Advanced High-Frequency Electronic Ballasting Techniques for Gas Discharge Lamps

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dc.contributor.authorTao, Fengfengen
dc.contributor.committeechairLee, Fred C.en
dc.contributor.committeemembervan Wyk, Jacobus Danielen
dc.contributor.committeememberNelson, Douglas J.en
dc.contributor.committeememberHuang, Alex Q.en
dc.contributor.committeememberLai, Jih-Shengen
dc.contributor.committeememberChen, Dan Y.en
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessioned2014-03-14T20:06:40Zen
dc.date.adate2002-01-10en
dc.date.available2014-03-14T20:06:40Zen
dc.date.issued2001-12-19en
dc.date.rdate2003-01-10en
dc.date.sdate2002-01-10en
dc.description.abstractSmall size, light weight, high efficacy, longer lifetime and controllable output are the main advantages of high-frequency electronic ballasts for gas discharge lamps. However, power line quality and electromagnetic interference (EMI) issues arise when a simple peak rectifying circuit is used. To suppress harmonic currents and improve power factor, input-current-shaping (ICS) or power-factor-correction (PFC) techniques are necessary. This dissertation addresses advanced high-frequency electronic ballasting techniques by using a single-stage PFC approach. The proposed techniques include single-stage boost-derived PFC electronic ballasts with voltage-divider-rectifier front ends, single-stage PFC electronic ballasts with wide range dimming controls, single-stage charge-pump PFC electronic ballasts with lamp voltage feedback, and self-oscillating single-stage PFC electronic ballasts. Single-stage boost-derived PFC electronic ballasts with voltage-divider-rectifier front ends are developed to solve the problem imposed by the high boost conversion ratio required by commonly used boost-derived PFC electronic ballast. Two circuit implementations are proposed, analyzed and verified by experimental results. Due to the interaction between the PFC stage and the inverter stage, extremely high bus-voltage stress may exist during dimming operation. To reduce the bus voltage and achieve a wide-range dimming control, a novel PFC electronic ballast with asymmetrical duty-ratio control is proposed. Experimental results show that wide stable dimming operation is achieved with constant switching frequency. Charge-pump (CP) PFC techniques utilize a high-frequency current source (CS) or voltage source (VS) or both to charge and discharge the so-called charge-pump capacitor in order to achieve PFC. The bulky DCM boost inductor is eliminated so that this family of PFC circuits has the potential for low cost and small size. A family of CPPFC electronic ballasts is investigated. A novel VSCS-CPPFC electronic ballast with lamp-voltage feedback is proposed to reduce the bus-voltage stress. This family of CPPFC electronic ballasts are implemented and evaluated, and verified by experimental results. To further reduce the cost and size, a self-oscillating technique is applied to the CPPFC electronic ballast. Novel winding voltage modulation and current injection concepts are proposed to modulate the switching frequency. Experimental results show that the self-oscillating CS-CPPFC electronic ballast with current injection offers a more cost-effective solution for non-dimming electronic ballast applications.en
dc.description.degreePh. D.en
dc.identifier.otheretd-01102002-000548en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01102002-000548/en
dc.identifier.urihttp://hdl.handle.net/10919/25978en
dc.publisherVirginia Techen
dc.relation.haspartETD.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectpower factor correctionen
dc.subjectelectronic ballasten
dc.subjectpower converteren
dc.subjectself-oscillationen
dc.titleAdvanced High-Frequency Electronic Ballasting Techniques for Gas Discharge Lampsen
dc.typeDissertationen
thesis.degree.disciplineElectrical and Computer Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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