Magnetic rotational position sensor
US6956368B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2003 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | Mar 31, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D2205/77
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic rotational position sensor comprising a magnetic circuit including a loop pole piece and a magnet, and a magnetic flux sensor adapted to sense varying magnitudes of magnetic flux density associated with the magnetic circuit. The loop pole piece has a peripheral outer wall defining an inner air gap, with the outer wall including an inwardly projecting portion extending into the air gap. The magnet is positioned within the air gap generally opposite the inwardly projecting portion of the loop pole piece. The magnet and the loop pole piece cooperate to generate a magnetic field within the air gap. The magnetic circuit is rotatable about a rotational axis to correspondingly rotate the magnetic field about the rotational axis. The magnetic flux sensor is disposed within the magnetic field to sense a different magnitude of magnetic flux density in response to rotation of the magnetic field about the rotational axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.