Magnitude calculation in a magnetic field angle tracking system
US12007234B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2021 |
| Grant date | Jun 11, 2024 |
| Priority date | — |
| Expiry date | Jan 22, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/0082
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic field sensor configured to sense an angle of a magnetic field associated with a rotatable target includes a first magnetic field sensing structure configured to generate a first signal indicative of the magnetic field and a second magnetic field sensing structure configured to generate a second signal indicative of the magnetic field, wherein the first and second magnetic field sensing structures are configured to detect quadrature components of the magnetic field. A controller responsive to the first and second signals includes an angle tracking observer having a sine block and a cosine block operatively coupled to compute the angular position of the target using a control loop based in part on a non-orthogonality error term and a magnitude calculator that uses the sine block and the cosine block to compute a magnitude of the magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.