Methods and apparatus for frequency effect compensation in magnetic field current sensors
US11047928B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2019 |
| Grant date | Jun 29, 2021 |
| Priority date | — |
| Expiry date | Jul 15, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R35/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A current sensor is provided with one or more magnetic field sensing elements configured to generate a magnetic field signal indicative of a magnitude of a sensed magnetic field, wherein the sensed magnetic field is related to a magnitude and frequency of a current through a conductor. A signal path is responsive to the magnetic field signal and includes a compensator configured to apply a compensation factor to the magnetic field signal to generate a sensor output signal indicative of the magnitude of the current and substantially independent of a frequency of the current. The sensed magnetic field is related to the magnitude of the current by a coupling factor and the signal path is responsive to a characterization of the coupling factor over a range of frequencies of the current in order to determine the compensation factor to be applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.