Multisim - Magnetically coupled circuits

Discussion in 'Homework Help' started by xxxyyyba, Oct 20, 2012.

  1. xxxyyyba

    Thread Starter Member

    Aug 7, 2012
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    Is it possible to simulate magnetically coupled circuits using Multisim?
    For example, can I simulate circuit below?
    [​IMG]
     
  2. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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    Look for coupled coils and then place the coefficient of coupling as a constant.
     
  3. xxxyyyba

    Thread Starter Member

    Aug 7, 2012
    249
    2
    Something like this?
    [​IMG]

    I found coefficient of coupling using formula k=M/sqrt(L1*L2).
     
    Last edited: Oct 20, 2012
  4. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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    What is the purpose of U1 in your circuit? I don't think ohmmeters should be placed in "series" with the voltage source.
     
  5. xxxyyyba

    Thread Starter Member

    Aug 7, 2012
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    U1 is ammeter, my task is to find current in circuit using multisim, I didn't mention it at beginning...
     
  6. xxxyyyba

    Thread Starter Member

    Aug 7, 2012
    249
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    I made mistake in my first post, instead of "e(t)=5.94*cos(3*t+140)" it should be "e(t)=220*sqrt(2)*sin(314t)".
     
    Last edited: Oct 20, 2012
  7. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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    Did your calculations agree with the simulator's value? What about the output voltage in your diagram?
     
  8. xxxyyyba

    Thread Starter Member

    Aug 7, 2012
    249
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    Yes, they agree. I really don't know why u(t) is indicated but it doesn't matter. I also simulated few other circuits and results I got by hand matched with results I got using multisim so I think I got it... Thanks a lot for help!
     
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