| 摘要 |
The invention relates to a method for regulating an electric-motor-driven adjusting device, in particular for vehicles, having a safety circuit (5) for reversing or stopping a drive motor, and to an apparatus for performing this method. To enable fast, safe detection in the event of something becoming caught or pinched, it is provided that an actual value is regulated via a closed-loop control circuit to a set-point value, the actual value or set-point value is a signal having a frequency proportional to the rpm or load on the drive motor, and the phase difference detected with a comparison member of the control circuit is utilized to activate the safety circuit. The apparatus for performing the method is characterized by a control circuit having a set-point value transducer and an actual value transducer, in which as the set-point value or actual value, a signal proportional to the rpm or load of the drive motor is processed, and having a comparison member, such as a phase-locked loop (PLL) circuit (8), for determining the phase difference delivered to a detection stage which activates the safety circuit. |
