Integrated torque and speed controller for continuous strip processing rollers

A new integrated torque and speed control algorithm has been proposed for the load balancing of rollers in a continuous strip processing line. Using the proposed method, the output torque and speed can be controlled to follow the reference in spite of nonideal effects such as the speed reference error and/or the controller gain difference between rolls. This new algorithm can be easily implemented in a motor drive system of each roll as it does not require the torque feedback of the others. Through the simulation and experiments for a simple CSPL consists of four driven rolls, the load balancing performance of the proposed scheme is presented and compared with that of the conventional method.