Position encoder based on Halbach magnetic element
US12123751B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2022 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | Dec 16, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/0278
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A Halbach-based magnetic position sensor includes a Halbach magnetic element having a spatially rotating magnetization pattern along an extent, producing a focused and augmented magnetic field on a working side relative to a magnetic field on a non-working side. A sensing element on the working side is co-configured with the Halbach magnetic element for relative motion therebetween. The sensing element includes encoder circuitry and magnetic sensors that sense the working-side magnetic field and produce corresponding sensor signals. The encoder circuitry translates the sensor signals into position signals indicating relative position between the sensing element and the Halbach magnetic element. In one example the Halbach magnetic element has a closed curve (e.g., substantially circular or ring-like) configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.