Arrangement, method and sensor for measuring an absolute angular position using a multi-pole magnet
US10830612B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2019 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | Apr 16, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/24438
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for measuring an angular position of a rotor with respect to a stator, wherein the rotor is rotatable around a rotation axis, the system comprising: a magnetic source mounted on the rotor, having at least four magnet poles and providing a periodically repetitive magnetic field pattern with respect to the rotation axis; a sensor mounted on the stator and comprising a plurality of sensor elements for measuring at least one magnetic field component of the magnetic field and for providing a measurement signal thereof; the sensor being located substantially centered around the rotation axis, in a plane substantially perpendicular to the rotation axis at a first distance from the magnetic source; the sensor elements being located substantially on a circle at a second distance from the rotation axis; a calculator that determines the angular position by calculating it from the measurement signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.