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# what frequency range can FEMM be used in?

- To: femm@yahoogroups.com
- Subject: what frequency range can FEMM be used in?
- From: corneliuspaul@gmx.de
- Date: Wed, 30 May 2001 19:49:54 +0200 (MEST)

    hello everybody,

    i am new to this group, let me first introduce myself..
    my name is cornelius paul, i graduated from university last year
    and have recently begun to work as a free lance electronic engineer.
    i am a novice to using the FEM method for electromagnetic devices.
    at the moment i am studying various books on the topic, some of them
    have been mentioned on this mailing list. i am also in the process
    of reviewing various software packages available. i have cross-read
    the whole web-archive for this mailing list and found some great hints,
    thank you!!
    discovered the fabulous freeware FEMM with great surprise and read all
    your positive comments..

    the only reason i need an electromagnetic field FEM software right now is
    that i
    have to do a research on different concepts for a high voltage transformer.
    the device will be operated at 50kHz, maybe later the frequency range will
    be extended to about 200kHz.
    i need to compute the following parameters:
    - main and leakage inductance (good accuracy needed)
    - rms, skin and proximity losses (average accuracy needed)
    - core losses (average accuracy needed)
    (sinusoidal currents will do fine as a first approach, arbitrary current
    waveforms
    would be great.)

    the manual says the FEMM software is to be used for "low frequency
    applications"
    but i have not found what frequency range is meant by "low"

    so my question to the experienced group is:
    is the FEMM package suitable for the given frequency range and needed
    computations?

    as stated, i am just beginning with FEM based computations and do so on
    a rather restricted field of research. I would therefore happily use a
    freeware
    program rather than paying a huge amount for a software i might not need
    later on..

    your comments are very much appreciated
    thank you!

    regards,
    cornelius

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