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外文翻译

第一篇：外文翻译LowVoltageFlybackDC-DCConverterForPowerSupplyApplicationsHangzhouLiu1,JohnElmes2,KejiuZhang1,ThomasX.Wu1,IssaBatarseh1DepartmentofElectricalEngineeringandComputerScience,UniversityofCentralFlorida,Orlando,FL32816,USAAdvancedPowerElectronicsCorporation,Orlando,FL32826,USAAbstract：Inthispaper,wedesignalowvoltageDC-DCconverterwithaflybacktransformer.TheconverterwillbeusedasabiasedpowersupplytodriveIGBTs.TheflybacktransformerusingplanarEI-coreisdesignedandsimulatedusingANSYSPExprtsoftware.Besides,anLT3574ICchipfromLinearTechnologyhasbeenchosenforconvertercontrol.Finally,theconvertermodelingandsimulationarepresentedandPCBlayoutisdesigned.Keywords：Flyback,anLT3574IC,PCBI.INTRODUCTIONThegoalofthisprojectistodevelopandbuildaprototypeofahigh-efficiency,high-temperatureisolatedDC-DCconvertertobeusedasabiasedpowersupplyfordrivingacomplementaryIGBTpair.Itisimportantthattheconvertercandelivertherequiredpoweratanambienttemperatureofupto100℃;thereforeithastobeefficientsothatitscomponentsdonotexceedtheirmaximumtemperatureratings.Thefinalconverterwillbecompletelysealedandpottedinametalcase.Theinputvoltagerangeforthisconverterisfrom9Vto36V.Theoutputsideshavetwoterminals,oneis﹢16Vandtheotheroneis﹣6V.Inordertogetthedesiredperformance,anLT3574ICchipfromLinearTechnologyisused.Thekeytothisdesignistheflybacktransformer.ThetransformerusingplanarEI-coreisdesignedandsimulatedusingANSYSPExprtsoftware.Finally,thePCBlayoutoftheconverterwillbepresented.II.KEYDESIGNOUTLINEForthisflybacktopology,theoutputvoltagecanbedeterminedbyboththetransformerturnsratioandtheflybackloopresistorpairs.Therefore,attheinitialdesignstage,wecanchooseaconvenientturn’sratioforthetransformer,andmodifyitlateronifnecessarytomakesuretheoutputperformanceisdesirableandthetransformerwillnotsaturate[1].TherelationshipbetweentransformersturnsratioanddutycyclecanbefoundasWherenisthetransformerturnsratio,Disthedutycycle,VO`isthesumoftheoutputvoltageplustherectifierdropvoltage,VINistheinputvoltageofthetransformer.Thev