Closed loop servo control system
US4692678A · kind A · utility
Inventor
Key dates
| Filing date | Oct 2, 1986 |
| Grant date | Sep 8, 1987 |
| Priority date | — |
| Expiry date | Oct 2, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/41337
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method for controlling a closed loop linear position servo-motor having an armature including a first group of excitation windings and a second group of excitation windings, and a stator including field magnets disposed radially opposite the first winding group, and feedback windings disposed radially opposite the second winding group. The method includes the steps of: applying a positional zero reference to the feedback windings, the zero reference correlating to a nominal zero position of the armature; monitoring time-dependent changes in the electromagnetic coupling between the feedback windings and the second armature winding group, relative to the coupling value of the zero reference; translating the electromagnetic coupling changes into a positional data signal; and reiteratively applying the compensation current to the second winding group to compensate the value of the electromagnetic coupling to positionally regulate the armature in conformance with external program control signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.