Torque motor
First Claim
1. In a force motor adapted to be mounted on a surface of a body, having an armature mounted for movement relative to said body along a line substantially parallel to said surface, having a magnetic structure, said structure having a first polepiece terminating in a first pole face arranged substantially perpendicular to said body and arranged in spaced facing relation to said armature to define a variable-length first working air gap therebetween, having a second polepiece terminating in a second pole face arranged substantially perpendicular to said body surface and arranged in spaced facing relation to said armature to define a variable-length second working air gap therebetween, and having a third polepiece terminating in a third pole face arranged substantially perpendicular to said first and second pole faces and arranged in spaced facing relation to said armature to define a fixed-length non-working air gap therebetween, a coil surrounding said third polepiece, and magnet means arranged in series with said first and second polepieces to oppositely polarize said first and second pole faces, the improvement which comprises:
- clamping means operatively arranged between said structure and body for selectively permitting said structure to be slidably moved along said surface to adjust the lengths of said first and second working air gaps.
5 Assignments
0 Petitions
Accused Products
Abstract
An improved torque motor includes a supporting body (3) having a U-shaped cross-section and formed of a magnetizable material, includes at least two magnet structures (7, 8) adapted to be mounted on the body, includes first polepieces (10-13) mounted on the magnet structures, and includes an armature (5) mounted for movement in working air gaps (16, 17) between the first polepieces. Permanent magnets (10, 11) are mounted on the first polepieces. A second polepiece is spaced from the armature by the presence of a non-working air gap (21). At least one control coil (20) surrounding the second pole between the magnet structures (7, 8).
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Citations
14 Claims
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1. In a force motor adapted to be mounted on a surface of a body, having an armature mounted for movement relative to said body along a line substantially parallel to said surface, having a magnetic structure, said structure having a first polepiece terminating in a first pole face arranged substantially perpendicular to said body and arranged in spaced facing relation to said armature to define a variable-length first working air gap therebetween, having a second polepiece terminating in a second pole face arranged substantially perpendicular to said body surface and arranged in spaced facing relation to said armature to define a variable-length second working air gap therebetween, and having a third polepiece terminating in a third pole face arranged substantially perpendicular to said first and second pole faces and arranged in spaced facing relation to said armature to define a fixed-length non-working air gap therebetween, a coil surrounding said third polepiece, and magnet means arranged in series with said first and second polepieces to oppositely polarize said first and second pole faces, the improvement which comprises:
clamping means operatively arranged between said structure and body for selectively permitting said structure to be slidably moved along said surface to adjust the lengths of said first and second working air gaps. - View Dependent Claims (2, 3, 6)
- 4. The improvement as set forth in clam 3 wherein each of said members is L-shaped and has a base portion terminating in a first end face and has a leg portion extending away from said base portion and terminating in a second end face, wherein said L-shaped members are mounted on said body such that said first end faces are arranged in spaced facing relation to one another, and further comprising a T-shaped member having a cross-bar portion and a depending leg portion, and wherein the opposite marginal end portions of said cross-bar portion are arranged to engage said second end faces.
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7. In a force motor adapted to be mounted on a surface of a body, having an armature mounted for movement relative to said body along a line substantially parallel to said surface, having magnetic structure, said structure having a first polepiece terminating in a first pole face arranged substantially perpendicular to said body surface and arranged in spaced facing relation to said armature to define a variable-length first working air gap therebetween, having a second polepiece terminating in a second pole face arranged substantially perpendicular to said body surface and arranged in spaced facing relation to said armature to define a variable-length second working air gap therebetween, and having a third polepiece terminating in a third pole face arranged substantially perpendicular to said first and second pole faces and arranged in spaced facing relation to said armature to define a fixed-length non-working air gap therebetween, a coil surrounding said third polepiece, and magnet means arranged in series with said first and second polepieces to oppositely polarize said first and second pole faces, the improvement which comprises:
adjustment means for enabling the position of said third pole face with respect to said armature to be varied so as to adjust the length of said non-working air gap. - View Dependent Claims (8)
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11. In a force motor adapted to be mounted on a surface of a body, having an armature mounted for movement relative to said body along a line substantially parallel to said surface, having a magnetic structure, said structure having a first polepiece terminating in a first pole face arranged substantially perpendicular to said body and arranged in spaced facing relation to said armature to define a variable-length first working air gap therebetween, having a second polepiece terminating in a second pole face arranged substantially perpendicular to said body surface and arranged in spaced facing relation to said armature to define a variable-length second working air gap therebetween, and having a third polepiece terminating in a third pole face arranged substantially perpendicular to said first and second pole faces and arranged in spaced facing relation to said armature to define a fixed-length non-working air gap therebetween, a coil surrounding said third polepiece, magnet means arranged in series with said first and second polepieces to oppositely polarize said first and second pole faces, and armature output motion means associated with said armature, the improvement which comprises:
flexure beam means for constraining said armature to move in an arcuate path in a predetermined plane. - View Dependent Claims (12, 13)
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14. In a force motor adapted to be mounted on a surface of a body, having an armature mounted for movement relative to said body along a line substantially parallel to said surface, having a rigid magnetic structure, said structure having a first polepiece terminating in a first pole face arranged substantially perpendicular to said body surface and arranged in spaced facing relation to said armature to define a variable-length first working air gap therebetween, having a second polepiece terminating in a second pole face arranged substantially perpendicular to said body surface and arranged in spaced facing relation to said armature to define a variable-length second working air gap therebetween, and having a third polepiece terminating in a third pole face arranged substantially perpendicular to said first and second pole faces and arranged in spaced facing relation to said armature to define a fixed-length non-working air gap therebetween, a coil surrounding said third polepiece, and magnet means arranged in series with said first and second polepieces to oppositely polarize said first and second pole faces, the improvement which comprises:
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clamping means operatively arranged between said structure and body for selectively permitting said structure to be slidably moved along said surface to adjust the length of at least one of said first and second working air gaps; adjustment means for enabling the position of said third polepiece with respect to said armature to be adjusted so as to adjustably set the length of said non-working air gap; and flexure beam means for constraining said armature to move in an arcuate path in a predetermined plane.
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Specification