Rotor position sensor of an electric power steering system for a motor vehicle

摘要

A sensor device is provided with- an electric drive (12), which has a number n of motor pole pairs,- at least two, which are offset relative to one another - hall sensors (5a, 5b) the a common, with respect to an axis of rotation radially arranged magnetic field sensor ring (1) are assigned.the field sensor ring (1) has at least one polar pair, which consists of a magnetic north pole (2) and a magnetic south pole (3), and- each pole (2, 3) has a completely sinusoidal magnetization,- the field sensor ring (1) consists of a magnetizable material, the magnetization is artificially.