If you have the Nyquist plot then you can get values such as re, im and w (in matlab). Do some reverse engineering for modeling the RLC with the frequency dependency ...

Dear Krishnadas Nampoothiri ,

Thanks so much for yoy question. Thanks a lot to Aparna Sathya Murthy .

Yes, i agree with Dr. Aparna Sathya Murthy . You can get values of Re, im and w using matlab.

With my best regards!

Adel OUESLATI

Thanks Aparna and Adel. May I know more about it. Actually I have the Xc vs Xr curve. Shoulf I need to transfer the values to some control functions before getting it done in matlab.

Xc or Xf are recognized as phase variations Krishnadas .

I was thinking of transfer function but then how did you get the Nyquist plot in the first place ??

Its Xc vs Xr graph. It can be termed as Nyquist plot in electrochemistry. Can I use this graph in matlab to extract the electrical components.

If not can you suggest any other way to extract

They are electrical components . My suggestions (stick with Matlab)

Get the [re ,im,w] from Nyquistplot ( Xc,Xr)

Check for non-zeros im because this is phase component (or Capacitance)

re is anyway the resistance part .

For both non-zero re and im it should be C and R (they come in parallel that is the norm)

Worst case : share the data with me , shall try some gimmicks

Thanks Aparna. Will look into that and will definitely contact you if necessary