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BH curves

Posted 18 avr. 2011, 03:48 UTC−4 Low-Frequency Electromagnetics, Studies & Solvers, Structural Mechanics 1 Reply

Mathomo Moukangwe
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hi there, can you please help me with a programme or matlab codes used to simulate the BH curves for ferromagnetic material using a matlab
1 Reply Last Post 22 sept. 2011, 20:22 UTC−4
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Hello Mathomo Moukangwe

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Alexander Weddemann
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Posted: 1 decade ago 22 sept. 2011, 20:22 UTC−4
Hi Mathomo,

maybe this reply is a little bit late. It is possible to implement BH-curves directly into COMSOL by adding a set of ordinary differential equations which, from a physics point of view, represent the magnetic states of interacting magnetic dipoles. A small number of such dipoles is sufficient to generate hysteretic response functions and, therefore, the evaluation is usually very fast due to the small amount of additional degrees of freedom (2 per dipole). Properties of the curves can easily be modified by the adjustment of different particle parameters.

I attached a simulation result done with COMSOL so you can see whether this is actually something that you are looking for. If you need more information on how to implement the corresponding set of equations, this might be helpful.

www.comsol.com/community/forums/general/thread/22468/

Kind regards,
Alex
Hi Mathomo, maybe this reply is a little bit late. It is possible to implement BH-curves directly into COMSOL by adding a set of ordinary differential equations which, from a physics point of view, represent the magnetic states of interacting magnetic dipoles. A small number of such dipoles is sufficient to generate hysteretic response functions and, therefore, the evaluation is usually very fast due to the small amount of additional degrees of freedom (2 per dipole). Properties of the curves can easily be modified by the adjustment of different particle parameters. I attached a simulation result done with COMSOL so you can see whether this is actually something that you are looking for. If you need more information on how to implement the corresponding set of equations, this might be helpful. http://www.comsol.com/community/forums/general/thread/22468/ Kind regards, Alex

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