MRS current sensor

Details MRS current sensor MRS current sensor

Filed on

1987-06-11

Date issued

1989-06-20

Examiner

Karlsen, Ernest F.

Patent Class

Electricity: measuring and testing

SubClass

Measuring, testing, or sensing electricity, per se

SubSubClass

Magnetic saturation

Other Related Categories

324127, 324252, G01R 1900, G01R 3302

Type

Patent

Status

active

Patent number

048412350

Description

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.

REFERENCES:
patent: 2946955 (1960-07-01), Kuhrt
Middelhoek, Si, "Magnetic. . ." IBM Tech. Dis. Bull.; vol. 4; No. 6; Nov. 1961; pp. 42-43; Gusev et al.; Measurement. . .;1975; pp. 952-955.

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