搜索
,,(,350002):RC,PWM,LC,,:;/;:TN86:A:1000-100X(2001)03-0024-03TheSoftSnubberTechnologyforFlybackSwitch2modePowerSupplyLINZhou2bu,ZHANGWen2xiong,LINYuan2zun(FuzhouUniversity,Fuzhou350002,China)Abstract:AnewtechnologycalledsoftsnubbercircuitwhichisdifferentfromRCsnubbercircuitisproposed.Com2binedwithcurrent2modePWMcontrol,itcansnubthetransientofswitchingofftheinductiveloadandremovethebadreverserecoveryfeatureofthediodebytheLCresonantcircuitconstructedofadditionalsmallcapacitorsandthecouplinginductorinflybackconverterwithhighratioofperformancestocost.Thecircuitanalysis,computersimulationandexper2imentalresultsverifiedthatthetechnologyisapplicable.Keywords:converter;snubber/flyback;switch2modepowersupply1,,,,,,1,RC,,,,,,,,,,,:,:A0010007:2001-01-16:2001-03-28:(19522),,,,,,,1,200kHz,60kHz,,FLYBACK[1],,,,,,1RCDRC,,MOSFET,,,(5W),,,,,,[2],,,4235320016PowerElectronicsVol.35,No.3June,2001©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.;,[3],,,,,,,,,,,,,,,[4],,,,,,,,PWM,12,,,,()(0.5LLEAKIM2),,UL=LLEAKdi/dt,,,,1:LLEAK=0.045mH,IM=1.7A,f=58.8kHz,PL=0.5LLEAKIM2f=3.8W,67W,,5.67%,,,,,,LC,,,,,,LCL,C,,,C(),(),PWM,,2C2(680pF)C4(470pF),R122k82k,5W2W,RC,C110nF4.7nF0.955mH1.45mH,5A4A(f=52kHz)PWM,PWM,,,52©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2Flyback2,2(t0-t1)(t1-t2)(t2-t3)(t3-t4)33FlybackVT1,C4,VD2,C4C2;VT1,C4C2,LC,R1,,,C2C4PWMVT1,LCVT1TX1VD2,,VT1,,312PSPICE,454152,:,220V,VT12UdsId6761726,IdR13(0.1),(50)6235320016PowerElectronicsVol.35,No.3June,2001©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.Rs=0.687,Rr=0.842,Ls=83.97mH,Lr=85.28mH,M=81.36mH,J=0.03Ns2m,Te=12Nm,ne=1500r/min150rad/s,5,325rad/s23,4(a)(b)(c)a(24s)(d)a(46s)44a4b4c4da,,,:[1]MarinoR.etal.AdaptiveInput2outputLin2earizingControlofInductionMotors[J].IEEETrans.onAutomat.Contr.,1993,38(2):208221.[2]SastryS.S.etal.AdaptiveControlofLineariz2ableSystems[J].IEEETrans.onAutomat.Control,1989,34(11):11231131.[3],.PWM[J]..1994(1):5056.[4],..[J].1996(12):712.[5],.[M].:,1999:394395.[6].[J].,1996(6):1819.(26)Idm1.7A7,IdR13(0.33),Idm1.3A7,,2,,6,7,,,,12,:74%;78%:15.4W;23.4W4PWM,,,,,,,,:[1].KX2F50B[J].,1996(10):3031.[2].[M].:,1992.[3]MarkK.etal.AComparisonofVoltage2ModeSoft2SwitchingMethodsforPWMConverters[J].IEEETrans.onPowerElectronics,1997,12(2):376386.[4]ChungH.Sh.H.etal.AZero2Current2SwitchingPWMFlybackConverterwithaSimpleAuxiliatySwitch[J].IEEETrans.onPowerElectronics,1999,14(2):329341.0535320016PowerElectronicsVol.35,No.3June,2001©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.