电力电子技术英文版 chapter10

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1、PPoowwererEEllececttrronionicscsChapter10ApplicationofPowerElectronicsAApppplicalicattiiononofofPPoowweerrEEleclecttrrononicsics10.1DCmotordrivers(thyristor-DCmotorsystem)10.2FrequencyconvertersandACdrivers10.3UninterruptiblePowerSupply(UPS)10.4SwitchingPowerSupply

2、Electronics10.5Powerfactorcorrection(PFC)10.6Applicationinutilitypowersystem10.7OtherapplicationsPower210.1DC10.1DCmmotootorrddrriivveersrs((TThhyyrrisistortor--DCDCmomottoorrssyysstteemm))10.1.1Rectifiermodeofoperation10.1.2Invertermodeofoperation10.1.3ReversibleD

3、CmotordrivesystemElectronics(four-quadrantoperation)LBVTa1iTv1LBVTLb2iTv2LBiVTdPowerc3+iTv3udMEM-o310.1.1RectifiermodeofoperationuuuuuWaveformsandequationsdabcdUdUd=EM+RåId+DUiREdOwt(10-1)aElectronicswhere3idiciaibicXBRå=RB+RM+2pOwtPower(for3-phasehalf-wave)Wavefor

4、msof3-phasehalf-waverectifierwithDCmotorload4Speed-torque(mechanic)characteristicswhenloadcurrentiscontinuousEM=Cen(10-2)For3-phasehalf-wave3XIn(R+R+B)dUd=1.17U2cosaBM2pCeEM=1.17U2cosa-RåId-DUaElectronics1(10-3)a21.17U2cosaRåId+DUan=-3a

5、-phasebridgeFor3-phasehalf-wave2.34UR2cosaånI=-d(10-5)CCee5Speed-torque(mechanic)characteristicswhenloadcurrentisdiscontinuousEMFatnoload(taking3-phasehalf-waveasanexample)EFora£60ºE0Electronics(2U2)E0=2U2E'0Fora>60º(0.585U2)oE0=2U2cos(a-60)IPowerdminOdiscontinuout

6、sImodecontinuousmodedFor3-phasehalf-wave6Speed-torque(mechanic)characteristicwhenloadcurrentisdiscontinuousFordifferentaEboundaryThepointofEMFatnoE0loadisraisedup.a1Electronicsa2a3a4Thedroopratebecomesasteeper.(softerthanthe5discontinuouscontinuousmodePowercontinuo

7、usmode)modeOIdFor3-phasehalf-wave(aa>60º)12354710.1.2InvertermodeofoperationEquationsnrectifiermode–arejustthesameasinthearectifiermodeofoperation1aexceptthatUd,EMandn2abecomenegative.E.g.,in3increasng3-phasehalf-waveaaElectronics4pEMd=1.17U2cosa-RåIU-Da

8、=b=2Idb(10-3)4b3increasng1.17U2cosaRåId+DUbn=-2binverterbCeCe1modePower–Orinanotherform(10-4)Speed-torquecharacteristicsofEM=-(Ud0cosb+IdRå)(10-1