RE: [femm] nonferrous electromagnets

["kirk" <kirk@xxxxxxxxxxx>]

Lindsay books (Lindsey books? sp.) has a reprint they are selling
about building an electromagnet for attracting nonferrous objects.
They have material on normal electromagnets as well.
The book on solenoids is very good. Graphs to calculate force for
designers when a slide rule was state of the art computing.

Kirk


-----Original Message-----
From: David Meeker [mailto:dmeeker@xxxxxxxxxxxxxxxxx]
Sent: Monday, February 11, 2002 3:57 PM
To: femm@xxxxxxxxxxxxxxx
Subject: Re: [femm] nonferrous electromagnets




sunshine_80918@xxxxxxxxx wrote:

> Hi all. Been thinking about a project involving nonferrous
> electromagnets, attracting metal with low electrical resistance like
> copper, alluminum, gold etc... Want to know if anyone here knows
> anything or has any experience with this subject. I have searched
> the archives and found no mention and what I did find did not
> understand much. I have a book on order about how to make one,
> just being impatient and thought someone might know from
> experience. Thanks for your time, Mark

In most applications in which a coil acts on nonferrous objects, the forces
are repulsive rather attractive. A nice paper that describes this
phenomenon
is http://members.aol.com/marcttpapers/ieee_potentials_2000.pdf

Dave.







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