Field strength position sensor with improved bearing tolerance in a reduced space
US5712561A · kind A · utility
36Cited by
10References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1996 |
| Grant date | Jan 27, 1998 |
| Priority date | — |
| Expiry date | Jun 7, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2401/172
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A position 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 selected geometries and particular magnet materials, a precise, compact and yet tolerant magnetic circuit is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.