Autori: Grigore Alexandru Cividjian
Editorial: IEEE, IEEE TRANSACTIONS ON MAGNETICS, VOL. 45, NO. 2, FEBRUARY 2009, p.694-700, 2009.
Field modeling becomes simpler if strong field nonuniformities are solved theoretically. The early obtained formulas for 2-D “corner”
and “constriction” permeances pertain to right angle configurations. In this paper, using a conformal mapping, the field in the vicinity
of arbitrary angle vertex is studied and the fringing permeance determined. The results are applied to permeance evaluation of lunate
cross section grooves from the rotors of certain types of reluctance motors. Closed-form expressions are obtained, in good agreement
with finite element analysis. Combined with the finite element method, obtained results offer the possibility to make simpler and more
accurate analytical calculations of motors and other magnetic devices and to better evaluate magnetic forces that act on them.
Cuvinte cheie: Conform mapping, corner permeance, fringing flux, 2-D electric and magnetic field.