Fly back converter please help me....

Discussion in 'The Projects Forum' started by nup, Sep 11, 2012.

  1. nup

    Thread Starter New Member

    Sep 10, 2012
    15
    0
    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
     
  2. crutschow

    Expert

    Mar 14, 2008
    13,013
    3,233
    Post a schematic.
     
  3. nup

    Thread Starter New Member

    Sep 10, 2012
    15
    0
    i have attached the matlab simulink.
    wat do u think is the problem crutschow sir?
     
  4. vegeta

    New Member

    Sep 7, 2012
    6
    0
    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.
     
  5. crutschow

    Expert

    Mar 14, 2008
    13,013
    3,233
    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.
     
  6. bountyhunter

    Well-Known Member

    Sep 7, 2009
    2,498
    507
    Build a breadboard.
     
  7. bountyhunter

    Well-Known Member

    Sep 7, 2009
    2,498
    507
    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.
     
  8. nup

    Thread Starter New Member

    Sep 10, 2012
    15
    0
    i am designing a 2KW stand alone PV system in which this fly back converter is used.
     
  9. nup

    Thread Starter New Member

    Sep 10, 2012
    15
    0
    the schematic.. values already mentioned
     
  10. nup

    Thread Starter New Member

    Sep 10, 2012
    15
    0
    @ bountyhunter..
    yes u were right. my prof told about that today.:)
     
  11. suraj1989kav

    New Member

    May 26, 2013
    1
    0

    can i get details of the book mentioned by you
     
  12. bountyhunter

    Well-Known Member

    Sep 7, 2009
    2,498
    507
    The "book" was not mentioned by me it was from this post:

     
Loading...