ELECTROMAGNETIC OPERATING MECHANISM Russian patent published in 2007 - IPC H01H33/42 

FIELD: electrical engineering; vacuum switches and circuit breakers.

SUBSTANCE: proposed device has ring-shaped case accommodating coaxial coil, core that has cylindrical boss and is made of magnetically soft material, as well as flange. Case is made of magnetically soft material. One end of case and butt-end of core are joined together on cylindrical boss end by means of flange; nonmagnetic rod is disposed in core and flange holes for axial displacement . Rod is coupled with disk-shaped armature whose diameter is greater than inner diameter of case; rod has at least one flat end disposed opposite ends of core and case opposing those joined by flange; coil is disposed in space between part of core having smaller diameter and case; at least one permanent magnet saturated in radial direction is placed between case and cylindrical boss of core, axial size of core boss being greater than that of permanent magnet.

EFFECT: enhanced force of armature attraction to fixed part of magnetic circuit.

1 cl, 1 dwg