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20世纪人类最伟大的２０项科技成果
电力电子装置的分类电力电子技术发展电力电子系统问题电力电子装置的技术指标通讯基础电源的系统Objective:maintainv(t)equaltoanaccurate,andconstantvalueV.
Therearedisturbancesdueto
•inputvg(t)
•loadR

ThereareuncertaintiesincomponentvaluesObjectiveofmodelingtheconverterHowtomodeltheconverterorinverter
isthegoalofthiscourse?ModelingofCCMDC/DCconverter
ModelingofDCMDC/DCconverter
ModelingofDC/DCconverterwithcurrentpeakcontrol
CompensationdesignforDC/DCconvertersystem
Modelingofsinglephaseinverter
ModelingofThreephaseinverterorconverterChapter1
ModelingofCCMDC/DCconverterDeveloptoolsformodelingofCCMDC/DCconvertersystems

HowdoACvariationsinvg(t),R,ord(t)affecttheoutputvoltagev(t)?

Whatarethesmall-signaltransferfunctionsoftheconverter?Capturedominantbehaviorandignoreinsignificantphenomena
Simplifiedmodelyieldsphysicalinsight,allowingengineertodesignsystemtooperateinspecifiedmanner
DC/DCconvertersystem(staticstate)
DandDmareconstants,|Dm|<<D
frequencyismuchsmallerthantheconverterswitchingfrequencyContainsfrequencycomponentsat:
•Modulationfrequencyanditsharmonics
•Switchingfrequencyanditsharmonics
•SidebandsofswitchingfrequencyInput-outputrelationshipInput-outputrelationshipconsideringACcomponents
Approach:
•Removeswitchingharmonicsbyaveragingthewaveformoverone
switchingperiodAveragingtoremoveswitchingrippleExplanationFiltercharacteristicsFunctionofaveragingoperatorInductorequation:




DividebyLandintegrateoveroneswitchingperiod:



Left-handsideisthechangeininductorcurrent.Right-handsidecan
beexpressedasaverageinductorvoltagemultipliedbyTs/L
asfollows:




Thenetchangeininductorcurrentoveroneswitchingperiodis
equaltotheperiodTsmultipliedbytheaverageslopeEulerformulaEquationsforinductorandcapacitorCCMBuck-boostconverterexampleStage1:Switchinposition1Stage2:Switchinposition2AveragetheinductorvoltageAveragecapacitorcurrentAccordingto
Buck-boostinputcurrentwaveformisConverteraverageequationsPerturbationandlinearizationConstructsmall-signalmodel:
LinearizeaboutquiescentoperatingpointIntroducetheperturbatio