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Wrong final result in superposition theorem 
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#1
Apr312, 01:21 AM

P: 3

I have this assignment, basically I had to do the same thing in simplified way and then superposition theorem. Apparently the answers don't match. I'm pretty sure the mistake is in superposition theorem. It could be some really stupid and simple mistake I made since I'm no good at this at all.
I'd be really grateful if anyone could help me fix it. I=U/R I1=2,2 I1=5/10 I2=0,4 I2=15/10 I3=1,8 I3=30/10 K1=I1I2+I3 K2=E1E2=I1*R1*R2 K3=E2E3=I2(R2+R3) K2=515=I1*10+I2*15 I1=10+20+15I2=30+15I2 K22=15*30=I2=(15)+I3*15 I2=15+3015+15I3=153 16I2=15I1 I2=0,938I1 I1=30+15*0,938I1 I1=30+I10,7I1 13,07I1=30 I1=2,2 I2=0,938*(2,2) I2=0,4 I3=2,2(0,4) I=1,8 R1kogu=R1+(R2*R3)/R2+R3 R1kogu=10+(15*15)/15+15=10+7,5=17,5 I1=E1/R1total=5/17,5=0,286 U1=R1*I1=17,5*0,286=5,005 I2=U2/R2 I2=0,005/15=0,0003 I3=0,02860,0003 I3=0,2867 RtotalR2=(R1*R3)/(R1+R3)=15+(10*15)/(10+15)=6+15=21 I2=15/21=0,714 U2=R2*I2=15*0,714=10,71 U1=U2=E2U2=1510,71=4,29 I3=4,29/15=0,286 I1=I2+I3=0,714+0,286 R3total=R3+(R1*R2)/(R1+R2)=15+(10*15)/(10*15)=21 I'''3=15/21=0,714 U3=R3*I'''3=15*0,714=10,71 U1=U3*E3U3=1510,71=4,29 I''2=4,29/15=0,286 I'''1=I2+I3=0,714+0,286=1 A Current: 1A, I2 = 0,286 and I3 = 0,714 So this is it, any kind of help would be greatly appreciated. Thanks for your time. 


#2
Apr312, 01:47 AM

P: 280

It is hard to help without a picture of the circuit. Could you upload one?



#3
Apr312, 02:12 AM

P: 3

Oh sorry, I completely forgot it. I attached it now to the original post.



#4
Apr312, 08:42 AM

P: 440

Wrong final result in superposition theorem
What's the question? What exactly are you looking for? Is that circuit diagram part of the original question? What is kogu?
It would also help not writing equations like this: I1=10+20+15I2=30+15I2 The 15*I2 can be mistaken for 1512. I don't mean to be rude, but most of that is not very easy to follow at all. If you did the actual question like that, it could be why you're getting an error somewhere. 


#5
Apr312, 09:57 AM

P: 3

"Kogu" means total. The assignment isn't in english. I copied it directly from a word document, so the format got messed up a bit. I'll try to make it more readable.
Yes, this circuit diagram came with the assignment. I need help finding an error, the final result is incorrect. 


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