Inductive position sensor for determining the angular position of a rotating shaft
US5300882A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1992 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Mar 16, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2046
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The sensor comprises a field coil generating a time-variant magnetic field, and sensor coils arranged inside the field coil, a rotatable device being arranged for modulating the magnetic flux passing through the sensor coil according to its angular position. Each sensor coil comprises a magnetically permeable core having a polar portion facing the rotatable device. A portion of a magnetically permeable sealing element is arranged facing the rotatable device on the opposite side from said polar portion. The air gaps between said polar portion and rotatable device, and between said portion of the sealing element and said rotatable device, are wholly located substantially within the field coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.