Can the core material have a B-H curve instead of fixed permeability?

[David_r]

Hi,

I’m a student at UPM (Madrid) and I’m starting a project on small TMS coils. Basically multi-layer helical coils wound on a ferrite core, and I want to look at the E-field they induce in a mouse or human head model.

I found the thread about ferrous cores (post 1953) and the one about getting the inductance from the magnetic energy (post 65), which helped a lot. But there are a couple of things I couldn’t find anywhere:

In the Magneto Static Vector Potential solver, is there a way to define the core with a nonlinear B-H curve (so it saturates), or does it only take a constant relative permeability? This is the main thing I need, since ferrite saturates.
Is it possible to do the whole thing from Python (build the coil with the core, set up the vector potential + quasi-static simulations and get the E-field and the energy), or are some steps GUI-only?
I also saw in post 1599 that a sweep didn’t work when the quasi-static solver took the vector potential results as input. Is that still the case? I’d like to sweep the current and the coil position.

Thanks!