Portal de Periódicos da CAPES

A model of anisotropic Alnico magnets for field computation

1982; IEEE Magnetics Society; Volume: 18; Issue: 3 Linguagem: Inglês

10.1109/tmag.1982.1061943

1941-0069

Peter G. C. Campbell, S. Al-Murshid,

Magnetic Bearings and Levitation Dynamics

The modeling of an anistropic Alnico magnet for the purpose of field computation involves assigning a value for the material's permeability in the transverse direction. This is generally based upon the preferred direction properties, being all that are easily available. By analyzing the rotation of intrinsic magnetization due to the self-demagnetizing field, it is shown that the common assumptions relating the transverse to the preferred direction are not accurate. Transverse magnetization characteristics are needed, and these are given for Alnico 5, 5-7, and 8 magnets, yielding appropriate permeability values.