Node voltage time domain circuit

Discussion in 'Homework Help' started by jstrike21, Oct 29, 2009.

  1. jstrike21

    Thread Starter Member

    Sep 24, 2009
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    I have the two node equations set up

    Node A: -10 + V1/10 + (v1-v2)/(1+j56.55)=0
    Node B: (v2-v1)/(1+j56.55) - v2/j299.16 + v2/5=0

    I have no idea how to solve this...
    help please


    updated the pdf attached
     
    Last edited: Oct 30, 2009
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
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    Not sure what relevance is the attached file....?

    Was it meant to show your working?
     
  3. jstrike21

    Thread Starter Member

    Sep 24, 2009
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    attached file is the actual assignment
     
  4. t_n_k

    AAC Fanatic!

    Mar 6, 2009
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    Attachment looks like a set of lecture notes which seem to have no connection with your nodal equations.:confused:
     
  5. jstrike21

    Thread Starter Member

    Sep 24, 2009
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    o crap wrong attachment ill put the new one u[p
     
  6. t_n_k

    AAC Fanatic!

    Mar 6, 2009
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    In any case you need to re-arrange the equations first by collecting the coefficients of the common variable terms (v1 & v2) into the standard form for solution.

    Node A:

    V1(1/10+1/(1+j56.55))-V2/(1+j56.55)=10

    Node B:

    -V1/(1+j56.55)+V2(1/(1+j56.55)+1/5-1/j299.16)=0

    If you have Matlab or something equivalent which handles complex number matrices you can solve the two equations simultaneously for V1 & V2. Otherwise you have to do it long hand which is a fair amount of work.
     
  7. jstrike21

    Thread Starter Member

    Sep 24, 2009
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    thanks for the help, i found a way to solve it on my ti-89
     
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