Discussion Forum

It would be better if you posted your file. You may get a better response.

Sorry, I send the file with cleaned results to reduce the file size. My goal is to study the model in frequency domain. Thank you for helping me

Just looking at it very briefly, on the coil domain setting did you intend for this to be a bundle of wires or single wire wound around a core? Homogenized multiturn is for tiny wire bundles. If that wass your intent then ok. Here is a good example to check out related to this:

https://www.comsol.com/model/multi-turn-coil-winding-around-a-ferromagnet-23641

I would also suggest that you disable the circuit option for now. You can solve this problem without it but activate it later when it model otherwise works. I find it easier to add complexity after the problem solves successfully. That way if something goes wrong you have a better chance of fixing it.

There are other example files to look at on the comsol website. I cannot spend a lot of time on this problem but maybe somebody else can help with more detail.

Thanks a lot for the help, yes I want to model a single wire around the ferromagnetic core. I think that the problem is caused by the geometry of the coils, so I did a second model using a toroidal geometry for the coils, now the resistance is quite smaller. Thank you again