RE: [femm] Re: FEMM simulations errors ??

[Mario Acuna <u2mha@xxxxxxxxx>]

Hello Adrian:

The "pole"is defined as the direction to which a compass (North
or South) points. By convention the direction of the magnetic field line
is such that it emanates from the south geographic pole and enters into
the north geographic pole. This can be derived from geomagnetic maps
showing the "dip" angle of the field.

Cheers!

Mario
--------
At 10:41 AM 6/13/2001 +0100, you wrote:

> Hi,
>
>    Just curious, but
> is a North pole the same field as emanates from the Earth s North pole,
> or the field that comes from a compass North pointing end?
>
>  
>
> Thanks
>
> Adrian
>
>  
>
> -----Original Message-----
> On Behalf Of David Meeker
> Sent: 12 June 2001 23:07
> To: femm@xxxxxxxxxxxxxxx
> Subject: [femm] Re: FEMM simulations errors ??
>
>  
>
>
> The way to see this is to think of each magnet as being
> composed of 2 
> point poles of strength Q.  For a N pole, the force on
> the pole is 
> B*Q, where B is the flux density created by the stator
> permanent 
> magnets.  For a S pole, the force is -B*Q.  When you
> look at it this 
> way, you can see that the vertical force should be zero, and
> there 
> should be a net horizontal force to the right.  One
> reference for this 
> trick is M. Lindeburg's "Engineer in Training Review
> Manual, 6th ed.,"
> 1982.
>
> Dave 
> Meeker
> --
> http://members.aol.com/_ht_a/dcm3c
>
>
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Dr. Mario H. Acuna
u2mha@xxxxxxxxx