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Calculating Leakage and Magnetizing Inductance in a Simple Transformer Model
Posted 24 sept. 2025, 14:11 UTC−4 Electromagnetics, Results & Visualization Version 6.2 1 Reply
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Hello.
I am making a COMSOL model of a simple transformer with a primary 4 turn coil and a secondary single turn coil around a ferrite core. I was wondering if it was possible to calculate leakage and magnetic inductances in COMSOL with the model I have setup. Currently the only inductance values I can find are those of the individual coils.
My MPH file is attached below. Is the model I made too simple to undergo such analysis?
Thank you
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You can do this in comsol but I think that using the coil domain feature may not be the best approach here, given the 1MHz freq range. I am not making the claim this does not work but maybe another approach is easier. I would also suggest keeping your lead lengths in your model as short as possible. If you do not use the coil domain feature, then you could use lumped ports. This can still be done in mf module. You will have to create coaxial ports at the airbox edges to take advantage. In order to extract out leakage values you will need to be able to open and short circuit each side of the transformer while applying a source. You need to have the right boundary conditions set up for this. I would also suggest starting with a linear model using K statements for coil coupling and then work your way up to a 3D model. Maybe you already did that but just a suggestion if you did not.
