High speed reciprocal electromagnetic actuator with cancelled re

Details High speed reciprocal electromagnetic actuator with cancelled re High speed reciprocal electromagnetic actuator with cancelled re

1982-08-09

1984-10-23

Goldberg, E. A.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361191, 335255, 335266, 335268, H01H 5122, H01F 708

Patent

active

044791623

ABSTRACT:
An electromagnetic actuator is provided by a single armature plunger that reciprocally shuttles between two magnetic paths provided by a pair of coils. Undesired retarding-flux is cancelled in overlapping linkage paths through the plunger, yielding increased net magnetic force in the intended direction of movement and faster plunger operation. When either coil is energized, a primary flux path is created around that coil through the plunger, and a secondary flux path is created around both coils through the plunger. The primary path attracts the plunger to close a magnetic air gap. The secondary path holds the plunger in place. Current to the ON coil is also supplied through a limiting resistor to the OFF coil to generate reverse polarity flux in the latter cancelling secondary flux from the ON coil.

REFERENCES:
patent: 2082121 (1937-06-01), Rypinski
patent: 3183410 (1965-05-01), Flora
patent: 3784943 (1974-01-01), Morkowitz et al.

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