Ivar KJELBERG
COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted:
1 decade ago
Nov 12, 2011, 5:51 a.m. EST
Hi
check out the corresponding magnetisation M, or if you cannot find that on the web get an approximate Tesla value measured close to the magnet (in a free air case, simple model you can reproduce), and adapt your M of your magnet material to get the same freestanding Tesla value in your example model with COMSOL
--
Good luck
Ivar
Hi
check out the corresponding magnetisation M, or if you cannot find that on the web get an approximate Tesla value measured close to the magnet (in a free air case, simple model you can reproduce), and adapt your M of your magnet material to get the same freestanding Tesla value in your example model with COMSOL
--
Good luck
Ivar
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Posted:
1 decade ago
Nov 6, 2013, 3:13 a.m. EST
I have been working with N42 magnets and use a older Gauss meter for measurement as values for plug in values in this way. The unit values in COMSOL are in Webers. I was wondering if the values were transposed properly as I do not see the m being squared or M-2 in non superscript text. Should I be taking the Square root of the Tesla unit? Otherwise, I am still digging into how to set polarity and spatial blotch regions properly. I appreciate your time and input. COMSOL MULTIPHYSICS is Great. Now all I have to do is figure out how to use it! Independent Researcher, Scott Clark
I have been working with N42 magnets and use a older Gauss meter for measurement as values for plug in values in this way. The unit values in COMSOL are in Webers. I was wondering if the values were transposed properly as I do not see the m being squared or M-2 in non superscript text. Should I be taking the Square root of the Tesla unit? Otherwise, I am still digging into how to set polarity and spatial blotch regions properly. I appreciate your time and input. COMSOL MULTIPHYSICS is Great. Now all I have to do is figure out how to use it! Independent Researcher, Scott Clark
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Posted:
1 decade ago
Nov 6, 2013, 4:00 p.m. EST
You can find more detailed Information about the magnetization of N42 Magnets on the Internet, for example here:
www.ndfeb-info.com/neodymium_grades.aspx
With that said, you can specfiy the Magnet with a Ampere's Law in the Magnetic Fields Section:
- Select your Magnet as Domain
- In the Magnetic Field Section of the Ampere's Law, select Remanent Flux Density as Constitutive relation
- Set your B_r in the field wich apears
You can find more detailed Information about the magnetization of N42 Magnets on the Internet, for example here: http://www.ndfeb-info.com/neodymium_grades.aspx
With that said, you can specfiy the Magnet with a Ampere's Law in the Magnetic Fields Section:
- Select your Magnet as Domain
- In the Magnetic Field Section of the Ampere's Law, select Remanent Flux Density as Constitutive relation
- Set your B_r in the field wich apears
