Angular position sensor and angular position determination means equipped with several of these sensors
US4870358A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1987 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Jun 26, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25J19/027
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An angular position sensor for determining the relative angular position of two relatively rotatable ferromagnetic coaxial components, such as a rotor and stator. The components have the same number of regularly distributed teeth and the teeth in one component are separated by an air gap from the teeth in the other component. A plurality of coils are connected in series with each other and are disposed around the teeth in one of the components and correspond in number to the number of associated teeth. An electric excitation signal having a measurable constant electrical characteristic is fed to the plurality of coils from a source. The characteristic is modulatable in response to variations in the magnetic reluctance of the air gap effected by changes in the relative angular position between the two components. Electronic circuitry is connected to coils for measuring the modulation of the characteristics to determine the relative angular position of the components. In angular position determination apparatus comprising a plurality of angular position sensors, mechanical connections are provided between the rotors on the one hand and the stators on the other. The angular displaceme…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.