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Error in inductor modelling with Magnetic fields interface
Posted 06.05.2013, 05:44 GMT-4 Low-Frequency Electromagnetics, Studies & Solvers Version 4.3a 1 Reply
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Dear all,
I'm using the Magnetic fields interface on an inductor model I'm currently working on. The idea is to do a multiphysics coupling with Heat transfer in solids so that I can compare it with results I've achieved using the Induction heating interface. My model is very similar to a tutorial model called "single_coil_boundary_feed" (www.comsol.com/showroom/documentation/model/14067/), and the physics are setup in exactly the same way. The difference is that my model has 17 turns instead of only one that we have in the tutorial model.
When I run a simulation only consisting of the coil and an air domain around it, I have no issues at all. But since this is supposed to be a more detailed model of an inductor I would like to incorporate a core (a very simple, rectangular box in the middle of the windings) and a circular shell surrounding the inductor.
However, when I try incorporating the shell the simulation won't converge. The error I'm getting is "Failed to find a solution. Divergence of the linear iterations. Returned solution is not converged". I've tried with a more detailed mesh and that doesn't solve the problem. I've also tried using a non-zero conductivity of the air and that doesn't do the trick either. I haven't tried incorporating the core yet since I suspect that it will also give the same error. I have no idea what the problem could be, so I really need your help.
Best regards
Bilal
I'm using the Magnetic fields interface on an inductor model I'm currently working on. The idea is to do a multiphysics coupling with Heat transfer in solids so that I can compare it with results I've achieved using the Induction heating interface. My model is very similar to a tutorial model called "single_coil_boundary_feed" (www.comsol.com/showroom/documentation/model/14067/), and the physics are setup in exactly the same way. The difference is that my model has 17 turns instead of only one that we have in the tutorial model.
When I run a simulation only consisting of the coil and an air domain around it, I have no issues at all. But since this is supposed to be a more detailed model of an inductor I would like to incorporate a core (a very simple, rectangular box in the middle of the windings) and a circular shell surrounding the inductor.
However, when I try incorporating the shell the simulation won't converge. The error I'm getting is "Failed to find a solution. Divergence of the linear iterations. Returned solution is not converged". I've tried with a more detailed mesh and that doesn't solve the problem. I've also tried using a non-zero conductivity of the air and that doesn't do the trick either. I haven't tried incorporating the core yet since I suspect that it will also give the same error. I have no idea what the problem could be, so I really need your help.
Best regards
Bilal
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1 Reply Last Post 08.05.2013, 14:11 GMT-4
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Posted:
1 decade ago
There is no air domain in your model.
Why do you use MEF. Try Magnetic field, instead.
Don't declare any zero value parameter in your material property. Give it a non-zero value. You can make it very small!
Why do you use MEF. Try Magnetic field, instead.
Don't declare any zero value parameter in your material property. Give it a non-zero value. You can make it very small!