Flat lamination solenoid
OwnerGary E. Bergstrom, Joseph B. Sealeinventors
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Abstract
A variable reluctance solenoid includes an armature and a yoke located axially beyond one end of the armature. Magnetic attraction across an axial gap between the armature and yoke causes the armature to move axially and close the gap. The armature includes ferromagnetic laminations lying in a plane perpendicular to the axial direction. These laminations may include slots, proportioned and directed to combat eddy currents and reduce moving mass while avoiding creation of flux bottlenecks. The solenoid may have two yokes on opposite sides of the armature, providing reciprocating armature motion.
Claims15
A solenoid comprising a yoke and a ferromagnetic armature capable of axial motion with respect to said yoke, wherein:
- a) said armature approaches said yoke at a limit of said axial motion;
- b) a magnetic flux path through said armature and said yoke achieves a minimum reluctance at said limit of said axial motion;
- and,
- c) wherein said armature is subdivided into laminations lying in planes perpendicular to the axis of said axial motion.
A cylindrical solenoid, including a cylindrical ferromagnetic structure fabricated from spirally wound sheet.
Dependencies are inferred from the claim text.