Re: [femm] Electro-magnetic bearing

[David Meeker <dmeeker@xxxxxxxxxxxxxxxxx>]

Rahul Kallurwar wrote:

> Hi David
>
> I am a student of cleveland State University and doing my thesis on 
> designing a magnetic bearing, for a test rig. while searching I found 
> one of the mail from Virginia student to you regarding the magnetic 
> bearing. you also have provided the link where the example for 
> magnetic bearing is given, but when I went through this link the I 
> found the page was not existed. I am in the condition that I done with 
> design now I have to verify my design. I already download your 
> software, i stuck at boundary conditions. If you can help me, I would 
> really appreciate you.
>
> Rahul
All of the examples from the Berlios site have been moved over to the 
new site.  The page with the examples is:
http://femm.foster-miller.com/examples.htm
and the example that you are probably after, is the "Radial Magnetic 
Bearing" example, which you can get to directly at:
http://femm.foster-miller.com/examples/brg/brg.html

W.R.T. boundary conditions, it is usually OK to apply A=0 to the outer 
edge of the iron in a radial bearing model.  For a thrust bearing, you 
also have to model some air around the bearing to get the fringing 
right, applying either A=0 or an asymptotic boundary condition at the 
edge of the air region.

Dave.

--
David Meeker
Senior Engineer
Foster-Miller, Inc.
350 Second Avenue
Waltham, MA 02451-1196
781-684-4070
781-890-3489 (fax)
dmeeker@xxxxxxxxxxxxxxxxx 
http://femm.foster-miller.com