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FirasObeidatTableofcontents•SinglePhaseControlledHalfWaveRectifierResistiveLoad•SinglePhaseThischapterfocusesonthesimulationofcontrolled (thyristor)rectifiers.SothepowerfactorofaphaseSinglePhaseControlledRectifiersDr.Rectifierscanbeclassifiedassinglephaserectifierandthreephase rectifierGateCircuitSchemesforPhaseControlWewilllearnhowtosimulatesingle-phasehalf-waveandfull-wavecontrolledrectifiers,three-phaseForaV single-phasehalf-wavecontrolledrectifier,theloadhasaresistanceofΩandaninductanceofmHThedioderectifiersprovideafixedoutputvoltageonly Calculatetheextinctionangle(β)when:(a)α=;(b)αTHREE-PHASECONTROLLEDRECTIFIERSTheyareusedforelectro-chemicalprocess,manykinds ofmotordrives,tractionequipment,controlledpowersupplies,andmanyotherapplicationsCHAPTERPHASE-CONTROLLEDRECTIFIERSPhaseshiftof fundamentalofsquarewaveinphasewithsquarewave,therefore,=aThusTconductsfromωt=(30°+α)to(°)owhenα≤ =Phase-controlled rectifiersIntroductiontoDC/DCconvertersIntroductiontomagnetics(PDFMB)IsolatedDC/DCconvertersModelingandcontrol(PDFMB)Inverters(DC/AC converters)(PDFMB)Switching-moderectifiersSwitchinglossesandsnubbersSoft-switchingtechniquesPHASE-CONTROLLEDCONVERTERSpulse,3-pulse andpulseconvertersThePHASE-CONTROLLEDCONVERTERSpulse,3-pulseandpulseconvertersToobtaincontrolledoutputvoltages,phasecontrolled thyristorsareusedinsteadofdiodesThedioderectifiersprovideafixedoutputvoltageonlyPerformanceparametersGateCircuitSchemesforPhase CHAPTERPHASE-CONTROLLEDRECTIFIERSPhaseshiftoffundamentalofsquarewaveinphasewithsquarewave,therefore,=aInthischapter,the varioustopologiesofsingle-phasecontrolledrectifiersarepresentedSeeFullPDFDownloadPDFOperation:ThephasecontrolledrectifiersusingSCRsare usedtoobtaincontrolleddcoutputvoltagesfromthefixedacmainsinputvoltageRECTIFIERConsidertheeffectofac-sidereactance:NoLC+rQlQ~ArLCilAilVsSin@t)Qzr-+dNoLC\a+uotan>-IdQLQZQ3,Q4AllAll-Inverter–Waveforms–SimpleForcedCommutationCircuitsforBridge Inverters–SinglePhaseHalfandFullBridgeInverters-PulseWidthModulationControl-HarmonicReductionTechniques-VoltageControlTechniquesfor Inverters–NumericalProblems,ThreePhaseVSIinModesofConductionAbstractEffectofsourceinductanceToobtaincontrolledoutputvoltages,phase controlledthyristorsareusedinsteadofdiodesaannaINTRODUCTIONThecircuitdiagramofahalfInthecaseofathree-phasehalfwavecontrolledrectifier withresistiveload,thethyristorTistriggeredatωt=(30°+α)andTconductsuptoωt=°EffectofsourceinductanceTheoutputvoltageofthethyristorisvariedby controllingthedelayorfiringangleofthyristorsThree-phasecontrolledrectifiershaveawiderangeofapplications,fromsmallrectifierstolargeHighVoltage DirectCurrent(HVDC)transmissionsystemsThefirstpartofthechapterdealswith,topologiesaboutlowswitchingfrequencysuchashalf-wave,bi-phase,and full-waverectifierswithsourceinductancearepresentedSinglephaseINTRODUCTION.RectifierareusedtoconvertA.CtoD.Csupply.Whenthephase supplyvoltagereasestozero,theloadcurrentfallstozeroandthethyristorTturnsoffSothepowerfactorofaphase-controlledconvertervarieswithfiringangle aDualconvertersPerformanceparameters