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# Re: Incorrect Field values returned by FEMM

- To: femm@yahoogroups.com
- Subject: Re: Incorrect Field values returned by FEMM
- From: "vecerkaj" <vecerkaj@yahoo.com>
- Date: Fri, 07 Dec 2001 06:03:56 -0000
- In-reply-to: <9uom1u+lr1m@eGroups.com>
- User-agent: eGroups-EW/0.82

    --- In femm@y..., "cgn38nuc" <cgn38nuc@y...> wrote:
    > I am using FEMM 3.1 to analysis a lifting magnet. The results as
    > returned by the program indicate a maximum B value of 5.3 Tesla 4"
    > from the working surface of the magnet. But, the saturation of
    steel
    > only produces slighly more than 2 Tesla. I wasusing the B-H curve
    of
    > 1020 Steel in my formulation. What am I missing from my analysis.
    >
    > Thank you,
    > Paul Sheridan

    Hi
    It looks like you calculated it as a harmonic analysis. In that case
    the BH curve is ignored and linear mi(B/H) is used instead of BH
    curves.
    Another reason for the problem could happen, when you define two
    block parameters for one region. In that case you are not sure which
    parameters were used. (I mean, if you don't close an iron region (by
    mistake), FEMM can "catch" parameters from surrounding air instead of
    supposed iron parameters).
    Both mistakes you can find out in the postprocessor by checking of mi
    in the iron region.

    Jiri Vecerka

- References:
  - Incorrect Field values returned by FEMM
    - From: "cgn38nuc" <cgn38nuc@yahoo.com>

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