LONG-STROKE ELECTROMAGNET WITH CONSTANT TRACTIVE FORCE IN OPERATING STROKE Russian patent published in 2020 - IPC H01F7/13 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, namely: to drives containing electromagnets, and can be widely used in various fields of equipment, in particular, in drives of valves installed on gas and liquid lines. Long-stroke electromagnet with constant pulling force at the working stroke contains a coil, an armature placed with the possibility of retraction into the coil under action of an electromagnetic field, a diamagnetic sleeve in which the armature moves, and a spring placed in the sleeve. Diamagnetic sleeve on the outer side contains a ferromagnetic collar, and on the other side a ferromagnetic pole is installed inside the sleeve, at the same time a ferromagnetic shunt is installed on the outer side of the sleeve on the ferromagnetic pole installation side.

EFFECT: simpler design of a long-wave electromagnet, its manufacturing technology, as well as higher reliability of operation.

1 cl, 1 dwg