ELECTROMAGNET COMPRISED OF YOKES AND AN ARMATURE SUPPORTING A PERMANENT MAGNET FITTED ON ITS POLE FACES WITH POLE PIECES THAT PROJECT FROM THE AXIS OF THE MAGNET, THIS AXIS BEING PERPENDICULAR TO THE DIRECTION OF MOVEMENT

摘要

The electromagnet comprises the yokes (31, 32a) which are moveable in relation to an armature (21a) and a winding (25) surrounding a part of the magnetic circuit, this armature (21a) comprised of a magnet (22a) fitted with two pole pieces (23a, 24a) projecting past both extremities of this magnet, at least one of the said pole pieces having its extremities bent at right angles in order to define the air gap inducing counter forces following a direction perpendicular to the axis of the permanent magnet (22a).PPA second armature (21b) identical to the first (21a) is located parallel to and facing the first. Two yokes (31; 32a, 32b) join the air gap zones of the two armatures located facing each other in such a way that the magnetic circuit constitutes a sequence of armature and yoke forming a rectangle. Two windings (25, 28) are located on opposite sides of the above-mentioned rectangle.PPApplication primarily in the construction of electromagnets of low inertia, small volume and low leakage flux.