How to Accurately Measure Phase Angle in Multisim for Circuit Analysis

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SUMMARY

This discussion focuses on measuring phase angle in Multisim for circuit analysis, specifically for a capacitor (C1). The user successfully modified the "AC analysis magnitude" of the voltage source to 16.970562 and utilized the Single Frequency AC Analysis feature to obtain phase measurements. However, discrepancies arose between the calculated phase angle of the current through C1 and the expected result, with Multisim providing a phase angle of 1.959 degrees compared to the user's manual calculation of -178.040 degrees. The discussion highlights the importance of correctly setting up simulation parameters to achieve accurate phase angle measurements.

PREREQUISITES
  • Understanding of AC circuit analysis principles
  • Familiarity with Multisim software version used for simulation
  • Knowledge of complex numbers and their representation in electrical engineering
  • Basic skills in trigonometry, specifically the arctangent function
NEXT STEPS
  • Explore advanced features of Multisim for AC analysis
  • Learn about complex impedance and its impact on phase angle calculations
  • Research the differences between manual calculations and simulation results in circuit analysis
  • Investigate common pitfalls in phase angle measurement using simulation tools
USEFUL FOR

Electrical engineers, circuit designers, and students involved in circuit analysis who are using Multisim for simulation and measurement of phase angles in AC circuits.

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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.
 
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Solved...
 
How did you do it?
 
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:

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