Two-axis pointing motor
US6326714A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1999 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Oct 27, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2201/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.