Rotor digital position measurement method for an electric motor, in which the rotor position signal is converted into a digital value with at least 2-bit resolution

摘要

A method for operating an electric motor with a stator and outer rotor (40) that has a multi-polar (55) sensor magnet (54) and at least one rotor position sensor (42, 44) attached to the stator. The method has the following steps: generation of a rotor position signal dependent on the rotation of the sensor and application to a position evaluation device and; conversion of a rotor position signal into a digital value with at least 2-bit resolution. An Independent claim is made for an electric motor with a sensor arrangement for output of digital position signals.