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Conference Paper: Use of saturable inductor to improve the dimming characteristics of frequency-controlled dimmable electronic ballasts

TitleUse of saturable inductor to improve the dimming characteristics of frequency-controlled dimmable electronic ballasts
Authors
KeywordsCapacitors
Electric Currents
Electric Frequency Control
Electric Inductors
Electric Inverters
Electric Loads
Resonant Circuits
Issue Date2003
PublisherIEEE
Citation
Pesc Record - Ieee Annual Power Electronics Specialists Conference, 2003, v. 3, p. 988-993 How to Cite?
AbstractThis paper presents an investigation into the use of saturable inductor to improve the dimming characteristics of frequency-controlled dimmable electronic ballasts with a half-bridge series-resonant parallel-loaded inverter. The concept is based on the fact that the effective resonant frequency increases as the inductor current increases, if the unsaturable inductor in the resonant tank circuit is replaced with a saturable one. Susceptibility of the lamp power to the switching frequency variation at low luminous level can be reduced. This can lessen the problem of lamp flickers at dimmed level, resulting in a wider dimming range and improved controllability. The method gives a simple solution of improving the dimming characteristics without changing the circuit structure. Theoretical predictions are verified with the experimental results of a 36W T8 prototype.
Persistent Identifierhttp://hdl.handle.net/10722/137006
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorLee, SSTen_HK
dc.contributor.authorChan, Sen_HK
dc.contributor.authorChung, HSHen_HK
dc.contributor.authorHui, SYRen_HK
dc.date.accessioned2011-07-29T02:14:05Z-
dc.date.available2011-07-29T02:14:05Z-
dc.date.issued2003en_HK
dc.identifier.citationPesc Record - Ieee Annual Power Electronics Specialists Conference, 2003, v. 3, p. 988-993en_HK
dc.identifier.issn0275-9306en_HK
dc.identifier.urihttp://hdl.handle.net/10722/137006-
dc.description.abstractThis paper presents an investigation into the use of saturable inductor to improve the dimming characteristics of frequency-controlled dimmable electronic ballasts with a half-bridge series-resonant parallel-loaded inverter. The concept is based on the fact that the effective resonant frequency increases as the inductor current increases, if the unsaturable inductor in the resonant tank circuit is replaced with a saturable one. Susceptibility of the lamp power to the switching frequency variation at low luminous level can be reduced. This can lessen the problem of lamp flickers at dimmed level, resulting in a wider dimming range and improved controllability. The method gives a simple solution of improving the dimming characteristics without changing the circuit structure. Theoretical predictions are verified with the experimental results of a 36W T8 prototype.en_HK
dc.languageengen_US
dc.publisherIEEEen_US
dc.relation.ispartofPESC Record - IEEE Annual Power Electronics Specialists Conferenceen_HK
dc.subjectCapacitorsen_US
dc.subjectElectric Currentsen_US
dc.subjectElectric Frequency Controlen_US
dc.subjectElectric Inductorsen_US
dc.subjectElectric Invertersen_US
dc.subjectElectric Loadsen_US
dc.subjectResonant Circuitsen_US
dc.titleUse of saturable inductor to improve the dimming characteristics of frequency-controlled dimmable electronic ballastsen_HK
dc.typeConference_Paperen_HK
dc.identifier.emailHui, SYR:ronhui@eee.hku.hken_HK
dc.identifier.authorityHui, SYR=rp01510en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0042658167en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0042658167&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume3en_HK
dc.identifier.spage988en_HK
dc.identifier.epage993en_HK
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLee, SST=7601392076en_HK
dc.identifier.scopusauthoridChan, S=7404255083en_HK
dc.identifier.scopusauthoridChung, HSH=7404007467en_HK
dc.identifier.scopusauthoridHui, SYR=7202831744en_HK

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