Fail-safe actuator with two permanent magnets

Details Fail-safe actuator with two permanent magnets Fail-safe actuator with two permanent magnets

H - Electricity

02

K

H02K 41/02 (2006.01) F16K 31/08 (2006.01) H02K 33/00 (2006.01) H02K 33/16 (2006.01) H02K 33/02 (2006.01)

Patent

CA 2240876

An electromagnetic actuator has two permanent magnets arranged along their polar axes, with the proximal poles having same polarity. An electromagnet surrounds the two permanent magnets and, when energized, overrides the repulsion between the proximal poles and moves one permanent magnet toward the other fixed magnet. Should the electromagnet fail, the actuator reverts to the unactuated position without need of a spring, gravity and so forth.

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