Screening system for magnetic rotary-encoder sensor system
US11333527B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2019 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Feb 25, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K11/215
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A screening system for a magnetic rotary-encoder sensor system in an environment of a machine including a magnetic noise field, wherein the rotary-encoder sensor system comprises a magnetic sensor, a pole wheel, and preferably a pole-wheel carrier, wherein the pole wheel comprises in a circumferential direction a plurality of permanent magnets of alternating magnetic polarity generating a useful field, wherein the pole-wheel carrier is configured to be mounted in a rotationally-fixed manner to a rotating machine shaft extending axially, rotational speed and/or angular position of which is to be determined by means of the rotary-encoder sensor system, wherein the magnetic sensor is positioned, in a mounted state of the rotary-encoder sensor system relative to the machine shaft, in a rotational plane of the pole wheel, which can affect the noise field, and directly opposite to the pole wheel, wherein the screening system comprises at least one magnetically conducting, preferably machine-fixed, deflection element being formed and dimensioned such that in the mounted state a measuring volume, which is substantially free of the noise field, is established, to which the magnetic sensor, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.