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# AC & DC field question

- To: femm@yahoogroups.com
- Subject: AC & DC field question
- From: "alanbabb" <alan@babbspeakers.com>
- Date: Mon, 09 Sep 2002 20:38:17 -0000
- User-agent: eGroups-EW/0.82

    Is there a way to model the reslutant field of the AC field of a coil
    and the DC field generated by a permanent magnet.

    I have the complete motor structure of a loudspeaker design in FEMM
    but if I set the problem to have a frequency the permanent magnet
    drops out. I am trying to model the effects of shorted turns both
    inside and outside the voice coil in the magnetic gap.

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    - From: "David Meeker" <dcm3c@earthlink.net>

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