上海交大电力电子技术CH1 introduction.pptx
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上海交大电力电子技术CH1 introduction.pptx
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PowerElectronics,ShanghaiJiaoTongUniversityE.EDepartmentWangYong,Contact:
Mobile:
15800793762CopyrightpartlyfromJohnWiley&Sons,Inc,AboutThisCourse,ThreePartsofthiscourse:
PowerelectronicdevicesPowerelectroniccircuitsCh2-Ch8Applications2timeslectureRequiredBook:
PowerElectronics:
Converters,Application,AndDesign(ThirdEdition),NedMohan电力电子学变换器、应用和设计,高等教育出版社ReferenceBooks:
电力电子技术(第五版),西安交通大学王兆安、刘进军主编,机械工业出版社电力电子技术基础金如麟,谭茀娃编著,上海交通大学出版社,Thecriteriaforthescoring,Introduction,1-1Introduction1-2Powerelectronicsversuslinearelectronics1-3Scopeandapplications1-4Classificationofpowerprocessorsandconverte1-5Aboutthetext1-6Interdisciplinarynatureofpowerelectronics,Powerelectronicsreferstocontrolandconversionofelectricalpowerbypowersemiconductordeviceswhereinthesedevicesoperateasswitches.,Atypicalpowerelectronicsystem2questions:
Whattodo?
Howtodo?
Whatispowerelectronics,ACMeter,UtilityPowerGrid,InverterSolarmodules,Aconcreteexample,LinearPowerSupply,Control,sothatwehave,e.g.SeriestransistoractsasanadjustableresistorLowEfficiencyHeavyandbulky(forlinetransformer),VT,Switch-ModePowerSupply,BasicPrincipleofSwitch-ModePowerSupply,ConstantswitchingfrequencyPulsewidthcontrolstheoutputL-CfilterstherippleTransistoractsasaswitchHighEfficiencyforidealswitchwhenturnonu=0whenturnoffi=0ploss=ui0High-FrequencyTransformer(muchsmallerandlighter)MoreEMI(electro-magneticinterference),(muchmoreharmonic),Voltage-secondbalance,Abouttheefficiency,hereefficiencydefinedwith,highefficiencylowerPlosslessheatdissipatedsmallcoolingsystemhigherreliabilityhigherpowerdensitysmallsizeandlessweight,lowtemperatureriseandhigherreliabilitylowercost,Applications,AC-DCConversion(Rectifier)BatterychargersVariablespeeddcmotordrivesRegulatedDCpowersuppliesHighvoltageDCtransmissionDC-DCConversionDCpowersupplyDCdrive,DC-ACConversion(Inverter),EmergencylightingsystemsVariable-frequencyacmotordrivesUninterruptedpowersupplies(UPS)AircraftandspacepowersuppliesAC-ACConversionCyclo-converter:
theoutputfrequencyisasimplefractionofthesourcefrequencyMatrixconverter,Classificationofpowerconverters,Themaintasksofpowerelectronicsistocontrolandconvertelectricalpowerfromoneformtoanother.,Example:
Alaptopcomputerpowersupplysystem,Matrixconverter,ThedesignworkofthesystemmustconsidertheissuesbelowControlEfficiencyCostReliabilityHarmonics,RelationwithmultipledisciplinesPowerelectronicsistheinterfacebetweenelectronicsandpower.Itconcernsmanydisciplines.Itisthemostactivedisciplineinelectricpowerengineering.,InterdisciplinarynatureofPE,
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