Two-axis pointing motor
First Claim
1. In a two-axis pointing motor having a frame and an armature, said armature having an axis passing through a point, said armature being mounted on said frame for controlled omni-directional limited-angle pivotal movement of said axis about said point, said motor having a permanent magnet mounted on said armature and having a plurality of coils mounted on said frame for creating controllable electromagnetic fluxes for urging said armature to pivot about said point, the improvement comprising:
- said armature having a magnetically-conductive surface which is configured as a segment of a hemisphere centered about said point.
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Accused Products
Abstract
The present invention provides an improvement in a two-axis pointing motor (20) having a frame (21) and an armature (22). The armature has an axis (x-x) passing through a point (P). The armature is mounted on the frame for controlled omni-directional pivotal movement of the axis about the point. The motor has a permanent magnet (24) mounted on the armature, and has a plurality of coils (25,25,25,25) mounted on the frame for creating controllable electromagnetic fluxes for urging the armature to pivot about the point. In one aspect, the improvement comprises the coils being positioned such that the entire volume of each of the coils is entirely within an imaginary hemisphere (h) generated about the point. This hemisphere is of arbitrary radius, but encompasses the coils. In another aspect, the improvement comprises the armature having a magnetically-conductive surface (33) which is configured as a segment of a sphere.
43 Citations
13 Claims
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1. In a two-axis pointing motor having a frame and an armature, said armature having an axis passing through a point, said armature being mounted on said frame for controlled omni-directional limited-angle pivotal movement of said axis about said point, said motor having a permanent magnet mounted on said armature and having a plurality of coils mounted on said frame for creating controllable electromagnetic fluxes for urging said armature to pivot about said point, the improvement comprising:
said armature having a magnetically-conductive surface which is configured as a segment of a hemisphere centered about said point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
Specification