Tractive magnet with asymmetric permanent air gap

Details Tractive magnet with asymmetric permanent air gap Tractive magnet with asymmetric permanent air gap

1992-09-16

1993-09-07

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335131, 335277, H01F 712, H01H 5060

Patent

active

052433137

ABSTRACT:
An E shaped stationary magnet/moveable armature combination for use in an electromagnetic contactor. The magnet has three legs; two outer legs and an inner leg. The armature can be a single, essentially rectangular bar or have three legs corresponding to the legs of the magnet. The moveable armature is caused to contact the magnet by a magnetic field created when electrical current is applied to a current carrying coil. An outer leg of the magnet and/or armature is arranged such that an air gap remains between an outer leg of the magnet and armature. The provision of an air gap in an outer leg reduces noise emitted from the electromagnet.

REFERENCES:
patent: 4739293 (1988-04-01), Hurley et al.

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