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开关电源变压器设计问题,高手指教

  现做款开关电源。输出功率7W,最大占空比我设为0.48,采用锰锌铁氧体磁芯EE16,85-265宽压输入,原边反馈电压20V用来供电。下面是我的变压器设计参数和图。请高手指教下,是否正确。或者存在什么问题。小弟非常感谢。

看我计算是否正确:

Ap=1.41PoTonl/(BmJKw)=1.41*7w*(1/65K)*0.48/(0.5T*5A/MM2*0.4)
    =0.0074 CM4      EE16 PC40磁芯
Ip=2Po/(Dmax*Vimin) = 0.324   
Lp=Vimin*Dmax/(Ipk*f)=90*0.48/0.324*65k=2.06MH
N原级=Lp*Ip/Ae*dB=2MH*324MA/(19.2M*M*0.16T)=211匝
N次级=(Vo+Vd)*(1-Dmax)*Np/(Vimin*Dmax)=75匝
N副=25*N原/(90*Dmax)=96匝

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2011-04-02 10:02

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xjl1012
LV.3
3
2011-04-08 10:33
可能错了  不能那么多匝数的
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