two-switch forward converter

[arr_baobao]

hi guys... i'm currently doing a project on two-switch forward converter power supply.
with the circuit diagram given, i have to design/decide the value of the components for the transformer and the output filter part.
i had went through few books and search online but non of them have details explanation and derivation of two-switch forward converter formula, most of them just focus of the single switch forward converter.
so anyone here can help me or provide me some useful links regarding the two-switch forward converter
hope to hear from u guys soon.

thanks!

 

[hanif]

check these

LM5015 High Voltage Monolithic Two - Switch Forward DC-DC ...

https://www.google.com.pk/url?sa=t&...sg=AFQjCNHrWPkXTIGg6NG7k2Y5utxbHiu74A&cad=rja

**broken link removed**

IEEE EXPLORER --A novel two switch forward converter with two transformers and LLC circuit

7 .9 The forward converter

https://www.google.com.pk/url?sa=t&...sg=AFQjCNEW0mjx4Q-fkvBIsomMaGE3nkDRnw&cad=rja

 

[arr_baobao]

parameter for my two-switch forward converter:
input voltage range = 100-240v AC
output voltage=48v, Po=500w;
switching frequency=100KHz

anyone can help me to calculate the value for the output inductor and the transformer N1 and N2 value?

 

[FvM]

Calculation is identical to a basic forward converter, except for the below 50% maximum duty cycle. Assume e.g. 48% at 100 V input voltage. Unfortunately, the duty cycle at 240V will be uncomfortably low, that's the price of a dual switch converter.

 

[arr_baobao]

can u provide me some links with details explanation like circuit description or operation and the derivation of the formula for the two-switch forward converter?
as i said before, went through few books and online research papers, non of them really have all the details explanations.
i really wanna study into deep every bits of the converter.

 

[FvM]

I've read in a forum discussion, that older textbooks (e.g. from 70th or 80th) often discussed the two-switch converter. But I'm not aware of an example. In opinion, the behaviour can be easily derived.

 

[arr_baobao]

i dont get u. what textbooks u refer to. can i hav the name or link?
thanks

 

[neonwarrior]

Here...
**broken link removed**
And click http://www.smps.us/Unitrode2.html for more info