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# [FEMM] axisymmetric femm problem with ringmagnet and steel plate

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- Subject: [FEMM] axisymmetric femm problem with ringmagnet and steel plate
- From: "Walter,Reinhard" <Reinhard.Walter@ottobock.at>
- Date: Wed, 14 Jan 2004 14:05:54 +0100
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    Dear Mr. Meeker and Femm group,

    We are currently working on different models for a holding magnet.
    The holding magnet should be a ringmagnet with axially magnetisation (
    thru-the-hole magnetised ).
    We would be interested in the magnetic field as well as the force of the
    ringmagnet on a steel plate in a distance of 1-2mm.

    To calculate this configuration I downloaded FEMM program and think it is a
    very useful tool !
    I have studied tutorial and manual and have drawn a layout of our problem,
    and also I think I set all configurations right, but when I want to rn the
    calculation I get an error, telling me that the problem couldn't be solved.
    Our problem should be able to be solved with FEMM, since it is an
    axisymmetric problem. However, I can only let FEMM solve it if I set
    problem-type to planar !?

    I have attached the FEMM file to this mail.

    If you could give me some assistance what I am doing wrong, then that would
    be very appreciated !

    Thanks in advance and best regards,

    Reinhard Walter

    Elektronische Entwicklung          Tel: +43 1 523 37 86 DW:664
    OTTO BOCK Austria GmbH        Fax: +43 1 523 22 64
    Kaiserstr. 39     A-1070 Wien      mailto: walter_r@ottobock.at

     <<ringmagnet.FEM>>

Attachment: `ringmagnet.FEM`
Description: Binary data

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