage variations. A 70-W LCC resonant converter is built to validate the method.

KW - Converter control

KW - Lighting

KW - Power supply

KW - Resonant converter

UR - https://www.scopus.com/pages/publications/84996605663

U2 - 10.1109/EPE.2016.7695394

DO - 10.1109/EPE.2016.7695394

M3 - Conference article published in proceeding or book

BT - 2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe

PB - IEEE

T2 - 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe

Y2 - 5 September 2016 through 9 September 2016

ER -

Capacitive current balancing for parallel-connected LED strings with tight load-regulation by switch-controlled capacitor

Abstract

Conference

Keywords

ASJC Scopus subject areas

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