Method and synchronisation device for synchronising at least two smoke and heat exhaust and ventilation flap drives

摘要

The method involves supplying direct current (DC) motors (1, 2) with a pulse width-modulated voltage. A ripple of commutator current of the DC motors caused by commutation is detected with multiple current sensor signals. A pulse width modulation frequency and harmonic waves are filtered from the sensor signals such that the detected ripple corresponds to a rotational angle and/or a rotational speed of the motors. The voltage is modulated at the motors based on the filtered signals such that smoke and heat extraction- and ventilation damper actuators are synchronously adjusted by the motors. An independent claim is also included for a device for synchronous control of smoke and heat extraction- and ventilation damper actuators.