Process for detecting abutment and blocking in an electric motor

Abstract

In a stop and jamming detection system in an electric motor, in particular a stepping or commutator motor, a parameter is determined by current measurement, from the profile of the instantaneous current by comparison with a reference value, as a signal for the stop and jamming detection system. In addition to sensing the current flowing through a winding of the motor, the instantaneous operating voltage and the resistance of the motor winding are sensed. All three parameters are conveyed to an analysis circuit. By comparison with reference values, a determination is made by the analysis circuit as to whether the motor is jammed or movable. Reliable and economical stop and jamming detection system for an electric motor, which is used in particular in a wide variety of operating conditions in motor vehicles.

Dependencies are inferred from the claim text.