电力电子技术英文版 chapter04

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1、PPoowwererEEllececttrronionicscsChapter4DCtoACConverters(Inverters)AApppplicalicattiiononssofofIInnvveerrtteersrsConversionofelectricpowerfromDCtypeenergysourcestoACtypeload–Battery–Photovoltaiccell(Solarcell)Electronics–FuelcellAsapartofcompositeconverter–AC-DC-ACf

2、requencyconverter(forACmotordrive)–AC-DC-ACconstant-voltageconstant-frequencyconverter(forPoweruninterruptablepowersupplies)–AC-DC-ACConvertersforinductionheating–AC-DC-AC-DCswitchingpowersupplies2OuOuttlliinene4.1Commutation4.2Voltagesourceinverters4.3Currentsource

3、invertersElectronics4.4Multiple-inverterconnectionsandmulti-levelinvertersPower34.1C4.1CoommmmuuttaattiioonnttyyppesesBasicoperationprincipleofinvertersuoSS13iioLoadoUdSuoS4t1t2tElectronics2Aclassificationofinverters–Square-waveinverters(arediscussedinthischapter)Po

4、wer–PWMinverters(willbediscussedinChapter6)Theconceptofcommutation44typesofcommutationDevicecommutation:Fully-controlleddevices:GTO,IGBT,MOSFETLinecommutationPhase-controlledrectifierElectronicsPhase-controlledACcontrollerThyristorcycloconverterLoadcommutationPowerF

5、orcedcommutation5LoadcommutationElectronicsPowerCondition:LoadcurrentisleadingloadvoltageApplication:capacitiveload,synchronousmotor6Forcedcommutation(capacitancecommutation)ElectronicsPowerDirect-CoupledWithCoupling-Inductor7Anotherclassificationofcommutations4type

6、sofCommutationsDevicecommutationForfully-controlleddevicesElectronicsSelf-commutationForcedcommutationLinecommutationForthyristorsPowerExternalcommutationLoadcommutation82classesofinvertersVoltageSourceInverterCurrentSourceInverter(VSI)(CSI)ElectronicsPower94.24.2VV

7、oollttaaggesesoouurrceiceinnvveerrtteerr((VSVSI)I)+V3VD3VD1CV1RioLUdV2uoVD4VD2V4Electronics-FeaturesDCsideisconstantvoltage,lowimpedance(voltagesource,orbulkcap)ACsidevoltageissquarewaveorquasi-squarePowerwave.ACsidecurrentisdeterminedbytheload.Anti-paralleldiodesar

8、enecessarytoprovideenergyfeedbackpath.(freewheelingdiodes,feedbackdiodes)10Single-phasehalfbridgeVSIV1UG1UdVD21ioRLUG2UduouoUdUVDmElectron