關于占空比的資料
我現在是剛學電源,有很多知識都不知道,就象占空比的問題,我不知道怎么樣來確定它,不知道在電路中怎么樣設置它呢?
關于占空比的資料
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@zzysccd
我也請教一下具體說,我現在用3842設計單端反激型電源,設計變壓器繞組時先算原邊電感量,算這個電感量就要設計占空比D,如果象你說的不用我們設置,那我該取什么值來算電感量呢???
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
占空比各種電源的占空比決定的參數應該不一樣吧,我接觸的開關電源都是由輸入電壓和輸出電壓決定的.考慮到電壓變化范圍,瞬態響應,啟動等問題,決定最大占空比.
how it works?
考慮到電壓變化范圍,瞬態響應,啟動等問題,決定最大占空比.
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.
考慮到電壓變化范圍,瞬態響應,啟動等問題,決定最大占空比.
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
麻煩解釋一下Vinmin和Dmin的關系,Vinmin是否輸入的最低電壓
麻煩解釋一下Vinmin和Dmin的關系,Vinmin是否輸入的最低電壓
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