High performance IM speed control for torsional system with an equivalent disturbance observer

The authors investigate a speed control method for an induction motor drive system in which flux vector control is applied to the system. A zeroing technique with an equivalent disturbance observer and predictive controller is used to achieve fast and robust control of the system. It is experimentally observed that the proposed control system is insensitive to system parameter variations and the external variable loads, and has a quick time response. The experimental results show that the proposed controller is superior to a conventional PI (proportional plus integral) controller