Electromagnetic system

Details Electromagnetic system Electromagnetic system

1974-12-26

1977-09-20

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335234, 335236, H01F 708

Patent

active

040500438

ABSTRACT:
A system for a relay is disclosed having a permanent magnet for bias and electromagnetic energization for changing the disposition of an armature. A magnetic shunt path is provided for the permanent magnet serving as a basic load on the magnet, in that the magnetic resistance of magnet plus parallel shunt is lower than the resistance of the remainder of the magnetic circuit. The shunt has preferably resistance that declines with field strength and the flux at the work point (external excitation zero) plus field as set up by the magnet times its permeability should exceed 6000 Gauss.

REFERENCES:
patent: 2511114 (1950-06-01), Lavery
patent: 3441883 (1969-04-01), Alletru

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