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1、INTERNATIONALJOURNALOFCIRCUITTHEORYANDAPPLICATIONSInt.J.Circ.Theor.Appl.2003;31:555–570(DOI:10.1002/cta.250)Applicationofdualityprincipletosynthesisofsingle-stagepower-factor-correctionvoltageregulatorsC.K.Tse∗;†,Y.M.Lai,R.J.XieandM.H.L.ChowDepartmentofElectronicandInformationEngineering;H
2、ongKongPolytechnicUniversity;HongKong;ChinaSUMMARYThedualityprincipleisappliedtoderivenewsingle-stagepower-factor-correction(PFC)voltagereg-ulators.Thispaperbeginswithanapplicationofdualitytransformationtoconventionaldiscontinuous-conduction-modebuck,buck-boostandboostconverters.Theresulti
3、ngdualconvertersoperateinthediscontinuouscapacitorvoltagemode.ThesenewconvertersprovidethesamePFCproperty,butinthedualmanner.Itisprovedthatinthepracticalcaseoftheinputbeingavoltagesource,themandatoryinsertionofinductancebetweenthevoltageinputandthe‘dualPFCconverter’doesnotaectthepower-fac
4、tor-correctingproperty.Anewsingle-stagePFCregulatorisderivedbytakingthedualofawell-knowncircuitbasedonacascadeofconventionalboostandbuckconverters.Analyticaldesignexpressionsarederived,illustratingtherelationbetweencurrentstressandcomponentvalues.Experi-mentsareperformedtoconrmtheoperatio
5、nofthecircuitanditspower-factor-correctingcapability.Copyright?2003JohnWiley&Sons,Ltd.KEYWORDS:duality;PFC;circuitsynthesis;switchingconverters;powersupplies1.INTRODUCTIONSingle-stagepower-factor-correction(PFC)regulatorsorintegratedrectierregulatorstyp-icallycontainalow-frequencystoragec
6、apacitorwhichbuersthedierencebetweentheinstantaneousinputpower,pin(t),andtheinstantaneousoutputpower,po(t),whichtakere-2spectivelytheformsˆpinsin!mtandPo,where!misthemainsangularfrequencyandPoisaconstant[1].Thebasiccongurationoftheseso-calledsingle-stagePFCregulators,ineect,consistsoft
7、wobasicconverterstagesincascade,whichoperateunderthecommandofonedrivesignal[2–5].Inthistypeofconverter,onebasicconverterplaystheroleofapowerfactorcorrector,whiletheotherservesasaregulator.Furthermore,sinceoperationofthePFCstageindiscontinuous-conduction-mode(D
