Dynamical torque-speed-curve adaption to damp load peaks occuring in drive trains of shredding plants

Comminuting processes, which provide the required mechanical power for the process cause stochastical loads with high amplitudes in the electromechanical drive train. In the long run, peak loads cause 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 comminuting units. 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.