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# [FEMM] BH curves, intrinsic?

- To: <femm@list.foster-miller.net>
- Subject: [FEMM] BH curves, intrinsic?
- From: "Jean-Michel Le Cléac'h" <jean-michel.le_cleach@ensmp.fr>
- Date: Tue, 16 Mar 2004 10:31:52 +0100
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    Hello,

    I want to enter a new ferromagnetic metal in my "material library".

    I have the intrinsic BH curve of the metal.

    After editing all the BH curves for ferromagnetic metals in the actual FEMM
    library, I can see that the BH curves are not the "intrinsic curves" but
    that a term in ( 10^6 . H ) is added (probably to enter the "total" B at a
    given H).

    This is specially important for high H values because if I enter the
    intrinsic curve, saturation can occur. When using as the B value the
    (intrinsic B + 10^6 . H ) value, the curve has an asymptot.

    Is there any document dealing with the way a BH curve has to be entered in
    the library.

    Any help will be appreciated.

    Jean-Michel Le Cléac'h, Paris, France

    lecleach@musee.ensmp.fr and lecleach@cgi.ensmp.fr

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