电力电子技术双语课件第3-4章.ppt

1、Power ElectronicsChapter 3 AC to DC Converters(Rectifiers)TVTRu1u2uVTudida)0t12ttttu2uguduVT0b)c)d)e)002cos145.0)cos1(22)(sin221222dUUttdUU(3-1)u20t12tttttug0ud0id0uVT0b)c)d)e)f)+a)u1TVTu2uVTudida)b)VTRLVTRLu2u2tURitiLsin2dd2dd)sin(2)sin(22)(2dtZUeZUitLRt=，id=0(3-3)(3-2)VTia)Tu1u2uVTLRdudVDiRVDRu2ud

2、iduVTiVTIdIdt1ttttttOOOOOO-+b)c)d)e)f)g)iVDRd2dVT2)(21ItdII(3-5)(3-6)(3-7)(3-8)2IIRdVDd221()22II dtI RVDdd2IIdVTddRTu1u2i2abVT1VT3VT2VT4udittt000i2udidb)c)d)ud(id)uVT1,4a)2cos19.02cos122)(dsin21222dUUttUU2cos19.02cos12222ddRURURUI2cos145.0212ddVTRUII2sin212)(d)sin2(21222VTRUttRUI2sin21)()sin2(12222R

3、UtdtRUIITabRLa)u1u2i2VT1VT3VT2VT4udidu2OtOtOtudidi2b)OtOtuV T1,4OtOtIdIdIdIdIdiV T2,3iV T1,4cos9.0cos22)(dsin21222dUUttUU(3-15)a)b)REidudidOEudtIdOtOud0Eidtt=dmin23dmin21087.222IUIUL(3-17)a)b)u1TRu2u2i1VT1VT2ududi1OOttOb)u2OudidIdOOOOOi2IdIdIdIdIdtttttttiVT1iVD4iVT2iVD3iVDRabRLu2i2udidVT1VT2VD3VD4VD

4、RTTu2VD3VD4VT1VT2loadTRudidVT2VT1VT3u2uaubucOt1t2t3uGOudOOuabuacOiVT1uVT1tttttTRudidVT2VT1VT3u2uaubucOtOtOtOtOtuGuduabuact1iVT1uVT1uacTRudidVT2VT1VT3ttttu2uaubucOOOOuGudiVT1cos17.1cos263)(sin2321226562dUUttdUU)6cos(1675.0)6cos(1223)(sin2321262dUttdUURUIdd1-resistor load 2-inductor load 3-resistor-in

5、ductor loadabcTRLu2udeLidVT1VT2VT3udiauaubucibiciduacuabuacOtOtOtOtOtOtuVT1cos17.1cos263)(sin2321226562dUUttdUUddVT2577.031IIIIdVTVT(AV)368.057.1III2RMFM45.2UUUddbacidudVT1VT3VT5VT4VT6VT221Tnialoadu2ud1ud2u2Luduabuacuabuacubcubaucaucbuabuacuabuacubcubaucaucbuabuacuaucubt1OtOtOtOt=0iVT1uVT1ud1ud2=30i

6、aOtOtOtOtuduabuacuaubuct1uabuacubcubaucaucbuabuacuabuacubcubaucaucbuabuacuVT1=60ud1ud2uduacuacuabuabuacubcubaucaucbuabuacua ubucOtt1OtOtuVT1ud1ud2uduaubucuaubtOtOtOtOtOiaiduabuacubcubaucaucbuabuacubcubaiVT1ud1u2ud2u2LudidtOtOtOtOua=0ubuct1uabuacubcubaucaucbuabuac iVT1ud1=30ud2uduabuacubcubaucaucbuab

7、uac tOtOtOtOidiat1uaubuc=90ud1ud2uacubcubaucaucbuabuacuab uduacuabuactOtOtOubucuat1uVT1PowerElectronics31cos34.2)(sin63123232dUttdUU)3cos(134.2)(sin63232dUttdUUdd2d2d2816.03232)(3221IIIIIREUIddRUIddRabcTLudicibiaLBLBLBikVT1VT2VT3udidtOtOiciaibiciaIduaubucub-ua=2LBdia/dtik:0 Idia=Id-ik:Id 0ib=ik :0 I

