Sensor arrangement for detecting electric motor rotational parameter e.g. for vehicle wiper, produces magnetic field change when non-magnetic part can be detected on periphery of part by Hall sensor

摘要

The arrangement has at least one stationary Hall sensor (2) for detecting a magnetic field or a change in a magnetic field. The motor (1) is electrically controlled and/or regulated and a rotating, especially non-magnetic part (3) is provided whose shape is such that a magnetic field change is produced when the part is rotated that can be detected on the periphery of the part via the Hall sensor.