Hi team,
I tried to simulate EMC as per your technical article(https://www.analog.com/en/technical-articles/how-to-get-the-best-results-using-ltspice-part-1.html).
It shows a syntax error when adding the plot file .please check once and give a solution.
*I am attaching asc and PLT files FYR
Hi Anoop Varma m,
I was able to run the AC analysis and have the plots for the vanalyzer1 and vanalyzer2.
Note that V1 value is changed to AC 1 for AC analysis.
Hi Anoop Varma m,
I was able to run the AC analysis and have the plots for the vanalyzer1 and vanalyzer2.
Note that V1 value is changed to AC 1 for AC analysis.
Hi John Kevin,
Thank you for the replay, I want CM DM separate graph(FFT analysis). please find the attached sample.
this is from the ADI article "How to Get the Best Results Using LTspice for EMC Simulation—Part 1 "
Hi Anoop Varma m,
I hope this can help you.
I tried this step by step procedures
1. Run the transient analysis and plot the vanalyzer1 and vanalyzer2
2. Go to VIEW menu and select FFT
3. Select OK
4. Select OK
Results to this
5. Add a plot pane and perform the mathematical operation to get the VCM and DCM
Final Result:
Hi John Kevin,
Thanks for your reply, Please support the below method also.
The technical note- they mentioned the EN55022 Emission Limit Lines program, the same way I made the PLT file and added it to the Ltspice plot setting, but it shows a syntax error.
In the Below video, they explain the methods.
1)https://www.youtube.com/watch?v=Ofnyqd-yl9o
Thank you for sharing this link!
This is what I am able to generate so far.
I'm figuring out how to show the X-axis up to 30MHz.
Here is the *.plt
[FFT of time domain data]
{
Npanes: 1
{
traces: 2 {2,0,"(V(vanalyser2)+V(vanalyser1))*0.5*1e6"} {2,0,"(V(vanalyser2)-V(vanalyser1))*0.5*1e6"}
X: ('M',0,9000,0,30e+06)
Y[0]: (' ',0,0.0001,20,1e+006)
Y[1]: (' ',0,-450,50,100)
Log: 1 2 0
GridStyle: 1
PltMag: 1
Line: "dB" 4 0 (9000,316227.766016838) (50000,316227.766016838)
Line: "dB" 4 0 (50000,316227.766016838) (50000,316227.766016838)
Line: "dB" 4 0 (50000,316227.766016838) (150000,10000)
Line: "dB" 4 0 (150000,10000) (150000,1995.26231496888)
Line: "dB" 4 0 (150000,1995.26231496888) (500000,630.957344480193)
Line: "dB" 4 0 (500000,630.957344480193) (5000000,630.957344480193)
Line: "dB" 4 0 (5000000,630.957344480193) (5000000,1000)
Line: "dB" 4 0 (5000000,1000) (30000000,1000)
}
}
