Discussion Forum

Hello,

I am a newbie in Comsol and i am using the version 4.2a right now. I am trying to calculate the self and mutual inductance between 2 coils in 3D. i tried to search for different solutions in the forums here but none of the them solve my problem. My model is attached is big althought i cleared all meshes and solutions (19 MB) so i can't attach it here, i can send it by mail to ther person that can help me

I am having few problems with it:

1. I can't find the best way to excit the primary coil, i was thinking of creating an air cylinder between the beginning and the end of the coil ( like the tutoriel inductor_3D) and to put a terminal and ground on these endings. is it the best way for my case or is there an easier way to excit the primary coil?? P.S: I separated the 2 excitations in my last version but i can't send it here because it is much bigger than the file i am sending now

2. To calculate the inductances (self and mutual) , i found in different forums different solutions but what is the best one for my case using the newer version of Comsol and can you please explain it in details because i am a beginner. When i excit one coil, there is a solution in the derived values, i have different Impedance Z11, Z12, Z21, Z22. What does this represent? if i take imaginary part, will i get what i want? and what will happen if i excit 2 coils? what is the difference and what does these Impedances represent in this case??


3. What is the best way to mesh my system, i am adding now ferrite to the model and it is close to the coils and i am having big problems with meshes, it sometimes give me errors and obligate me to make the model bigger (air) which mean more time to compile and more RAM needed.

Thanks in advance