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# Re: [femm] nonferrous electromagnets

- To: femm@yahoogroups.com
- Subject: Re: [femm] nonferrous electromagnets
- From: David Meeker <dmeeker@foster-miller.com>
- Date: Mon, 11 Feb 2002 17:56:56 -0500
- References: <3C6704F7.20382.2ECEAF6@localhost>

    sunshine_80918@yahoo.com 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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    adr:;;350 Second Avenue;Waltham;MA;02451;USA
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    email;internet:dmeeker@foster-miller.com
    title:Senior Engineer
    fn:David Meeker
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