Bistable electromagnet system for a relay

Details Bistable electromagnet system for a relay Bistable electromagnet system for a relay

1997-10-08

1999-01-26

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Polarity-responsive

335128, 335 80, H01H 5122

Patent

active

058642714

ABSTRACT:
A magnet system has a U-shaped core yoke whose yoke leg and core leg form a magnetic flux circuit together with an armature. A constriction section with reduced cross-section is provided at a location of the magnetic flux circuit, preferably at the core leg; a ferromagnetic bridge element with a flat permanent magnet is coupled to the magnetic flux circuit parallel thereto. Since the constriction section enters into saturation when the armature is attracted, the armature is held fast opposite a restoring spring. As a result of the inventive arrangement, a geometry for a magnetic circuit arrangement that is fast and inexpensive to manufacture is provided.

REFERENCES:
patent: 4064471 (1977-12-01), Schuessler et al.
patent: 4933654 (1990-06-01), Hori et al.
patent: 5574416 (1996-11-01), Maruyama et al.
patent: 5703550 (1997-12-01), Pawlak et al.

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