Research of electric drive at load impact on hot plate mill 5000

This article is devoted to research a load impact on an electric drive, which appears during a metal capturing by work rolls of reversible hot plate mill 5000 of OJSC “Magnitogorsk Iron and Steel Plant” [1]. An analysis of the load impacts has been carried out by electromechanical system simulation of the rolling stand using Matlab application. A mechanical part of the electromechanical system was considered as a double mass system. Causes of the load impact appearance are execution additional torsional vibrations by synchronous motor and deformation resilient elements of drive. Methods of load impact elimination have been offered. Simulated transient processes of torque and speed were presented. It is clearly seen that developed method has been allowed to reduce the magnitude of torque at load impact. Based on the research results, it can be concluded that possibility of reliability improving of rolling equipment and wear reducing of work rolls will be provided via the offered method.