Fly back converter please help me....

i have designed a fly back converter according to a book- switching power supply design by abraham i. pressman, keith billings, taylor morey.

i have to simulate this designed fly back converter in matlab simulink.
now my first doubt is;
a) i am using a multi winding transformer in place of fly back transformer. is that correct?
b) the design parameters are not utilized in this multiwinding transformer. for eg: there is no way i can feed the turns ratio of the transformer. i hope my doubt is clear to all of u.
c) in the block parameters of multiwinding transformer as soon as i enter the value of r1,r2 o l1,l2 or lm, rm the output becomes inversely reducing. whereas if the all these values are 0 i get the correct output.

please tell wat mistake i am doing.......
the design parameters are:
Po=2Kw
Vo=380V
Vi=80-100V
Fs=40Khz
turn's ratio=1.3123
Ton=13.82 usec
T=20 usec
Lp=12.20uH
Co=115.26uF
Ro=72.2Ω

Post a schematic.

i have attached the matlab simulink.
wat do u think is the problem crutschow sir?

Can you post a schematic and give some idea about the application. I think you need a proper schematic and a paper design before jumping into simulations.

I can't open simulink files as I don't have matlab.

I agree with vegeta. You need a design before you do the simulation.

crutschow said:

Post a schematic.

Click to expand...

Build a breadboard.

nup said:

i have designed a fly back converter according to a book-
Po=2Kw
Vo=380V
Vi=80-100V

Click to expand...

Designing a 2kW flyback converter from a book......

first off, a 2kW flyback isn't feasible. Your best hope is to use an H bridge design.

i am designing a 2KW stand alone PV system in which this fly back converter is used.

the schematic.. values already mentioned

@ bountyhunter..
yes u were right. my prof told about that today.

bountyhunter said:

Designing a 2kW flyback converter from a book......

first off, a 2kW flyback isn't feasible. Your best hope is to use an H bridge design.

Click to expand...

can i get details of the book mentioned by you

The "book" was not mentioned by me it was from this post:

Originally Posted by nup
i have designed a fly back converter according to a book-

Click to expand...