AP=4.3262cm⁴ Ae=194 mm²Aw=223mm² Ve=19163mm³

AL=4690±25% Pt=433W (100KHz 25℃)

4、計(jì)算Np Ns.

(1).計(jì)算匝比n = Np /Ns 設(shè)Dmax= 0.4

n = Np / Ns = Vi / Vo = [Vin(min)×Dmax]/ (Vo+Vf)

Vf :二極管正向壓降取1V

Vin(min)=180×0.9×√2-20=209 VDC

Vin(max)=260×√2=370VDC

n=(209*0.4)/(13.8+0.7)=5.766取5.5

CHECK Dmax

Dmax=n(Vo+Vf)/Vin(min)= 5.5

(13.8+1)/209=0.3868≈0.387

Dmin=n(Vo+Vf)/Vin(max)= 5.5

(13.8+1) /370=0.218

(2).計(jì)算Np

Np=Vin(min)×ton/(ΔB×Ae)

Ton：MOS管導(dǎo)通時(shí)間 ton= Dmax/ fs＝0.387/60×10³＝6.33uS

Np = (209×6.33)/( 0.20×194)=34.1取34TS

(3).計(jì)算Ns

Ns = Np / n = 34÷5.5＝6.18取整為6 TS

(4). CHECK Np（以Ns驗(yàn)算Np)

Np = Ns×n = 6×5 .5=33TS 取Np = 33TS

(5).確定N_R