# controlled full-wave rectifier

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

1. ### notoriusjt2 Thread Starter Member

Feb 4, 2010
209
0

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

ok what did i forget to do here

2. ### The Electrician AAC Fanatic!

Oct 9, 2007
2,300
335
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.

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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
2,300
335
It's Mathematica. There are numerous other programs that can do that sort of thing, such as Matlab, Mathcad, Maple, Scilab, etc.