Rotary magnetic position sensor having pole differentiated magnets
US6777928B2 · kind B2 · utility
12Cited by
12References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2002 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Jan 23, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/0294
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention is a rotary magnetic position sensor having a pair of pole differentiated permanent magnets, wherein rotation of a magnetic field relative to a magnetosensitive device provides a varying output of the magnetosensitive device that varies sinusoidally with the angle of relative rotation. The magnetic pole differentiation is achieved by an external asymmetric geometrical feature of the magnets, as for example a wedge shape involving a pole face chamfer or a corner chamfer at a same polarity pole face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.