电力电子技术英文版 chapter06new

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1、PPoowwererEEllececttrronionicscsChapter6ACtoACConverters(ACControllersandFrequencyConverters)ClassiClassifficaicattiiononooffAACCtotoAACCccoonnvveerrtteersrsVariableSamefrequencyfrequencyvariablemagnitudeACpowerACpowerACpowerElectronicsACcontrollersFre

2、quencyconvertersPower(Cycloconverters)ACtoACconverters2ClassiClassifficaicattiiononooffAACCccoonnttrroollellersrsPhasecontrol:ACvoltagecontroller(Delayanglecontrol)Integralcyclecontrol:ACpowercontrollerElectronicsACcontrollerPWMcontrol:ACchopper(Choppi

3、ngcontrol)PowerOn/offswitch:electronicACswitchPWM:PulseWidthModulation3ClassiClassifficaicattiiononooffffrreeququeennccyyccononvveerrtteersrsPhasecontrol:thyristorcycloconverter(Delayanglecontrol)Frequencyconverter(Cycloconverter)PWMcontrol:matrixconve

4、rterElectronics(Choppingcontrol)Cycloconverterissometimesreferredto–inabroadersense—anyordinaryACtoACconverterPower–inanarrowersense—thyristorcycloconverter4OuOuttlliinene6.1ACvoltagecontrollers6.2OtherACcontrollersElectronics6.3Thyristorcycloconverter

5、s6.4MatrixconvertersPower56.16.1AACCvvoollttaaggeeccontontrroollellersrs6.1.1Single-phaseACvoltagecontroller6.1.2Three-phaseACvoltagecontrollerElectronicsApplicationsLightingcontrolSoft-startofasynchronousmotorsAdjustablespeeddriveofasynchronousmotorsP

6、owerReactivepowercontrol66.1.1Single-phaseACvoltagecontrollerResistiveloadu1VT1ioOwtuoVT2Electronicsu1uoROwtioOwtuPowerVTThephaseshiftrange(operationrangeofphaseOwtdelayangle):0£a£p7Resistiveload,quantitativeanalysisRMSvalueofoutputvoltage1p21p-aU=(2Us

7、inwt)d(wt)=Usin2a+(6-1)oò11pa2ppRMSvalueofoutputcurrentUoI=Electronicso(6-2)RRMSvalueofthyristorcurrent21pæ2UsinwtöU1asin2aI=ç1÷d(wt)=1(1-+)(6-3)T2pòaçR÷R2p2pèøPowerPowerfactorofthecircuitPUIU1p-al==oo=o=sin2a+(6-4)SUIU2pp1o18Inductive(Inductor-resisto

8、r)load,operationprincipleu1VT1Owtio0.6uG1OwtuVT2G2Electronicsu1uoROwtuoOwtioThephaseshiftrange:PowerOwtuj£a£pVTOwt9Inductiveload,quantitativeanalysisDifferentialequationdi180joL+Ri=2Usinwt6075=9045o130°°15°dt0°°°°i=0(6-5)140owt=a)100Sol