How to Accurately Measure Phase Angle in Multisim for Circuit Analysis

Join the discussion
Ask a follow-up here, or get your own question answered by working scientists, mathematicians and engineers — people, not an autocomplete.
Real named experts · corrections over time · the nuance an AI answer skips
4 replies · 10K views
etf
Messages
179
Reaction score
2
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.
 
Engineering news on Phys.org
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.
 
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: