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# [FEMM] Thrust Bearing AC analysis

- To: <femm@list.foster-miller.net>
- Subject: [FEMM] Thrust Bearing AC analysis
- From: "Nathan Brown" <nathanbrown@snet.net>
- Date: Mon, 2 Feb 2004 23:27:48 -0500
- Cc: nathanbrown@snet.net
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    I'm hoping that someone can give me some pointers for a 'simple' AC
    analysis. I have many hours of FEMM experience solving DC magnetostatic
    problems, but have yet to attempt an AC analysis.

    Anyway, I'm trying to use FEMM to estimate the dynamic force capability of a
    solid-core magnetic thrust bearing over a range of frequencies (up to 100
    Hz). Before I get ahead of myself, will FEMM handle this type of analysis
    (dynamic force calculation, considering eddy current generation within a
    non-laminated block of material)?

     At this point all I have is the FEMM model I used to determine the DC force
    capacity of the thrust bearing. I did apply the electrical conductance
    property to the core materials, but now I'm stuck. I'd greatly appreciate
    any suggestions for how to proceed with the AC analysis.

    I can provide further information if necessary.

    Thanks!

    Nathan Brown
    nathanbrown@snet.net

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