controlled full-wave rectifier

Discussion in 'Homework Help' started by notoriusjt2, Oct 4, 2010.

  1. notoriusjt2

    Thread Starter Member

    Feb 4, 2010
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    0
    [​IMG]
    Vo=(Vm/pi)(1+cos(α))=54.02(1.707)=92.21v
    Io=Vo/R=4.611a
    Irms=(Vm/R)((1/2)-(α/2pi)+((sin(2α))/4pi))^0.5
    =(169.7/20)((1/2)-(.785/2pi)+(sin(1.571))/4pi)^0.5
    =(8.485)(.6142)
    =5.21A
    P=(Irms^2)*R
    P=542.9w

    α=45deg=.7854rad

    ok what did i forget to do here
     
  2. The Electrician

    AAC Fanatic!

    Oct 9, 2007
    2,284
    328
    You haven't calculated the RMS values correctly. See the attachment for the calculation of the RMS voltage across the 20Ω resistor, and the RMS current through that resistor.

    I haven't taken into account the on voltage across the SCRs which would cause the power to be a little less.
     
  3. notoriusjt2

    Thread Starter Member

    Feb 4, 2010
    209
    0
    thank you... which computer program is that?
     
  4. The Electrician

    AAC Fanatic!

    Oct 9, 2007
    2,284
    328
    It's Mathematica. There are numerous other programs that can do that sort of thing, such as Matlab, Mathcad, Maple, Scilab, etc.
     
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