[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

# [femm] Problems with non-linear B-H-curves

- To: femm@egroups.com
- Subject: [femm] Problems with non-linear B-H-curves
- From: Kuepferling Michaela <kuepfer@xphys.tuwien.ac.at>
- Date: Wed, 10 Nov 1999 13:32:37 +0100
- Delivered-to: listsaver-of-femm@egroups.com
- Delivered-to: listsaver-egroups-femm@egroups.com
- Mailing-list: contact femm-owner@egroups.com
- Reply-to: femm@egroups.com

    In our group at the Vienna University of Technology we measure magnetic
    materials with magnetic pulse fields. I wanted to compare a
    hysteresis-measurement of a Ni-sphere with a radius of 4.85mm with the
    results of FEMM. The following questions arised: I got with FEMM B~8.3T
    inside the sphere (see the attached file NiBr2.EMF). But with the applied
    field of ~5.2T and J(Ni)~0.6T, when Ni is saturated, B becomes about 5.8T.
    Why is the calculated B so high? The other problem is, that we expected a
    decay of B inside the sphere because of the induced eddy currents. But with
    FEMM I found an increase of B with decreasing radius (see the attached file
    NiBrki.EMF).
    I welcome any comments!
    Michaela Küpferling

Attachment: `NiBrki.EMF`
Description: Binary data

Attachment: `NiBr2.EMF`
Description: Binary data

- Follow-Ups:
  - [femm] Re: Problems with non-linear B-H-curves
    - From: David Meeker <dmeeker@foster-miller.com>

- Prev by Date: [femm] Re: tutorial
- Next by Date: [femm] Problems with FEMMPLOT
- Previous by thread: [femm] Re: tutorial
- Next by thread: [femm] Re: Problems with non-linear B-H-curves
- Index(es):
  - Date
  - Thread