Rotary position sensor with improved bearing tolerance
US5982170A · kind A · utility
19Cited by
10References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Nov 24, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2401/172
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An angular sensor has a shaped dual magnet structure carried upon a pole piece having a generally "c" shaped cross-section. The magnet and pole piece define a generally circular linear field which is concentric about the axis of rotation of the complete rotor. A Hall effect device is inserted into the open portion or gap between the two magnets and is exposed to a well defined field. Through the use of particular magnet materials and a magnet geometry extending from the axis of rotation to a point well beyond the Hall sensor, a precise and yet tolerant magnetic circuit is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.