Hall Effect position sensor with flux limiter and magnetic dispersion means
US5321355A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1992 |
| Grant date | Jun 14, 1994 |
| Priority date | — |
| Expiry date | Oct 14, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/9517
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A low cost Hall effect position sensor is disclosed which includes a Hall effect integrated circuit disposed in close proximity to a metallic target device. The Hall device is mounted in a slotted flux dispersion pole piece. The slotted magnetic flux dispersion pole piece is designed to disperse a highly concentrated magnetic flux field from a magnet, typically an Alnico or rare earth magnet, into a low intensity magnetic flux field which is compatible with the Hall effect device as well as constant and evenly dispersed across the face of the slotted pole piece. The slotted pole piece is designed so that the magnetic flux differential in an air gap between the dispersion pole piece and a ferrous target is increased when compared to the magnetic flux differential of a non-recessed dispersion pole piece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.