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1、InternationalConferenceonControl,AutomationandSystems2010Oct.27-30,2010inKINTEX,Gyeonggi-do,KoreaReducingWeightofthePowerSupplySystemsforRollingStockbyUsingResonanceDC-DCConverter111Jeong-MinJoandYoung-JaeHanandChang-YoungLee23andHyun-SeungJeongandIn-DukPark1DepartmentofUltraHigh-SpeedTrainsResear
2、ch,KoreaRailroadResearchDivision,Uiwang,Korea(Tel:+82-31-460-5619;E-mail:jmjo@krri.re.kr)2DepartmentofRailstructures,KoreaRailroadResearchDivision,Uiwang,Korea(Tel:+82-31-460-5619;E-mail:jhs@krri.re.kr)3Departmentofelectricity,DaeDukUniversity,Daejeon,Korea(Tel:+81-42-866-0331;E-mail:han7770@ddu.a
3、c.kr)Abstract:Lightweightpowersupplysystemsusingsoft-switchedhighfrequencydc-dcconverterforrollingstockisproposedinthispaper.Thesystemconsistsofhardswitchedboostchopper,softswitchedhighfrequencyinverter,highfrequencytransformerandrectifier.Thissystemfeaturesaboostchoppertocontroltheinputcurrentand
4、tosetupacontrolledDClink.AndAsoftswitchedfullbridgeinverterpowersahighfrequencytransformerfromthisDClink.Thereforethe750DClinkvoltageisinvertedinto20KHzhighfrequencyacvoltage,whichisisolatedbyhighfrequencytransformer,andthentheoutputvoltageofthetransformerisrectifiedbysinglephaserectifiers.Owingto
5、theuseofzerovoltageandzerocurrent,theonboardpowersupplysystemonrollingstockhasadvantagesofhighefficiency,highenergydensity,smallvolumeandlightinweight.TheresultsofsimulationshowthatthepowerelectronicsconverterusingresonanceDC-DCconverterisfeasibletothepowersupplysystemforrollingstockKeywords:DC-DC
6、converter,softswitchinginverter,rollingstock,lightweight,powersupply1.INTRODUCTION2.SystemStructureandControlDuetoenvironmentalconcernsandfuelconservationaswellaspolitical,thereisagrowinginterestinthe2.1BackgroundreducingweightofonboardpowersupplysystemforAchievinghighefficiencyindc-dcconvertersro
7、llingstock.Inthepast,atransformerinpowersupplyoperatingathighfrequenciesnecessitatesmeanstokeepsystem(StaticInverter)wasusedwhereinput-outputtheswitchinglosstoaminimum.Inhard-switchingohmicisolationismandatory.To
