Rotatable control signal generator
US4962331A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 1989 |
| Grant date | Oct 9, 1990 |
| Priority date | — |
| Expiry date | Jul 13, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K19/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotary control signal generating device, such as a resolver, which comprises an internal stator including a magnetic system having first and second ring-shaped pole pieces with generally cylindrical, axially spaced, outwardly facing first and second pole surfaces. These pole surfaces are generally concentric with respect to a central axis and have the same outer diameter. The two pole pieces each include a given number of equally spaced coil receiving slots with axially spaced pole pieces aligned to form sets of circumferentially spaced slots. The stator includes a multiturn or primary exciter winding between the two pole pieces and wound concentric with the axis, whereby an AC voltage magnetizes the pole pieces. The stator further includes two offset sensing windings on the same pole pieces and in the axially aligned sets of slots. The resolver includes an external rotor with a high permeability flux concentrating ring having an inwardly facing, cylindrical surface concentric with the axis and spaced slightly outward in a radial direction from the first and second pole surfaces. The inwardly facing surface of the flux concentrating ring is axially skewed a distance correlated wi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.