US 12,306,217 B2
Current sensing with positioning stability
Simon Houis, Bevaix (CH)
Assigned to Melexis Technologies SA, Bevaix (CH)
Filed by Melexis Technologies SA, Bevaix (CH)
Filed on Nov. 29, 2022, as Appl. No. 18/070,953.
Claims priority of application No. 21217901 (EP), filed on Dec. 28, 2021.
Prior Publication US 2023/0204632 A1, Jun. 29, 2023
Int. Cl. G01R 19/00 (2006.01); G01R 15/20 (2006.01)
CPC G01R 19/0092 (2013.01) [G01R 15/202 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A sensing system for contactless sensing of current passing through a conductor, the sensing system comprising:
a conductor for generating a magnetic field as electric current flows through the conductor, the conductor having a predetermined width and comprising a hole with a predetermined hole width passing through the whole thickness of the conductor, and
a differential magnetic sensor for measuring at least one component of the magnetic field generated by the conductor,
wherein the sensing system is configured to sense current on the basis of a difference of the measured magnetic field measured at two different positions,
wherein the magnetic sensor overlaps the hole,
wherein the magnetic sensor is positioned at a predetermined distance over the plane of a top surface of the conductor,
wherein an axis is defined at the center of the hole passing through the thickness thereof and the magnetic sensor is centered over the axis of the hole,
wherein the width of the hole is at least 0.15 times the width of the conductor.