关于占空比的资料
我现在是刚学电源,有很多知识都不知道,就象占空比的问题,我不知道怎么样来确定它,不知道在电路中怎么样设置它呢?
关于占空比的资料
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@zzysccd
我也请教一下具体说,我现在用3842设计单端反激型电源,设计变压器绕组时先算原边电感量,算这个电感量就要设计占空比D,如果象你说的不用我们设置,那我该取什么值来算电感量呢???
for reference
we must set a Dmax first when we design a transformer.
Lp=VinDT/(Ipk-Imin),
Vinmin corresponds Dmin,Vinmax corresponds Dmax.
But in real circuit,maybe Dmax is not just the value you assumed.so the variation of Duty just changes the value of (Ipk-Imin),Lp is designed out to be a constant parameter.
we must set a Dmax first when we design a transformer.
Lp=VinDT/(Ipk-Imin),
Vinmin corresponds Dmin,Vinmax corresponds Dmax.
But in real circuit,maybe Dmax is not just the value you assumed.so the variation of Duty just changes the value of (Ipk-Imin),Lp is designed out to be a constant parameter.
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@yakyao
占空比各种电源的占空比决定的参数应该不一样吧,我接触的开关电源都是由输入电压和输出电压决定的.考虑到电压变化范围,瞬态响应,启动等问题,决定最大占空比.
how it works?
考虑到电压变化范围,瞬态响应,启动等问题,决定最大占空比.
could you explain it in detail?
I think if duty is too large,it is harmful to Vds(br),Idiode.
if duty is too small, it is harmful to Ids, Vdiode
just for reference.
考虑到电压变化范围,瞬态响应,启动等问题,决定最大占空比.
could you explain it in detail?
I think if duty is too large,it is harmful to Vds(br),Idiode.
if duty is too small, it is harmful to Ids, Vdiode
just for reference.
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@smps
forreferencewemustsetaDmaxfirstwhenwedesignatransformer.Lp=VinDT/(Ipk-Imin),VinmincorrespondsDmin,VinmaxcorrespondsDmax.Butinrealcircuit,maybeDmaxisnotjustthevalueyouassumed.sothevariationofDutyjustchangesthevalueof(Ipk-Imin),Lpisdesignedouttobeaconstantparameter.
糊涂
麻烦解释一下Vinmin和Dmin的关系,Vinmin是否输入的最低电压
麻烦解释一下Vinmin和Dmin的关系,Vinmin是否输入的最低电压
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