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

TitleCurrent source ballast for high power lighting emitting diodes without electrolytic capacitor
Authors
Qin, YXChung, HSHLin, DYHui, SYR
Issue Date2008
Citation
Proceedings - 34Th Annual Conference Of The Ieee Industrial Electronics Society, Iecon 2008, 2008, p. 1968-1973 How to Cite?
DOI: http://dx.doi.org/10.1109/IECON.2008.4758258
AbstractAn 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.
Persistent Identifierhttp://hdl.handle.net/10722/158580
References
References in Scopus

 

DC FieldValueLanguage
dc.contributor.authorQin, YXen_US
dc.contributor.authorChung, HSHen_US
dc.contributor.authorLin, DYen_US
dc.contributor.authorHui, SYRen_US
dc.date.accessioned2012-08-08T09:00:20Z-
dc.date.available2012-08-08T09:00:20Z-
dc.date.issued2008en_US
dc.identifier.citationProceedings - 34Th Annual Conference Of The Ieee Industrial Electronics Society, Iecon 2008, 2008, p. 1968-1973en_US
dc.identifier.urihttp://hdl.handle.net/10722/158580-
dc.description.abstractAn 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.en_US
dc.languageengen_US
dc.relation.ispartofProceedings - 34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008en_US
dc.titleCurrent source ballast for high power lighting emitting diodes without electrolytic capacitoren_US
dc.typeConference_Paperen_US
dc.identifier.emailHui, SYR:ronhui@eee.hku.hken_US
dc.identifier.authorityHui, SYR=rp01510en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1109/IECON.2008.4758258en_US
dc.identifier.scopuseid_2-s2.0-63149149412en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-63149149412&selection=ref&src=s&origin=recordpageen_US
dc.identifier.spage1968en_US
dc.identifier.epage1973en_US
dc.identifier.scopusauthoridQin, YX=26423865900en_US
dc.identifier.scopusauthoridChung, HSH=7404007467en_US
dc.identifier.scopusauthoridLin, DY=26423811900en_US
dc.identifier.scopusauthoridHui, SYR=7202831744en_US

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