High bandwidth open-loop current sensor
US7977934B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2008 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Feb 22, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/207
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Open-loop electrical current sensor (1) for measuring the electrical current flowing in a primary conductor, comprising a magnetic circuit (3) with an air-gap (4), and a magnetic field sensing device (5) positioned at least partially in said air-gap. The magnetic field sensing device comprises a circuit board (7), a first magnetic field detector (8) mounted on the circuit board, and a second magnetic field detector (11). The second magnetic field detector comprises a conductive coil formed on the circuit board, the output signals of the first magnetic field detector and the second magnetic field detector being adapted for connection to a signal processing circuit (6) generating an output signal representative of the primary electrical current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.