双向DC-DC变换器软开关（完整版）实用资料(可以直接使用，可编辑完整版实用资料，欢迎下载）ANewZVSBidirectionalDC-DCConverterWithPhase-ShiftPlusPWMControlSchemeHuafengXiao,LiangGuo,ShaojunXieCollegeofAutomationEngineering,NanjingUniversityofAeronauticsandAstronauticsNanjing,210016,ChinaAbstract-Thecurrent-voltage-fedbidirectionalDC-DCconvertercanrealizeZVSfortheswitcheswiththeuseofthephase-shft(PStechnology,howeverthecurrent-fedswtchessufferfromhighvoltagespikeandhighcirculatingconductionlosses.Inordertosolvetheseproblems,anovelphase-shiftplusPWM(PSPcontrolZVSb-drectonalDC-DCconvertersproposed,whichadoptsactiveclampingbranchandPWMtechnology.ThenovelconvertercanrealizeZVSforallpowerswitchesfromnoloadtofullload.Theoperationprincipleisanalyzedandverifiedbya28V/270Vconversionprototyperatedat1.5kW.I.INTRODUCTIONInrecentyears,thedevelopmentofhighpowerisolatedbidirectionaldc-dcconverters(BDChasbecomeanimportanttopicbecauseoftherequirementsofelectricvehicle,uninterruptiblepowersupply(UPSandaviationpowersystem[1-7].InatypicalUPSsystem,thebatteryischargedwhenthemainpowersourceisnormalandthebatterydischargestosupplypowerintheeventofloseofmainpowersource.Intheaircrafthighvoltagedirectcurrent(HVDCpowersupplysystem,whenthe270VHVDCgeneratorisingear,itchargesthe28Vbatteryandsuppliesthe28VkeyloadbytheBDC,andwhenthegeneratorisinfailure,the28Vbatterydischargestosupply270VkeyloadbytheBDC.Thehigh-lowvoltageconversionandelectricalisolationarenecessaryinabove-mentionedcondition.Thecurrent-voltage-fedBDCisfitforsuchsystemduetoithasahighvoltageconversionratioandlowcurrentripple.Adualactivefullbridgedc-dcconverterwasproposedforhighpowerBDC[4,5],whichemploystwovoltage-fedinverterstodriveeachsidesofatransformer.ItssymmetricstructureenablesthebidirectionalpowerflowandZVSforallswitches.Adualactivehalfbridgecurrent-voltage-fedsoft-switchingbidirectionaldc-dcconverterwasproposedwithreducedpowercomponents[6],however,thecurrent-fedhalfbridgesuffersfromahighvoltagespikebecauseoftheleakageinductanceofthetransformer.Whenthevol