Application of a Synchronous Reluctance Electric Drive in a Cold Rolling Mill

The main objectives of any production are to increase productivity and reduce costs. Rolling production is no exception. This article discusses the modernization of the rolling mill by replacing the tube turning drive. At present, the pipe turns are carried out through a mechanical transmission by taking power from the main drive. The purpose of the article is to develop an automated system for the electric drive of the pipe turning, needed for the implementation of the technological process of cold rolling of pipes. On the basis of the given technological requirements, it is necessary to develop an electric drive of the mill with improved indicators of positioning of the working mechanism, and with the highest speed. This article analyzes the operation of the mill tube turning mechanism, compiles its description, identifies problematic issues and collects data. The main disadvantages of the existing system are identified and a solution is proposed that excludes them. For the electric drive of the pipe rotation, it is proposed to use a high-torque synchronously reactive machine. Application of an electric motor with a high overload capacity in combination with a high-speed control system, not only meets all technological requirements, but also makes it possible to provide the required angle of pipe rotation at high rolling speeds. This study showed that the implementation of this project solves the following tasks: Technical re-equipment of the enterprise – replacement of outdated equipment with a high degree of moral and physical wear and tear with modern equipment with the possibility of automation; Improving the reliability of equipment, reducing operating costs, reducing the time of non-standardized downtime due to breakdowns of equipment, distribution – feeding mechanisms (overtaking clutches, lever and cam units, etc.); Increase in rolling speed and mill productivity due to the use of a high-speed control system.