Development of an automated control system for the coiler mandrel drive

Abstract

An automated control system for the coiler mandrel is developed. The causes of emergency situations are identified not only in the industrial conditions, but also from data obtained by reviewing the relevant literature and solving similar problems at other companies. A change in the tension of the strip due to the instability or malfunction of the coiler drive is revealed. This causes degradation in the quality of the rolled strip, its thickness variation, or even breakage. In addition, the installed system does not have a wide range of setpoints, thereby hindering the expansion of the range of rolled steel. One of the main causes of such problems is the outdated coiler mandrel motor and the lack of a proper control system. The developed automated control system is described mathematically. A torque compensation unit maintaining the required level of strip tension is designed. Matlab Simulink software is used to generate a model of an automated control system for the coiler mandrel and to analyze the strip tension and the associated electrical-drive parameters (speed, current, magnetic flux), which confirms the absence of jerks during coiling. The economic benefits of the implementation of this project are calculated. The payback period is about a year.