US 11,913,975 B2
Current sensor device and method for assembling such a device
Radjy Ramlall, Lamentin (FR); and Benoit White, River Edge, NJ (US)
Assigned to MERSEN FRANCE AMIENS SAS, Amiens (FR)
Appl. No. 17/596,969
Filed by MERSEN FRANCE AMIENS SAS, Amiens (FR)
PCT Filed Apr. 29, 2021, PCT No. PCT/FR2021/050740
§ 371(c)(1), (2) Date Dec. 22, 2021,
PCT Pub. No. WO2021/219962, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. 2004293 (FR), filed on Apr. 30, 2020.
Prior Publication US 2022/0268813 A1, Aug. 25, 2022
Int. Cl. G01R 15/20 (2006.01); G01R 19/00 (2006.01)
CPC G01R 15/202 (2013.01) [G01R 15/207 (2013.01); G01R 19/0092 (2013.01)] 16 Claims
OG exemplary drawing
 
1. Current sensor device for monitoring the current passing through a brush, comprising:
a brush holder extending in a longitudinal direction between distal and proximal ends, and defining a through housing intended to receive, slidably in the longitudinal direction, a brush so that one end of the brush intended to brush against a rotating movable surface protrudes from the brush holder at its distal end,
a Hall effect sensor arranged to detect a magnetic field,
a concentrator arranged to concentrate the magnetic fields inside a concentrated magnetic field zone and to protect this zone from the external magnetic fields, wherein
the concentrator is mounted on the brush holder so as to surround at least a part of the brush when the latter is received inside the housing of the brush holder, in particular in a plane perpendicular to the longitudinal direction,
the Hall effect sensor is mounted on the brush holder at a position located inside the concentrated magnetic field zone, so as to measure a value representative of the intensity of the current passing through the brush when the latter is received in the housing of the brush holder.