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1、外文翻译毕业设计题目:PWM信号发生器设计原文1:ControlofUnitPowerFactorPWMRectifier译文1:单位功率因数PWM整流器的控制原文1:Pulse-widthmodulation译文1:脉冲宽度调制ControlofUnitPowerFactorPWMRectifierZ.Peroutka,T.GlasbergerUniversityofWestBohemia/DepartmentofElectromechanicsandPowerElectronics,Plze_,CzechRepublice-mail:pero
2、utka@ieee.org,tglasber@kev.zcu.czABSTRACTTosolvetheproblemofharmonicpollutiontothepowergridthatcausedbytraditionaldioderectifierandphasecon-trolledrectifier,theunitpowerfactorPWMrectifierisdesigned.Thetopologystructureoftherectifiercircuitisintro-ducedandthedoubleclosed-loopc
3、ontrolstrategyinthree-phasestationarycoordinatesystemisanalyzed.Forthedefi-ciencyofcontrolstrategy,thecontrolstrategyintwo-phasesynchronousrotatingcoordinatesystemisproposed.Thismakestheindependentcontrolofactivecurrentandreactivecurrenttoberealized.ThesimulationmodelofthePWM
4、rectifierisbuiltandtheeffectivenessofthecontrolmethodproposedinthispaperisverifiedbysimulation.Keywords:Control;PWMRectifier;UnitPowerFactor;d,qCoordinates1IntroductionpowerfactorPWMrectifierhastheadvantagesofhighpowerfactor,lowharmoniccontentofgridsidecurrent,energybidirecti
5、onaltransmissionetc,iswidelyusedinACdrive,reactivepowerUnitycompensation,activepowerfilter,unifiedpowerflowcontrol,aswellasunin-terruptiblepowersupply,etc.Thispaperintroducesthetopologyofthree-phasePWMrectifier,anddescribesthecontrolmethodoftherectifierinthree-phasestaticcoor
6、dinatesystem.Onthebasisoftheanalysisoftheadvantagesanddisadvantagesofthiscontrolmethod,thecontrolmethodintwo-phasesynchronousrotatingcoor-dinatesystemisputforward.Thenthemathematicalmodelofthree-phasePWMrectifierind,qcoordinatesisestablishedandthesinglecontrolofactivecurrenta
7、ndrelativecurrentisrealized.2TheControlMethodofThree-phaseVoltageSourcePWMRectifierinThree-phaseStaticCoordinateSystemFigure1showsthetopologyofthree-phasevoltagesourcePWMrectifier,eaebecisthree-phasevoltagesource,CisthedcsidefilteringcapacityandRListheload.12Inordertorealizet
8、hecontrolofinputcurrentandoutputvoltage,thetraditionalmethodiscontro
