Apparatus to detect a torque acting on a shaft

摘要

Device for determining the torque between two shaft sections that move relative to each other, comprises a multipolar magnetic ring (24) arranged around the first shaft section (14) and a stator support (30) with two stator elements (26, 32) fixed to the second shaft section (12). Each stator has axially extending fingers equally distributed around its circumference. The fingers (34, 36) form holes between themselves with the fingers of each section linked by a flux ring. A magnetic flied sensor (44) has flux concentrators between the flux rings of the stator elements.