Position sensor with compensated magnetic poles
US7265685B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 2006 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Feb 8, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2457
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The object of the invention relates to an encoder for a rotary position sensor, including a multipolar magnetic ring driven into rotation around its axis, and provided at its circumference with magnetic poles of a given sign, alternately positioned with magnetic poles of an opposite sign, so as to form at least one series of pairs of magnetic poles with a determined period, each magnetic pole of a given sign having a width Ii and a magnetic polarisation value Mi whereas each magnetic pole of opposite sign has a width Ii+1 different from width Ii and a magnetic polarisation value Mi+1, characterized in that the polarization of the magnetic poles is such that Mi×Ii=Mi+1×Ii+1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.