DC motor shaft position and rotation speed determining method for driving e.g. door, involves generating voltage signal representing switching between segments of collector and brushes, based on comparison between two other voltage signals

摘要

The method involves generating and treating a voltage signal (URS) image of a current signal (IM) supplying a direct current motor, for obtaining another image signal shifted temporally with respect to the former signal. A third voltage signal (UC3) representing switching between segments (L) of a collector and brushes (B) is generated based on comparison between former two signals, to calculate position and speed of motor a shaft. An independent claim is also included for an actuator for operating a mobile unit of a building.