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Phase measurement in Multisim

  1. Dec 9, 2014 #1

    etf

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    Hi!
    Is it possible to measure phase angle in Multisim? I want to measure phase angle of current through capacitor C1:

    sema1.jpg

    I got by hand ic1(t)=0.117*sqrt(2)*sin(2*pi*50*t-178.040deg)

    Thanks in advance.
     
  2. jcsd
  3. Dec 9, 2014 #2

    etf

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    Solved...
     
  4. Dec 9, 2014 #3

    berkeman

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    Staff: Mentor

    How did you do it?
     
  5. Dec 9, 2014 #4

    etf

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    Firstly, it's necessary to modify "AC analysis magnitude" of sources: in my case I put 16.970562 (12sqrt(2)) for voltage source, current source shouldn't be modified. Then I go to Simulate->Analysis->Single frequency AC analysis and there we choose Magnitude/Phase for Complex number format and in Output tab we select our variables. Here are phases for 4 nodes in our circuit:

    mjerenje.jpg

    It matches with result I got by hand. However, for some reason phase of current through capacitor C1 doesn't match with my result.
     
  6. Dec 9, 2014 #5

    etf

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    It doesn't calculate phase angle on same way as I. Here is complex current IC1:
    IC1=-0.1174-0.0040195j. Phase angle of this current is atan(-0.0040195/(-0.1174))-pi=-3.1073rad=-178.040deg. Multisim calculates only atan(-0.0040195/(-0.1174))=1.959deg.

    mjerenje2.jpg
     
    Last edited: Dec 9, 2014
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