METHOD FOR IMPROVING RESPONSE OF MAIN MOTOR, BY SIMPLIFYING CURRENT CONTROLLER AND DECREASING CALCULATION TIME OF FEEDBACK LOOP, IN HOT FINISH ROLLING MILL

摘要

PURPOSE: To exclude influence of current controller and obtain good response irrespective of long or short sampling time by simplifying a current controller requiring a very short sampling time, thereby simply replacing the current controller with one gain by reducing calculation time of feedback loop inside main motor. CONSTITUTION: The method is characterized in that the calculated gain send feedback to an automatic speed regulator(11) by simply calculating the gain using a microprocessor(12) instead of an automatic current regulator after inducing first order lag system of the automatic current regulator and a main motor to a simple gain P(s) represented as in the formula 1 by a simplified block diagram method so that good response is obtained irrespective of sampling time to improve current control characteristics of the main motor.