- #1
julz127
- 13
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Homework Statement
[PLAIN]http://img718.imageshack.us/img718/3519/circuith.png
This is a circuit I've simulated in pSpice, I can't get the currents to match up with my hand calculations using mesh analyses. Specifically, I'm not entirely sure how to handle the current source.
Homework Equations
Mesh 1 is far left, mesh 2 is the center and mesh the is the far right.
Mesh 1.
[itex]18 = 15i_{1} + 30(i_{1} - i_{2})[/itex]
Mesh 2.
[itex] 0 = 10i_{2} + 20(i_{2} - i_{3}) + 30(i_{2} - i_{1})[/itex]
Mesh 3.
[itex] 30 = 40i_{3} + 20(i_{3} - i_{2}) [/itex]
finally, putting all this in a matrix ( I'm using an online calculator, to eliminate the possibility of an error here, but I do know how to do it by hand ).
I get,
[itex]
i_{1} = 0.407A
[/itex]
[itex]
i_{2} = 0.010A
[/itex]
[itex]
i_{3} =-0.580A
[/itex]
Thanks
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