Fluxgate-based current sensor
US9778288B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2015 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | May 25, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Operating a current sensor by conducting a current serially through a first region and a second region of an electrically conductive member. A first magnetic field produced by the current in the first region is sensed using a first magnetic field based current (MFBC) sensor having a first sensitivity. The sensitivity of a second MFBC is reduced. A second magnetic field produced by the current in the second region is sensed using the second MFBC sensor having a reduced sensitivity, in which the reduced sensitivity is lower than the first sensitivity. A magnitude of the current is calculated based on the first magnetic field and the second magnetic field. A dynamic range of the current sensor is extended by calculating a magnitude of the current using the second magnetic field after the first MFBC is saturated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.