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Article: 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
KeywordsDimmable electronic ballasts
Fluorescent lamps
Illumination
Illumination control
Issue Date2004
PublisherIEEE
Citation
Ieee Transactions On Power Electronics, 2004, v. 19 n. 6, p. 1653-1660 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 and result in a wider dimming range and improved controllability. The method gives a simple solution of improving the dimming characteristics without changing the circuit structure. A fundamental frequency model that includes the characteristics of the nonlinear lamp resistance and filament resistance is applied in the analysis. A PSIM simulation model for the saturable inductor is developed. Theoretical predictions are verified with the experimental results of a 36-W T8 prototype. © 2004 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/136987
ISSN
2015 Impact Factor: 4.953
2015 SCImago Journal Rankings: 3.005
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLee, STSen_HK
dc.contributor.authorChung, HSHen_HK
dc.contributor.authorHui, SYen_HK
dc.date.accessioned2011-07-29T02:13:58Z-
dc.date.available2011-07-29T02:13:58Z-
dc.date.issued2004en_HK
dc.identifier.citationIeee Transactions On Power Electronics, 2004, v. 19 n. 6, p. 1653-1660en_HK
dc.identifier.issn0885-8993en_HK
dc.identifier.urihttp://hdl.handle.net/10722/136987-
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 and result in a wider dimming range and improved controllability. The method gives a simple solution of improving the dimming characteristics without changing the circuit structure. A fundamental frequency model that includes the characteristics of the nonlinear lamp resistance and filament resistance is applied in the analysis. A PSIM simulation model for the saturable inductor is developed. Theoretical predictions are verified with the experimental results of a 36-W T8 prototype. © 2004 IEEE.en_HK
dc.languageengen_US
dc.publisherIEEEen_US
dc.relation.ispartofIEEE Transactions on Power Electronicsen_HK
dc.subjectDimmable electronic ballastsen_HK
dc.subjectFluorescent lampsen_HK
dc.subjectIlluminationen_HK
dc.subjectIllumination controlen_HK
dc.titleUse of saturable inductor to improve the dimming characteristics of frequency-controlled dimmable electronic ballastsen_HK
dc.typeArticleen_HK
dc.identifier.emailHui, SY:ronhui@eee.hku.hken_HK
dc.identifier.authorityHui, SY=rp01510en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1109/TPEL.2004.836627en_HK
dc.identifier.scopuseid_2-s2.0-9244248148en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-9244248148&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume19en_HK
dc.identifier.issue6en_HK
dc.identifier.spage1653en_HK
dc.identifier.epage1660en_HK
dc.identifier.isiWOS:000224900700033-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLee, STS=35468613000en_HK
dc.identifier.scopusauthoridChung, HSH=7404007467en_HK
dc.identifier.scopusauthoridHui, SY=7202831744en_HK

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