High-frequency off-line power conversion using quasi-resonant and multi-resonant techniques

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dc.contributor.authorJovanović, Milan Miodragen
dc.contributor.committeechairLee, Freden
dc.contributor.committeememberBurton, Larry C.en
dc.contributor.committeememberChen, De Yu "Dan"en
dc.contributor.committeememberRiess, R. Deanen
dc.contributor.committeememberStephenson, F. Williamen
dc.contributor.committeememberVorperian, Vatcheen
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2015-06-24T13:35:09Zen
dc.date.available2015-06-24T13:35:09Zen
dc.date.issued1988en
dc.description.abstractThree recently-proposed power conversion technologies, the zero-current-switching (ZCS) and zero-voltage-switching (ZVS) quasi-resonant techniques, and the zero-voltage-switching multi-resonant technique, are evaluated for high-frequency, off-line applications. The study is performed with emphasis on the conversion-frequency range, efficiency, load range, input-voltage range, output power, dynamic response, and power density. A comprehensive dc analysis of the half-wave and full-wave, half-bridge zero-current-switched quasi-resonant converters (QRCs) is presented. Design procedures for closed-loop design of the converters are also derived. The procedures are used to design and fabricate half-wave and full-wave converters operating in the low-megahertz range and experimentally assess their suitability for high-frequency, off-line power conversion. The zero-voltage-switching technique is employed to further increase the conversion frequency. First, the half-bridge zero-voltage-switched quasi-resonant converter is analyzed and the trade-offs between its frequency range, load range, and efficiency are examined in detail. The multi-resonant-switch concept is applied to this converter to improve its characteristics, primarily its load range. A complete dc analysis of the zero-voltage-switched multi-resonant converter (MRC) is given and the dc voltage-conversion-ratio characteristics are derived. A graphic design procedure for the converter is established and is used to build an experimental 100 W, off-line converter operating in the frequency range of 2 MHz to 8 MHz. Finally, a comprehensive comparison of the QRCs and MRCs is performed and conditions where their applications appears most desirable are defined.en
dc.description.degreePh. D.en
dc.format.extentxix, 363 leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/53542en
dc.language.isoen_USen
dc.publisherVirginia Polytechnic Institute and State Universityen
dc.relation.isformatofOCLC# 19758707en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1988.J672en
dc.subject.lcshElectric current convertersen
dc.subject.lcshPower electronicsen
dc.titleHigh-frequency off-line power conversion using quasi-resonant and multi-resonant techniquesen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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