电力电子技术（第5版）(英文版)课件：整流电路.pptx

PowerElectronics整流电路ACtoDCConverters(Rectifiers)

Outline3.1Single-phasecontrolledrectifier3.2Three-phasecontrolledrectifier3.3Effectoftransformerleakageinductanceon

rectifiercircuits3.4Capacitor-filtereduncontrolledrectifier3.5Harmonicsandpowerfactorofrectifiercircuits3.6Highpowercontrolledrectifier3.7Invertermodeoperationofrectifiercircuit3.8Realizationofphase-controlinrectifiercircuits

3.1Single-phasecontrolled

(controllable)rectifier3.1.1Single-phasehalf-wavecontrolledrectifier3.1.2Single-phasebridgefully-controlledrectifier3.1.3Single-phasefull-wavecontrolledrectifier3.1.4Single-phasebridgehalf-controlledrectifier

3.1.1Single-phasehalf-wave

controlledrectifierHalf-wave,single-pulseTriggeringdelayangle,delayangle,firingangleResistiveload(3-1)

3.1.1Single-phasehalf-wave

controlledrectifierInductive(resistor-inductor)load

Basicthoughtprocessoftime-domainanalysisforpowerelectroniccircuitsThetime-domainbehaviorofapowerelectroniccircuitisactuallythecombinationofconsecutivetransientsofthedifferentlinearcircuitswhenthepowersemiconductordevicesareindifferentstates.ωt=a，id=0(3-3)(3-2)

Single-phasehalf-wavecontrolledrectifierwithfreewheelingdiodeMaximumforwardvoltage,maximumreversevoltageDisadvantages:OnlysinglepulseinonelinecycleDCcomponentinthetransformercurrentInductiveload(Lislargeenough)VTia)Tu1u2uVTLRdudVDiRVDR(3-5)(3-6)(3-7)(3-8)

3.1.2Single-phasebridge

fully-controlledrectifierForthyristor:maximumforwardvoltage,maximumreversevoltageAdvantages:2pulsesinonelinecycleNoDCcomponentinthetransformercurrentResistiveloaddRTu1u2i2abVT1VT3VT2VT4udia)

3.1.2Single-phasebridgefully-

controlledrectifierResistiveloadAverageoutput(rectified)voltage (3-9)Ave