断续模式反激变压器设计几个问题

41DesignRelationsofFlybackTransformerOperatinginDiscontinuous-ModeFangYuZhaoXiukeCollegeofAutomatizationNanjingUniversityofAeronautic&AstronauticNanjing210016100WRCD(1a),(1b)SSDdtdiLU11(1a)TontLUi111Ton(1a)111ponIULT(1b)111onpUTIL(2)()1112piIDPIU(3)DTon/TT111.153ipIDIID4UiDUoUzU1U2L1L2CTUgSugsi1I1pI1i2I2pTI2TonTR1Tof42L12211pmILWfILPp211121(5a)2(5a)12112)(fLDUP(5b)11iRUUUUiUR15bU1DDmaxkDmax/kD1TofTR1(b)(1b)222pRIULT(6)TR2222222()122RpUDPLIffL(7)RRTDT22oDRUUUUUDUR27L2DRI2p22RpoooDIUPI(8)RopDII22(9)RoRRoRpDIDDIDII15.13232210DR(9)T212112TTUDPPfL11(11)7TRDUDULLn2121(12)432aD12'1nUU(13)DzspszTILUU1'1LsUz'1UTs2(b)'11UUILTzpss(14)Ts2'111''11()122zpspszLsszzUILIfTUUPPTUUUU(15)PsPU1fILPpss2121'11'111UsszUPPPUU'1/zUU12,(5b)1511LssiPLkPL(16)1PkPPii(17)3b14fLDUkPkPPTi121212)()1(1(18)(7)18)1(2121kDUDULLnTR(19)19DDR1nD/DR410D/DRD/DRDmaxDRmax19(a)I1pI2pTs(b)244DmaxDRmax0.90[1]U1U2DmaxDRmax0.951%16kDmaxDRmaxnmaxCEizUUUmax1.2izBRUUU2080%20Uz=1.6UimaxUimax=0.6Uimax(12)U1=nU2=UiminDmax/DRmaxmaxmaxminmax0.6iRiUDUD21maxiRoUUUn2222n1.50V10V2.Dmax+DRmax13.Uimax/Uimin3.3100V370V3.7750V212.22Dmax/DRmaxDmaxDRmax0.45Uz2Uimin=200V(16)k4.DmaxDRmax0.4518Dmax/3.7=0.12100kHz1.2s50kHz70kHz5.Uimax/Uimin2190~370V750V211.172Dmax/DRmaxDmaxDRmax0.451200V220VDmax0.3DRmax0.619n422456.,7.UiDDRDmax0.35DRmax0.6n8.RCDRCD2cLsURP4TCR4**1])2()2[(**21*44222CLSCLSCCLSCUUcfPUcUCfPUcUUcUCfPURTCT1/fsRI1pPLs1516Uc9.100mW/cm3B50kHz100mW/cm3B120mTBm2B[2]BmBs10.BmBmAL100011.10W4.55A/mm25ADowell[2]1Abraham.l.PressmanSwitchingPowerSupplyDesignSecondEditionMcGraw-HillNewYork199822002