Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Self-inductance as a function of time

Please login with a confirmed email address before reporting spam

Hello everybody!

I've done a time harmonic > Time dependent analysis with a 3D inductor, applying a sinusoidal current similar to A+B*sin(omega*t).

First, I tried a material with a nonlinear behavior (hysteresis), and the result was a time-varying self-inductance, though it couldn't be possible because the current applied should not saturate the core.
Then, I tried a linear material (constant relative permeability), and the result was a time-varying self-inductance again!

If it helps, it's a 3D > AC/DC Module > Quasi-Statics, Electromagnetic > Electric and Induction currents model. I use the Port option to apply the current at the terminals of the copper wire.
I attach 2 pictures, the current applied (Isin) and the linear model results (L).

Anyone knows what's happening?
Thanks in advance.

Lidia.


0 Replies Last Post 17.03.2010, 06:17 GMT-4
COMSOL Moderator

Hello Lidia Campa

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.