ANTRIEB FÜR EIN WOHNGEBÄUDE MIT EINEM DREHZAHLVARIABLEN ELEKTRISCHEN ASYNCHRONMOTOR

摘要

The actuator (ACT) has an electric induction motor (MOT) supplied at constant frequency for driving a mobile element (LD) in opposite directions. A locking brake (BRK) e.g. disc type brake, locks the movements of the element in the absence of movement of the motor, where the brake is of differential type. A cut off device including a triac reduces an effective value of supply voltage of the motor. The brake is arranged such that the motor always operates as motor. An independent claim is also included for a method for adjusting the speed of rotation of an electric induction motor of an actuator.