Fly-back トランス設計方法 Design tool

1 Design tool Fuji Electric Co., Ltd. All rights ,2016 vs Fly-back 11 Fly-back Excel 2 Fly-back 3 ( ) RsVacfacQ1 NvccLp,NpNsD1,VFVo,IoIFVdsIdCinVdcVccVdV dsIdIFtofftonVdsIdIFtofftonVdsIdIFtoffto n Fuji Electric Co., Ltd. All rights transformer DesignJuly,2016 VoVdc ( )IoAdc IolpAdc VacVacMin,Max facHzMin % fswkHz CinuF2 VFVFVdc BT lemm2 AeMm a VrVdcMOSFET ( )VsgmVdc2 ( )VsgdVdc Vin(cr),Vin(cc)Adc Io(cr),Io(cc)Adc ( )k5 PoWPo,Polp ( )VrippleVdcVripple,Vripple(olp) Vdc(min)VdcVdc(min),Vdcolp)min) Vdc(max)Vdc PinWPin,Pinolp TusT,TonMOSFET Vds(max)Vdc2 Vd(max)VdcDutyD1 LpuH1 NpTn2 NsTnVCC NvccTn lgmm1 IpeakA1 ( )IprmsArms2 ( )IsrmsArms ( )IcrmsArms BcT Fuji Electric Co.

2 , Ltd. All rights transformer DesignJuly,2016 Step Step-0 ( ) Step-1 Parameter Step-2 Flyback MOSFET 2 Step-3 Step-4 or Step-5 Duty Lp Step-4 Duty,Lp Step-6D(max) OLP Duty Step-7 Ipeak Step-4 Lp Duty 1 Ipeak Step-82 Ns Lp,Ipeak 2 Ns Step-91 Np 2 1 Np Step-10 VCC Nvcc VCC 2 VCC Nvcc Step-11 Gap Lp gap Step-12 Step-13 ( ) ( ) 1 2 ( ) Step-14 Duty Fuji Electric Co., Ltd. All rights transformer DesignJuly,2016 Step-0 : Step-1 : Parameter Step-2 : Flyback MOSFET 2 Vr Vsgm,Vsgd (30V ) (AC90V AC264V) 600V 900V 600V 80~110V VsgdVdcVrVFVoVoVdVsgmVdcVrVds (max)(max)(max)(max)Step-3 : n VFVoVrNsNpn GNDV inrippleVdc(min)Vdcolp(min)Vac 2 Vds VrGNDVdcVsgm Fuji Electric Co.

3 , Ltd. All rights transformer DesignJuly,2016 : or k IpeakIpeakk1 Step-5 : Duty,Lp Step-4 1 Lp Lp fswDutyTonVrVdcVrDuty PinfswTonVindcLp 222 PinfswTonVdckkLp 21122 Step-6 : D(max) Duty Duty ( ) Duty fswDTonVrVdcolpVrD(max)(max)(min)(max) Step-7 : Ip(peak) 1 LpkTonVdcolppeakIpfswTonVdcolpPinolpLpfs wTonVdcolpPinolpLpk (max))1((max)(min))((max)(min)2(max)(min )2(max)2222Id AIpeakIpeak1 Fuji Electric Co., Ltd. All rights transformer DesignJuly,2016 : 2 Ns AeBmnIpeakLpNs 2 Step-9: 1 Ns NsnNp 1 Step-10: VCC Nvcc NsVFVoVccNvcc VCC IC Vcc VCC VCC Step-11: gap cleLpAeNpgap 20 gap gap L Step-12: gapleIpNpBc 0 L Parameter )(VFVoNsNpVr Fuji Electric Co.

4 , Ltd. All rights transformer DesignJuly,2016 : ( )fswDTonVdcVrVrD (min) 1 2 ( ) 2222)3()1()3(IoIsrmsIcrmsIsbIspIspDIsrms IpbIpIpDIprsm 2 Im12 Im ImIpeanIpeakIpeanIpeakfLpDVdcIpDVdcPinea n Step-14: IC [V]Id [A]DutyDuty vs. Id VdsIdVdsVds IdIFIpeakIpeak1 IspeakIspeak1 Imean Ip Fuji Electric Co., Ltd. All rights transformer DesignJuly,2016 1. 2016 7 2. 3.