UA155302U - Bistable electromagnet - Google Patents

Abstract

A bistable electromagnet contains a fixed part of a magnetic circuit consisting of a ring-shaped body and connected to it upper and lower disk-shaped cores made with central holes and different cross-sectional areas, and a movable part, consisting of a rod, the end parts of which are located in the central holes of the upper and lower cores with the possibility of its reciprocating movement in the axial direction, and a cylindrical armature fixed on the rod, located coaxially inside the housing, two coils are located inside the housing with the formation of a ring-shaped gap between their adjacent ends, and a permanent magnet, in the form of a solid ring-shaped magnet or in the form of separate magnets, for example, in the form of prisms or parallelepipeds, is located in the ring-shaped gap, wherein the height of the permanent magnet corresponds to the distance between the adjacent ends of the coils, the body, cores and armature are made of magnetically soft material, the permanent magnet is made of highly coercive magnetically hard material, and the rod is made of non-magnetic material. The upper and lower cores are made of a cylindrical stepped shape, wherein the step of the core with a larger diameter corresponds to the outer diameter of the body, and the step of the core with a smaller diameter corresponds to the inner diameter of the coil.