欢迎来到天天文库
浏览记录
ID:33492437
大小:550.67 KB
页数:42页
时间:2019-02-26
《电力电子技术英文版 chapter05》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、PPoowwererEEllececttrronionicscsChapter5DCtoDCConverters(Choppers)OuOuttlliinene5.1BasicDCtoDCconverters5.2CompositeDC/DCconvertersandElectronicsconnectionofmultipleDC/DCconverters5.3IsolatedDCtoDCconverters(IndirectDCtoDCconverters)Power25.1BasicDCBasicDCtotoDCcDCcoonn
2、vveerrtteersrs5.1.1Buckconverter(Step-downconverter)5.1.2Boostconverter(Step-upconverter)Electronics5.1.3Buck-Boostconverter(Step-down/step-upconverter)andCukconverterPower5.1.4SepicconverterandZetaconverterPartoftheslidesofthissectionistakenandmodifiedfrom:R.Ericksonan
3、dD.Maksimovic.FundamentalsofPowerElectronics.KluwerAcademicPublishers,200135.1BasicDC5.1BasicDCtotoDCcDCcoonnvveerrtteersrsIntroduction—BuckconverterSPDTswitchchangesdccomponentElectronicsSwitchoutputvoltagewaveformDutycycleD:Power0£D£1complementD’:D’=1-D4Dccomponentofs
4、witchoutputvoltageElectronicsFourieranalysis:Dccomponent=averagevaluePower5Insertionoflow-passfiltertoremoveswitchingharmonicsandpassonlydccomponentElectronicsPower6BasicoperationprincipleofbuckconverterBuckconverterwithidealswitchElectronicsRealizationPowerusingpowerMO
5、SFETanddiode7ThoughtprocessinanalyzingbasicDC/DCconvertersBasicoperationprinciple(qualitativeanalysis)–Howdoescurrentflowduringdifferentswitchingstates–HowisenergytransferredduringdifferentswitchingstatesVerificationofsmallrippleapproximationElectronicsDerivationofinduc
6、torvoltagewaveformorcapacitorcurrentwaveformduringdifferentswitchingstatesQuantitativeanalysisaccordingtoinductorvolt-secondPowerbalanceorcapacitorchargebalance8ActualoutputvoltagewaveformofbuckconverterBuckconvertercontainingpracticallow-passfilterElectronicsActualoutp
7、utvoltagewaveformPowerv(t)=V+vripple(t)9Thesmallrippleapproximationv(t)=V+v(t)rippleElectronicsInawell-designedconverter,theoutputvoltagerippleissmall.Hence,thewaveformscanbeeasilydeterminedbyignoringtheripple:Power10Buckconverteranalysis:inductorcurrentwaveformElectron
8、icsPower11Inductorvoltageandcurrentsubinterval1:switchinposition1ElectronicsPower12Inductorvoltageandcurrentsu
此文档下载收益归作者所有