Controlled induction motor drives supplied by frequency converters on belt conveyors — modeling and commissioning

During the past two decades, drive and control system of belt conveyors on open pit lignite mines have seen significant advances. The main demand for new construction of belt conveyors was the increase of reliability, unit capacity, minimization of personal, reduction of maintenance cost, increase of safety, reduction of consumed energy, etc. The paper presents detailed mathematical model of the belt conveyor suitable for analyses of both static and transient operating regimes. The model includes electrical drive system of the conveyor, and the mechanical part, with the special attention given to the elastic nature of the belt. Simulation results of the developed model for the drive with frequency converter are presented. Experimental results from the field measurements confirm the validity of the model.