Patent ID: 7667420

Claim:
A position sensor system for detecting an absolute electrical angular position of a rotor axle of an electric motor at a predetermined angular resolution, comprising: a first Hall sensor device, which has a first sensor magnet set-up, set up on the rotor axle, having a number j of pole pairs and two first Hall sensors, which are physically set up with respect to the rotor axle at an angular offset of 90° divided by the number j of pole pairs so as to achieve a position angle resolution of an electrical angular position of 90°; and a second Hall sensor device, which has a second sensor magnet set-up, set up on the rotor axle, having n pole pairs and a number m of second Hall sensors, which are set up at an angular offset to one another with respect to the rotor axle, the set-up and the number n of pole pairs and the set-up and the number m of second Hall sensors being selected in order to detect angular segments at the predetermined angular resolution within the angular range of the angular offset.