Antriebseinrichtung zum Bewegen eines Bauteils wie Fensterscheibe, Schiebedach eines Fahrzeugs

摘要

The operating drive (2) has a reversible electronically-commutated multi-phase motor (3) and a safety cut-out circuit, for preventing an object being trapped by the movable component, which evaluates the variation in a current or voltage signal frequency proportional to the rate of rotation of the motor, obtained from one of the current leads coupled to one of the motor field windings.