SCI 改进DCDC拓扑 双向

admin管理员组

文章数量:1584354

2024年2月2日发(作者：)

lishedinIETPowerElectronicsReceivedon12thJuly2012Revisedon21stSeptember2012Acceptedon29thOctober2012doi:10.1049/iet-pel.2012.0338ISSN1755-4535Studyofanon-isolatedbidirectionalDC–DCconverterC.-,L.-,rtmentofElectricalEngineering,FarEastUniversity,TainanCity,TaiwanE-mail:yanglungsheng@ract:Thestudypresentsanon-isolatedbidirectionalDC–DCconverter,,thesynchronousrectifitagegainoftheproposedconverteristhehalfandthedoubleoftheconventionalbidirectionalDC–DCbuck/boostconverterinthestep-downandstep-upmodes,oretheproposedconvertercanbeoperatedinwide-vtagestressesotion,y,aprototypecircuitisimplementedtoverifytheperformanceoftheproposedconverter.1IntroductionSincetheusageofthefossilfuelresultsinenvironmentalpollution,ntyears,therenewableenergysystems,includingphoto-voltaicsystems,fuel-cellsystems,wind-powergeneratingsystems,etherenewablesystemscannotprovideastablepowerforuser,therenewaerenewableenergysystemscannotsupplyenoughpowerfortheload,thebatterymustreplenishinsuffisthewholepoweroftherenewableenergysystemscannotbeusedcompletelybytheload,ethebidirectionalDC–DCconverterscantransferthepowerbetweentwoDCsourcesineitherdirection,theseconvertersarewidelyusedforrenewableenergyhybridpowersystems,ologiesoftheseconverlatedtypesincludetheflybacktype[1,2],forward-flybacktype[3,4],half-bridgetype[5–7]andfull-bridgetype[8–10].Theseconverterscanirectionalflheleakage-inductorenergycannotberecycled,,rtorecycletheleakage-inductorenergyandtoreducethevoltagestressesontheswitches,theenergy-regenerationtechniquesarepresentedtoclampthevoltagestressesandtoincreasetheconversionefficiency[2–4].Thenon-isolatedtypesincludethemulti-leveltype,switched-capacitortype,cuk/cuktype,sepic/zetatype,buck-boosttype,coupled-inductortype,three-level30typeandconventionalbuck/i-levelandswitched-capacitortypes,iflargevoltagegainmustbeprovided,moreswitchesandcapacitorsarerequired[11–15].Also,cuk/cukandsepic/zetatypes,theconversionefficiencyarelowbecausetheseconvertersarecombinedoftwopowerstages[16,17].Inaddition,cuitstructureofthebuck-boosttypeisverysimple,butthisconvertercannotoperateinwidevoltage-conversionrange[18].Thecoupled-inductortypescanachievelargevoltagegainbyadjustingtheturnratioofthecoupledinductor[19,20].However,thecircuitconfithree-leveltype,thevoltagestressesontheswitchesareahalfoftheconventionalbidirectionalDC–DCbuck/boosttype[21–23].Nevertheless,ventionalbidirectionalDC–DCbuck/boostconverterhassimplecircuitstructure,asshowninFig.1a[24–26].However,thestep-upvoltagegainislimitedbecauseoftheeffectoftheswitchesandtheequivalentseriesresistance(ESR),theconventi.1bshowstheproposedbidirectionalDC–DCconverter,tage-conversionrangeofthisconverteriswide,thantheconventionalbidirectionalbuck/ratingprinciplesandsteady-stateanalysesinthestep-upandstep-downmodesaredescribedinSections2and3,nditionsareassumedas:(i)TheON-stateresistanceRDS(ON)oftheswitchesandtheESRofthecapacitorsareignored.(ii)ThecapacitorsCH1,CH2,andCLarelargeenough,andthevoltagesacrossthecapacitorscanbetreatedasconstant.(iii),VH1=VH2=VH/erElectron.,2013,Vol.6,Iss.1,pp.30–37doi:10.1049/iet-pel.2012.0338&TheInstitutionofEngineeringandTechnology2013

Fig.1ConventionalandproposedbidirectionalDC–DCconverteraConventionalbidirectionalbuck/boostconverterbProposedbidirectionalconverter2Step-downmodeoftheproposedconverterInthestep-downmode,se-widthmodulation(PWM)tchesSrectifi.2andS3shows3aresometypicalwaveformsincontinuous-conduction-mode(CCM)ratingprinciplesandsteady-stateanalysesaredescribedasfollows:(1)Mode1,[tandtheswitches0,tS1]:me,the3isusedforthesynchronousrectifirent-flrgyofthehigh-voltagesideVtransferredtotheinductorLcapacitorCH1is1,isgivenL,,thevoltageacrosstheinductorL1vIVLH1=2−VL(1)ThecurrentthroughtheinductorL1isobtainedas

本文标签： 改进拓扑双向