MRS current sensor
US4841235A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1987 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Jun 11, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/205
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A current sensor (10) comprising spaced pole pieces (62, 64) and a magnetic shunt (80) bridging the pole pieces within an insulating housing assembly (12) which also contains a magnetoresistive transducer (90) and electronic circuitry (16) for sensing magnetic field intensity between the pole pieces and relating that intensity as electric signals provided at terminals (26) at the exterior of the housing. The transducer senses magnetic field intensity along a principal axis (88). Permanent magnets (94, 96) or induction coils (276, 278) are provided to establish a biasing component of magnetic field intensity along an axis (98) substantially normal to the principal axis to improve sensor sensitivity, range of operation and immunity to current overload.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.