H - Electricity – 01 – F
Patent
H - Electricity
01
F
310/61
H01F 3/12 (2006.01) H01F 7/08 (2006.01) H01F 7/16 (2006.01)
Patent
CA 1058266
BISTABLE ELECTROMAGNETIC ACTUATOR ABSTRACT OF THE DISCLOSURE An actuator having an armature plate urged to a stable position by a spring and which may be held in another stable position by a permanent magnet. Application of an appropriate current pulse to a coil within the actuator reduces the flux flow through and the magnetic force on the armature sufficiently to release the armature to the former stable position under the influence of the spring. Two magnetic circuits, one of which includes a non-working air gap, are employed, the non-working air gap serving to main- tain a flux path, of a predetermined maximum reluctance, for the permanent magnet when the armature plate is in the former stable position.
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