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Node voltage Analysis with voltage controlled voltage source

by forsaken231
Tags: analysis, controlled, node, source, voltage
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Sep2-11, 03:09 AM
P: 3
1. The problem statement, all variables and given/known data
Here is the circuit

3. The attempt at a solution
I've tried it a few ways, but the one I'm going for at the moment is this

Node 1: (v1-v2)/10 + (v1-v3)/15 + v1 /5 = 1
Node 2: (v2-v1)/10 + (v2-v3)/10 + v2 / 5 = 2
Node 3: 2Vx where Vx = (v2 - v1)/10

When I solve I don't get the correct answers:
Node 1: 5.405V and Node 2: 7.297V

I tried doing equations without a 'node 3' involved but they just didnt work out either. If i DO only need to use 2, please explain to me how to do so, I'm really stuck :(
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Sep2-11, 04:23 AM
PF Gold
P: 1,053
Don't have time to dive into this thing yet, but this is not helping:
Node 3: 2Vx where Vx = (v2 - v1)/10
should be vx = v2 - v1
Sep2-11, 05:05 AM
P: 3
You're a lifesaver, figured it out.
It's always the small things that get me, stupid dependency equations.

Thank you :)

rude man
Sep2-11, 02:55 PM
HW Helper
PF Gold
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P: 4,841
Node voltage Analysis with voltage controlled voltage source

I assume you dug up the 4th equation? 4 unknowns need 4 equations: v1, v2, v3, vx.
Of course, the 4th is obvious ....
Sep3-11, 05:13 AM
P: 3
haha i had the 4th equation i just wrote it wrong >.<

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