Dynamic speed flexible drive system for shredder-plants with highly restricted control range

Shredder drives, which provide the required mechanical power for the shredding process, are affected by stochastical loads with high amplitudes in the electromechanical drive train. In the long run, peak loads causes premature material fatigue of the drive components alongside high thermal loads in the asynchronous machine. A new drive train with a novel non-linear speed control was developed based on the operating performance of commercial shredder plants. The non-linear speed. control realises a rotational speed-flexible operation so that the rotating masses´ kinetic energy is used to smooth the load peaks from the process. In this way it was possible to reduce the cumulative load in the drive train, achieving high process performance.