Overcurrent Mitigation in a Crop Cobble Shear System for Steel Rolling Mill

EasyChair Preprint 727

Abstract

The paper describes the utilization of the Direct Torque Control (DTC) drive technology to control the Crop Cobble Shear (CCS) system in a steel rolling mill. The CCS is a highly dynamic load that requires a drive capable for high performance torque control. During the CCS cobble cutting mode, depending on the bar length, the original DTC drive experienced overcurrent faults that cause production downtimes. A suitable model developed for the overall system provided the parameters, considered for simulating the system. Simulation analysis of the CCS operation, made possible performance improvement. The simulated DTC induction motor drive faced a comparison with the existing system from a steel plant. Measured data from the original system in the steel mill compared to results determined through simulations. This comparison shows the successfully simulated system, appropriate for the determination of a suitable approach to improving the CCS operation. Identification of new control strategies recommended carrying out new simulations regarding the modified system. Furthermore, follow this new round of simulations, the overall system, subjected to new modifications at this stage, suffered a reassessment through measurements: they certified an improvement. The paper contains useful results, obtained through simulations and measurements as well. The last section contains the conclusions of this work.

Keyphrases: Crop cobble shear, Direct Torque Control, cobble cutting current, short term overload, stator voltage flux vector, stator voltage space vector

@booklet{EasyChair:727,
  author    = {David Carpenter and Sorin Deleanu and Herbert Hess and Gary Ng},
  title     = {Overcurrent Mitigation in a Crop Cobble Shear System for Steel Rolling Mill},
  doi       = {10.29007/vfs3},
  howpublished = {EasyChair Preprint 727},
  year      = {EasyChair, 2019}}