ELECTROMAGNETIC ACTUATOR WITH DUAL CONTROL CIRCUITS

摘要

The invention relates to an electromagnetic actuator that includes a first magnetic circuit (1) with a first mobile armature (10) capable of movement relative to a first magnetic yoke (11) and separated from said first yoke by at least one axial air gap (e1, e2). A permanent magnet (16) with radial magnetisation generates a polarisation flow (FU) opposed to the magnetic flows (F12A, F12B) generated by a first winding (12A) and a second winding (12B). The actuator includes a second magnetic circuit (2) magnetically uncoupled from the first magnetic circuit and including a second mobile armature (20) capable of movement relative to a second magnetic yoke (21) via a radial, constant and lasting sliding air gap (e3), the two mobile armatures (10, 20) being mechanically connected so as to move simultaneously between the first and second positions. The second magnetic circuit (2) includes third and fourth windings (22A, 22B).