Method and device for the common speed control of electric motors arranged on a textile machine

摘要

In order to avoid the disadvantageous influences of supply leads of different length and external fields acting on the supply leads, analogue speed signals at the output of a central controller (1) are converted by means of an A/D converter (3) into digital speed signals, are supplied to the working points (6) where they are converted back into analogue speed signals by means of a D/A converter (12), and are used for driving single speed controllers (9) which, for their part, control the respective electric motor (8). <IMAGE>