this model maybe helpful to you, and the induced voltages both in the primary and the secondary windings are calculated. It may be a little complex than your model.
www.comsol.com/showroom/gallery/14123/
Thanks, that is helpful.
I've tried to modify that example until it's just like what I'm modeling, but I've encountered another problem. As soon as the coils move apart (in my model they are beside each other, not one within the other), the solution no longer converges. I've attached the model, and if you vary the coil_dist parameter from 14mm to 16mm you will see that it suddenly stops converging. Do you have any idea why this might be?
i think you have to make shure that the coil-domains did not intersect with each other. Also as the geometry changes doublecheck the allocation of the coilin respect eg. ports or reference edges.
