Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Demagnetizing field
Posted 05.11.2012, 09:12 GMT-5 Low-Frequency Electromagnetics, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 4.3a 1 Reply
Please login with a confirmed email address before reporting spam
my goal is to observe the magnetic flux density in a gap of a toroid.
I started with 2D at the beginning and was able to simulate my experimental setup. The destribution of my field seems to be in consent with the expectations. The only problem are my values they doesnt coincide with my experimental values.
Simulation: B=220mT
Experimental setup: B=180mT
both values near saturation.
A smal part of the difference should come from the heating of my coil. The biggest part would be the demagnetizing field from the dipole generated by the magnetization in my core.
So how do I include the demagnetizing field in my simulation?
In the file attached is my model.
Best wishes,
Andreas Schneider
Attachments:
Please login with a confirmed email address before reporting spam
you should consider that your 2D model is not exactly a toroid but rather an infinitely long cylinder. This could account for a larger field in the model because along the z-direction there are no fringing fields as you have them in your lab setup.
Cheers
Edgar