Bistable electro-magnetic mechanical actuator

专利名称：Bistable electro-magnetic mechanical

actuator

发明人：Frederik T. van Namen申请号：US09843478申请日：20010425公开号：US06512435B2公开日：20030128

专利附图：

摘要：A novel bistable actuator of the coaxial plunger type, requiring only a singleelectrical coil and a single permanent magnet, provides electrical remote control ofextension and retraction of a locking pin in a linear power stroke whose two end

conditions require no power and are stabilized by the magnet against environmentalacceleration as required for missile or aerospace component locking requirements. Thecoil is located in a cylindrical soft iron stator shell that acts as a magnetic yoke handlingthe flux loop from the permanent magnet which, fitted with circular end pole plates,forms a moving armature/plunger driving the locking pin. A specially shaped bobbincarries the coil in the shell/yoke and also forms a tubular guide that confines movementof the armature to axial sliding. The shell/yoke is shaped to form two radial air gaps inthe flux loop path of the armature magnet: a working gap traversing a portion of the coiland a return gap outside the coil. Both gaps remain constant over the major extent of thestroke so that the actuator functions in the mode of a speaker voice coil when DC isapplied to the coil to move the armature between the stable stroke-ends, the directionbeing reversible according to the DC polarity. The magnetic holding force at the strokeends can be independently adjusted in design.

申请人：WILLARD CHARLES,VANNAMEN FREDERIK T.,MOTRAN INDUSTRIES, INC.

代理人：J. E. McTaggart

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