Current source ballast for high power lighting emitting diodes without electrolytic capacitor

Y. X. Qin; Henry S. H. Chung; D. Y. Lin; S. Y R Hui

doi:10.1109/IECON.2008.4758258

Current source ballast for high power lighting emitting diodes without electrolytic capacitor

Y. X. Qin
, Henry S. H. Chung
, D. Y. Lin
, S. Y R Hui

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

118 Citations (Scopus)

Abstract

An LED driver requiring no electrolytic capacitor in the whole power conversion process is presented. It consists of two power conversion stages. The first stage is a buck converter operating in discontinuous capacitor voltage mode, so that the input current is continuous. It is used to deliver a regulated current for the second stage. The second stage is a current-fed inverter, in which the semiconductor switches are operated at constant switching frequency and constant duty cycle of 0.5. The power supplying to the LED string is regulated by controlling the duty cycle of the main switch in the front-stage buck converter. The two stages are interconnected by an LC filter, which is designed to attenuate harmonics at double of the line frequency. Instead of using an electrolytic capacitor for the filter, a polyester capacitor of better lifetime expectancy is used. An 18W experimental prototype has been built and tested. © 2008 IEEE.

Original language	English
Title of host publication	Proceedings - 34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008
Pages	1968-1973
DOIs	https://doi.org/10.1109/IECON.2008.4758258
Publication status	Published - 2008
Event	34th Annual Conference of the IEEE Industrial Electronics Society (IECON 2008) - Florida Hotel & Conference Center, Orlando, United States Duration: 10 Nov 2008 → 13 Nov 2008 https://www.proceedings.com/content/004/004590webtoc.pdf

Conference

Conference	34th Annual Conference of the IEEE Industrial Electronics Society (IECON 2008)
Place	United States
City	Orlando
Period	10/11/08 → 13/11/08
Internet address	https://www.proceedings.com/content/004/004590webtoc.pdf

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10.1109/IECON.2008.4758258

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@inproceedings{d7fec764e5cd485382c1819c8a33c8eb,

title = "Current source ballast for high power lighting emitting diodes without electrolytic capacitor",

abstract = "An LED driver requiring no electrolytic capacitor in the whole power conversion process is presented. It consists of two power conversion stages. The first stage is a buck converter operating in discontinuous capacitor voltage mode, so that the input current is continuous. It is used to deliver a regulated current for the second stage. The second stage is a current-fed inverter, in which the semiconductor switches are operated at constant switching frequency and constant duty cycle of 0.5. The power supplying to the LED string is regulated by controlling the duty cycle of the main switch in the front-stage buck converter. The two stages are interconnected by an LC filter, which is designed to attenuate harmonics at double of the line frequency. Instead of using an electrolytic capacitor for the filter, a polyester capacitor of better lifetime expectancy is used. An 18W experimental prototype has been built and tested. {\textcopyright} 2008 IEEE.",

author = "Qin, \{Y. X.\} and Chung, \{Henry S. H.\} and Lin, \{D. Y.\} and Hui, \{S. Y R\}",

year = "2008",

doi = "10.1109/IECON.2008.4758258",

language = "English",

isbn = "9781424417667",

pages = "1968--1973",

booktitle = "Proceedings - 34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008",

note = "34th Annual Conference of the IEEE Industrial Electronics Society (IECON 2008) ; Conference date: 10-11-2008 Through 13-11-2008",

url = "https://www.proceedings.com/content/004/004590webtoc.pdf",

}

Qin, YX, Chung, HSH, Lin, DY & Hui, SYR 2008, Current source ballast for high power lighting emitting diodes without electrolytic capacitor. in Proceedings - 34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008., 4758258, pp. 1968-1973, 34th Annual Conference of the IEEE Industrial Electronics Society (IECON 2008), Orlando, Florida, United States, 10/11/08. https://doi.org/10.1109/IECON.2008.4758258

Current source ballast for high power lighting emitting diodes without electrolytic capacitor. / Qin, Y. X.; Chung, Henry S. H.; Lin, D. Y. et al.
Proceedings - 34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008. 2008. p. 1968-1973 4758258.

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - Current source ballast for high power lighting emitting diodes without electrolytic capacitor

AU - Qin, Y. X.

AU - Chung, Henry S. H.

AU - Lin, D. Y.

AU - Hui, S. Y R

PY - 2008

Y1 - 2008

N2 - An LED driver requiring no electrolytic capacitor in the whole power conversion process is presented. It consists of two power conversion stages. The first stage is a buck converter operating in discontinuous capacitor voltage mode, so that the input current is continuous. It is used to deliver a regulated current for the second stage. The second stage is a current-fed inverter, in which the semiconductor switches are operated at constant switching frequency and constant duty cycle of 0.5. The power supplying to the LED string is regulated by controlling the duty cycle of the main switch in the front-stage buck converter. The two stages are interconnected by an LC filter, which is designed to attenuate harmonics at double of the line frequency. Instead of using an electrolytic capacitor for the filter, a polyester capacitor of better lifetime expectancy is used. An 18W experimental prototype has been built and tested. © 2008 IEEE.

AB - An LED driver requiring no electrolytic capacitor in the whole power conversion process is presented. It consists of two power conversion stages. The first stage is a buck converter operating in discontinuous capacitor voltage mode, so that the input current is continuous. It is used to deliver a regulated current for the second stage. The second stage is a current-fed inverter, in which the semiconductor switches are operated at constant switching frequency and constant duty cycle of 0.5. The power supplying to the LED string is regulated by controlling the duty cycle of the main switch in the front-stage buck converter. The two stages are interconnected by an LC filter, which is designed to attenuate harmonics at double of the line frequency. Instead of using an electrolytic capacitor for the filter, a polyester capacitor of better lifetime expectancy is used. An 18W experimental prototype has been built and tested. © 2008 IEEE.

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DO - 10.1109/IECON.2008.4758258

M3 - RGC 32 - Refereed conference paper (with host publication)

SN - 9781424417667

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EP - 1973

BT - Proceedings - 34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008

T2 - 34th Annual Conference of the IEEE Industrial Electronics Society (IECON 2008)

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ER -

Current source ballast for high power lighting emitting diodes without electrolytic capacitor

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