# Mesh current analysis help.....

Discussion in 'Homework Help' started by Ledwardz, Oct 31, 2010.

1. ### Ledwardz Thread Starter Member

Oct 31, 2010
37
2
Hi, ive been given the circuit below to analyse using Mesh current analysis but get the wrong answer every time (ive been told the correct answer of current across winding one is 27.5 A. Its the first time ive ever used mesh current or had to analyse a circuit so go easy on me. Thanks in advance if anyone can help.

(p.s the work sheet is in the attachment and its only the mesh current one)

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2. ### hgmjr Moderator

Jan 28, 2005
9,030
214
There is a pretty good example of mesh analysis in the free aac ebook.

Using Millman's theorem, I obtain the magnitude of winding 1 current to be 27.04626 Amps rather than 27.5 Amps.

Go ahead and post your efforts to solve the problem and our members can assist you with any snags you encounter.

hgmjr

3. ### Ledwardz Thread Starter Member

Oct 31, 2010
37
2
Thanks for the reply, i hadn't seen the example that the link provides al have another go n close the post if i can do it.

4. ### Ledwardz Thread Starter Member

Oct 31, 2010
37
2
failed again...... i included a picture of my working out. if anyone could take a look at help me out id appreciate it.

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5. ### hgmjr Moderator

Jan 28, 2005
9,030
214
In the last reduction where you subtract the two equations, you have obtained the wrong sign of the coefficient for I2. If you correct that number you will come up with a result that is very close to the right value.

hgmjr

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6. ### Ledwardz Thread Starter Member

Oct 31, 2010
37
2
ahhhh i feel stupid now. Thanks for the help.