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1、200435thAnnualIEEEPowerElectronicsSpecialistsConferenceAachen,Germany,2004AFamilyofPWMplusPhase-ShiftBidirectionalDC-DCConvertersHaifengFan,DehongXuCollegeofElectricalEngineering,ZhejiangUniversity,Hangzhou,P.R.ChinaEmail:xdh@cee.zju.edu.cnelement.ConceptualcircuitofPScontrolisshownin
2、Fig.2a,Abstract—PWMisintroducedtophase-shiftbidirectionalandthatofPPScontrolisshowninFig.2b.ThePWMcontrolDC-DCconverters,whichcanreducecurrentstresses,ofdutycyclescanbeseenasanelectrictransformerwhichconductionlossandswitchinglossofsemiconductorsandcanregulatestheamplitudesofequivalen
3、tinputvoltage(Vab)andexpandZVSrange.AtechniquetosynthesizePWMplusequivalentoutputvoltage(Vcd),sothatbothpositiveandphase-shiftbidirectionalDC-DCconvertertopologiesisnegativeamplitudesoftheequivalentinputvoltage(Vab)arepresented.Theoreticalanalysis,simulationandexperimentalresultsofone
4、particularconvertertakenasanexample,areequaltothoseoftheequivalentoutputvoltage(Vcd)[2].providedinthispaper.iL1acL1I.INTRODUCTIONVVBidirectionalDC-DCconvertersareexpectedtobeabcdbdcandidatesforapplicationssuchasDC-UPS,energymanagement,andauxiliarypowersuppliesinelectricvehiclesFig.2a.
5、ConceptualcircuitofPScontrol[1-2].Recently,bidirectionalDC-DCconverterswerePWMcontrolinvestigated,aimingatminimizingthesizeandweightofiL1bidirectionalDC-DCconvertersandEMIthroughacsoft-switchingmethod[3-5].Phase-Shift(PS)bidirectionalL1ElectricDC-DCconverterisattractivesinceitcanreali
6、zeZVStransformerVVwithoutauxiliaryswitches.HoweverithashighcurrentabcdstressesandnarrowZVSrangewhentheamplitudeofinputbdvoltageisnotmatchedwiththatofoutputvoltage.TheauthorshaveproposedPWMplusphase-shiftbidirectionalFig.2b.ConceptualcircuitofPPScontrolDC-DCconverter,whichfeaturesreduc
7、edcurrentstress,conductionlosses,switchinglossesofsemiconductorsandwideZVSrange[2].Actually,PWMplusPhase-ShiftControl(PPS)canbeextendedtoaseriesofphase-shiftbidirectionalVabV1＋DC-DCconverters.VInthispaper,atechniquetosynthesizebidirectional1－DC-DCconverterstopologiesispresented.Theore
8、tical
