DC electromagnet equipped with a voltage surge damping device

Details DC electromagnet equipped with a voltage surge damping device DC electromagnet equipped with a voltage surge damping device

1985-06-25

1987-10-13

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335245, H01F 710

Patent

active

047001658

ABSTRACT:
A voltage surge damping device for electromagnets is provided which applies more particularly to electromagnets of the type comprising a fixed magnetic circuit and a mobile magnetic circuit cooperating with the fixed magnetic circuit and forming therewith, in the "closed" position, at least one air gap. Said device comprises at least one short circuiting ring mounted on the fixed magnetic circuit and formed by a good electrically conducting and a magnetic metal sheet, and having at least one part shaped so as to extend into said air gap.

REFERENCES:
patent: 1789417 (1931-01-01), Shepard
patent: 2944195 (1960-07-01), Mobarry
patent: 4177440 (1979-12-01), Merlette
patent: 4262877 (1981-04-01), Lang

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