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# Voice Coil Motor with Aluminum bobbin

- To: femm@yahoogroups.com
- Subject: Voice Coil Motor with Aluminum bobbin
- From: "tano1938" <rgarritano@comcast.net>
- Date: Fri, 23 May 2003 17:56:30 -0000
- User-agent: eGroups-EW/0.82

    I'm trying to model a voice coil motor such that I can check the
    performance at different frequencies. The voice coil is wound on a
    thin aluminum bobbin for support which I suspect will effect the
    performance at high frequency due to eddy currents in the aluminum.
    The coil is modeled as a current sheet with zero conductivity. This
    is the first time I've used a frequency other than zero with this
    design and I'm not too sure how femm operates in this mode. The
    only "field" in this model is the current in the coil, so I'm
    assuming that this current is oscillating when I set a frequency
    other than zero. The results I get even when running very low
    frequencies are not possible.

    The file in the files section is "Eddy_VC.FEM"

    Thanks for your help

- Follow-Ups:
  - Selectgroup problem
    - From: "Eric Vogels" <eric.vogels@telia.com>
  - Re: [femm] Voice Coil Motor with Aluminum bobbin
    - From: David Meeker <dmeeker@ieee.org>

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