Bistable solenoid actuator

Details Bistable solenoid actuator Bistable solenoid actuator

H - Electricity

01

F

292/4

H01F 7/08 (2006.01) H01F 7/16 (2006.01)

Patent

CA 1306272

ABSTRACT OF THE DISCLOSURE A bistable actuating solenoid device having an axially translatable armature which is stable at either a first or a second position The device employs a solenoid winding wrapped around a bobbin having an internal bore with the armature disposed in the bore A permanent magnet is located at one end of the bobbin for holding the armature in the first position and a spring urges the armature toward the second position When it is desired to move the armature from the first to the second position, a current is passed through the winding such that a magnetic field is generated which opposes the field presented by the permanent magnet to allow the armature to move to the second position under the influence of the spring When it is desired to return the armature to the first position, a current is passed through the winding in a direction which generates a field which combines with that of the permanent magnet to attract the armature to the first position against the biasing force of the spring The armature thereafter remains in the first position due to the attraction force of the permanent magnet.

556406

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