POLARISED ELECTROMAGNETIC DRIVE Russian patent published in 2009 - IPC H01F7/122 

FIELD: electricity.

SUBSTANCE: invention refers to electric engineering, specifically to switching devices, and can be used to protect rectifying installations against reverse currents. Polarised electromagnetic drive contains magnetic conductor with magnetising coil, constant magnet, main armature with cutoff spring and trip-free release armature with trip-free release spring. Technical result is achieved due to the fact that magnetic conductor is made of two pairs of identical rods. Magnetoconductive insert is installed between each pair of rods. In the first pair of rods constant magnet is installed as such insert, and in the second pair of rods magneticonductive magnet frame is installed. Additionally, two pairs of rods are separated among themselves by element made of insulating material.

EFFECT: enhancement of design produceability, reliability of operation with retention stability of magnetic characteristics of constant magnet throughout the whole service life and elimination of interference between magnetic fluxes of two magnetoconductive loops.

3 dwg