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Conference Paper: A novel electrode power profiler for dimmable ballasts using DC link voltage and switching frequency controls

TitleA novel electrode power profiler for dimmable ballasts using DC link voltage and switching frequency controls
Authors
KeywordsDimming (Lamps)
Electric Frequency Control
Electric Inverters
Electrodes
Feedback Control
Mathematical Models
Resonant Circuits
Issue Date2002
PublisherIEEE
Citation
Pesc Record - Ieee Annual Power Electronics Specialists Conference, 2002, v. 1, p. 192-197 How to Cite?
AbstractA novel electrode power profiler for dimmable ballasts using series-resonant parallel-loaded inverter is presented. Dimming of fluorescent lamps and control of the electrode power are achieved by simultaneously adjusting the dc link voltage and the switching frequency of the inverter. The current gradient along the electrode, which is due to the distributed lamp current property on the electrode, is deliberated in formulating the power and voltage models of the electrode. As the electrode heating relies on two near-orthogonal current components including the lamp current and the resonant tank circuit current, a simple feedback control is developed to derive the electrode power. Reduction of the electrode power (due to the decrease in the lamp current) during dimming is compensated by increasing the switching frequency of the inverter, in order to increase the resonant tank circuit current. Experimental results of a T8 36W prototype are verified with theoretical predictions.
Persistent Identifierhttp://hdl.handle.net/10722/136805
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorLee, STSen_HK
dc.contributor.authorChung, HSHen_HK
dc.contributor.authorHui, SYRen_HK
dc.date.accessioned2011-07-29T02:12:45Z-
dc.date.available2011-07-29T02:12:45Z-
dc.date.issued2002en_HK
dc.identifier.citationPesc Record - Ieee Annual Power Electronics Specialists Conference, 2002, v. 1, p. 192-197en_HK
dc.identifier.issn0275-9306en_HK
dc.identifier.urihttp://hdl.handle.net/10722/136805-
dc.description.abstractA novel electrode power profiler for dimmable ballasts using series-resonant parallel-loaded inverter is presented. Dimming of fluorescent lamps and control of the electrode power are achieved by simultaneously adjusting the dc link voltage and the switching frequency of the inverter. The current gradient along the electrode, which is due to the distributed lamp current property on the electrode, is deliberated in formulating the power and voltage models of the electrode. As the electrode heating relies on two near-orthogonal current components including the lamp current and the resonant tank circuit current, a simple feedback control is developed to derive the electrode power. Reduction of the electrode power (due to the decrease in the lamp current) during dimming is compensated by increasing the switching frequency of the inverter, in order to increase the resonant tank circuit current. Experimental results of a T8 36W prototype are verified with theoretical predictions.en_HK
dc.languageengen_US
dc.publisherIEEEen_US
dc.relation.ispartofPESC Record - IEEE Annual Power Electronics Specialists Conferenceen_HK
dc.subjectDimming (Lamps)en_US
dc.subjectElectric Frequency Controlen_US
dc.subjectElectric Invertersen_US
dc.subjectElectrodesen_US
dc.subjectFeedback Controlen_US
dc.subjectMathematical Modelsen_US
dc.subjectResonant Circuitsen_US
dc.titleA novel electrode power profiler for dimmable ballasts using DC link voltage and switching frequency controlsen_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-s2.0-0036440547en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036440547&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume1en_HK
dc.identifier.spage192en_HK
dc.identifier.epage197en_HK
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLee, STS=35468613000en_HK
dc.identifier.scopusauthoridChung, HSH=7404007467en_HK
dc.identifier.scopusauthoridHui, SYR=7202831744en_HK

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