Rotary-segment electromechanical system with reluctance boost

An electromechanical system for an electrical switching device, comprising:

• an energizing coil assembly including a first coil and a second coil each generating a magnetic field in response to an energizing current;
• and
• a magnetic system providing a magnetic flux path passing along a plurality of magnetic flux lines of the magnetic field generated by the energizing coil assembly, the magnetic system including:
• a first pole member arranged on an upper side of the first coil;
• a second pole member arranged on an upper side of the second coil, the first pole member and the second pole member each have a first end portion arranged outside the first coil and the second coil, the first end portions are parallel to each other and to a first coil axis of the first coil;
• and
• a rotation member arranged between the first pole member and the second pole member, the rotation member having a first lobe and a second lobe executing a rotation motion around a central axis aligned along an intersection of a plane parallel to the first end portions with a plane transverse to the first coil axis, the first end portions direct a plurality of magnetic field lines generated by the first coil and the second coil toward the first lobe and the second lobe, respectively, and produce a resultant magnetic force that causes the first lobe and the second lobe to execute the rotation motion toward the first pole member and the second pole member, respectively, upon energizing the energizing coil assembly, at least one of the first end portions and one of the first lobe and the second lobe facing the at least one first end portion have a plurality of reluctance-boost shape contours that are matching and reduce reluctance when the one of the first lobe and the second lobe enters into contact with the at least one first end portion during the rotation motion, one of the reluctance-boost shape contours of the at least one first end portion has a shape of a step recess with a curved side wall defined by a circular segment of a given length on a plane transverse to the central axis.