MAGNETIC FIELD SENSOR DEVICE FOR MEASURING THE CURRENT FLOWING THROUGH A CURRENT-CARRYING CONDUCTOR

摘要

The invention relates to a magnetic field sensor device (10, 66, 100, 102, 104, 106, 108, 114, 116, 118) for measuring the current of at least one current-carrying conductor (12), comprising a plurality of magnetic field sensor elements (14) which are arranged around the conductor (12) along a closed curve (16), preferably a circular, rectangular, or elliptical curve, and which have a preferred magnetic field-sensitivity direction substantially tangential or parallel to the curve (16). The magnetic field sensor device also comprises a magnetic field generating device (20). The magnetic field generating device (20) comprises at least one magnet element (24), preferably multiple permanently magnetic abutting magnet elements which follow the course of the curve, said magnet element(s) generating an auxiliary magnetic field (22) at the location of the magnetic field sensor elements (14), wherein the auxiliary magnetic field is oriented substantially at a right angle to the course of the curve (16) of the magnetic field sensor element (14). A secondary aspect relates to a current clamp (60) which comprises the aforementioned magnetic field sensor device (10, 66, 100, 102, 104, 106, 108, 10, 112, 114, 116, 118).