8、d2ddddbakBbkBaduutiLutiLuudB0B6565B6565Bbb6565dbd23d23)(ddd23)(d)dd(23)(d)(3/21IXiLttiLttiLuutuuUIdkkk2dB62)cos(cosUIXdUdBIXdB2IXdB23IXdB3IXdB2ImX)cos(cos2Bd2UXI2Bd22UXI2dB62UIX2dB62UIXmUXIsin22Bd Single-phase full waveSingle-phase bridgeThree-phase half-waveThree-phase bridgem-pulse recfifier Circu

9、itsa)+RCu1u2i2VD1VD3VD2VD4idiCiRudb)0iud2ti,uda)b)-+RCL+u1u2i2uduLidiCiRVD2VD4VD1VD3u2udi20ti2,u2,uda)+abcTiaRCudidiCiRVD4VD6VD1VD3VD5VD2b)Oiaudiduduabuac0t3tttttiaidiaidOOOOa）RC=b）RCEMEMMR+-102udidLVT1VT2u10udu20u10OOttIdidUdEMEMiVT1iVT2iVT1iVT2iVT1iVT2iVT2id=iVT+iVT12id=iVT+iVT12iVT1iVT2iVT1Energy

10、dMUEuabuacubcubaucaucbuabuacubcubaucaucbuabuacubcubaucaucbuabuacubcuaubucuaubucuaubucuaubu2udtOtO=4=3=6=4=3=6t1t3t2Labc+-MudidEMLBLBLBVT1VT2VT3oudOOidttuaubucuaubpiVT1iVT2iVT3iVT1iVT2iVT3iVT1iVT3220V36V+BTP+15VAVS+15V-15V-15VX YDisableRQutsVD1VD2C1R2R4TSV2R5R8R6R7R3R9R10R11R12R13R14R16R15R18R17RP1uc

11、oupC2C3C3C5C6C7R1RP2V1I1cV3V4V6V5V7V8VD4VD10VD5VD6VD7VD9VD8VD15VD11VD14PowerElectronics78D,y 11D,y 5-11TRTSuAuBuCuaubuc-usa-usb-usc usa usb uscUcUsc-UsaUbUsb-Usc-UsbUaUsaUABPowerElectronicsChapter 4 DC to AC Converters(Inverters)LoadS1S2S3S4iouoUdtuoiot1t2Device commutationForced commutationLine com

12、mutationLoad commutationFor fully-controlled devicesFor thyristorsVoltage Source Inverter (VSI)Current Source Inverter (CSI)+-CRLUdV1V2V3V4VD1VD2VD3VD4uoio-RLUdiouoV1V2VD1VD2Ud2Ud2uoUmiot1t2t3t4t5t6V1V2V1V2VD1VD2VD1VD2UG1UG2+-CRLUdV1V2V3V4VD1VD2VD3VD4uoio output voltage)can be changed by changing Ud

13、.uoUmiot1t2t3t4t5t6V1V2V1V2VD1VD2VD1VD2UG1,4UG2,3VD4VD3VD4VD34343VVVVtttUu5sin513sin31sin4doddo1m27.14UUUdd1o9.022UUU tOtOtOtOtOuG1uG2uG3uG4uoiot1t2t3iouo+-CRLUdV1V2V3V4VD1VD2VD3VD4uoioLoad+-iouoUdV1V2VD1VD2For line voltageFor phase voltage of the load0WNVNUNUUUnktnntUtttttUusin)1(1sin3213sin13111si

14、n1117sin715sin51sin32ddUVddUV1m1.132UUUddUV1mUV178.062UUUU DC side is constant current,high impedance (current source,or large inductor)AC side current is quasi-square wave.AC side voltage is determined by the load.No anti-parallel diodes are needed.sometimes series diodes are needed to block reverse voltage for other power semiconductor devices.ACRLLdIdVT1VT2VT3VT4LT1LT2LT3LT4uoio load commutation.