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Small signal analysis of an inductor

Posted May 26, 2011, 3:20 a.m. EDT Low-Frequency Electromagnetics Version 4.0, Version 4.0a, Version 4.1, Version 4.2 2 Replies

L. Queval
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Hi,

Does anyone has a working version of the tutorial
- Small signal analysis of an inductor
for Comsol 4.0 or higher ?

Thanks
2 Replies Last Post May 27, 2011, 7:41 a.m. EDT
L. Queval
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Posted: 1 decade ago May 26, 2011, 9:45 a.m. EDT
I attached here a trial for a "Small-Signal Analysis of an Inductor" with Comsol 4.1.
I followed the tutorial for 3.5 but I only calculate the inductance for one value of the bias current.

-The bias point is obtained from a stationary solution.
-Then a time-harmonic simulation of the linearized model is superimposed on the stationary solution.

The inductance should be between 0.2 and 0.22 but I obtained 0.0093.

Any idea ?
I attached here a trial for a "Small-Signal Analysis of an Inductor" with Comsol 4.1. I followed the tutorial for 3.5 but I only calculate the inductance for one value of the bias current. -The bias point is obtained from a stationary solution. -Then a time-harmonic simulation of the linearized model is superimposed on the stationary solution. The inductance should be between 0.2 and 0.22 but I obtained 0.0093. Any idea ?
L. Queval
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Posted: 1 decade ago May 27, 2011, 7:41 a.m. EDT
I attached here a improved version for a "Small-Signal Analysis of an Inductor" with Comsol 4.1.

-The bias point is obtained from a stationary solution.
-Then a time-harmonic simulation of the linearized model is superimposed on the stationary solution.

I think that the initial conditions for the linearized time-harmonic simulation are correctly set up but for a subtle reason the inductance calculation is incorrect.

Can anyone have a look ?

--
L. Queval
I attached here a improved version for a "Small-Signal Analysis of an Inductor" with Comsol 4.1. -The bias point is obtained from a stationary solution. -Then a time-harmonic simulation of the linearized model is superimposed on the stationary solution. I think that the initial conditions for the linearized time-harmonic simulation are correctly set up but for a subtle reason the inductance calculation is incorrect. Can anyone have a look ? -- L. Queval

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