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Permanent magnet
Posted 3 giu 2012, 12:23 GMT-4 Low-Frequency Electromagnetics, Studies & Solvers 0 Replies
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In fact it is a similar model to the one in the model gallery: www.comsol.com/showroom/gallery/2014/
The only difference is that iron cores have a circular shape as show in the attached images. I will give you all the details of the model:
the rotating disk(Copper) has a radius dr = 10[cm] and thichkness dt = 1[cm]
1. Firstly I defined a sphere with radius 3*dr in order to define the air space
2. Then, I defined the rotating disk (the red internal smaller disk)
3. I defined the two cylindrical irons
4. I defined the Magnet(the red external cylinder) and I selected Remanent flux density in Ampère's Law and Current Conservation: Br = (0 0 mB) mB = 1[T].
So my model is almost the same model of the one in the gallery just I have changed the the shape of the part of the disk where I want to apply the permanent magnetic field in order to make the problem axisymmetric: In the model gallery the magnetic filed Br is applied in a square part of the disc and in my model Br is applied in a circular part of the disk and this why I have changed the geometry of iron cores. Unfortunately I get the error: Last time step is not converged.
N.B: I am not using RMM physics because the Br(applied permanent magnet is static).
Thanks for answering.
Best regards.
John J
Hello John J
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