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# Magnetizing Fixture Design - Helllp...:-))

- To: femm@yahoogroups.com
- Subject: Magnetizing Fixture Design - Helllp...:-))
- From: "tonyrouget" <tonyrouget@yahoo.com>
- Date: Fri, 16 May 2003 21:02:53 -0000
- User-agent: eGroups-EW/0.82

    Hi There,

    It's been few month now that I really appreciate the help of FEMM in
    my little design projects: Loudspeaker motor design...

    I just did a new project for a Neodymium magnet(Neo35H) and I need to
    design a Magnetizing fixture for our magnetizer. From my
    understanding, a solenoid embedded in thermaly conductive Epoxy -
    Water cooled in some cases.. I would need about 30000 to 32000Oe to
    coerce this magnet.

    >From what I read, the stresses develloped on the coil(Maxwell
    stresses) when it's being pulsed for @ example 35000G could be up to
    10000psi...That's quite a lot..lots of fatigue strength expected on
    the coil..

    One thing I read, is that my entire system has to be overdamped to
    prevent ringing of the R - L - C..So my fixture resistance should be
    high enough to overdamp the system

    If Anybody has information related to this type of design, I would
    really appreciate to have your expertise...

    How can I simulate with FEMM such a system? Any idea welcome??

    Regards
    Tony

    Ps: Attention to Keith Gregory..I used to be one of your student @
    Loughborough University..:-)) How little is our world...

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