Recent Development of Motor Speed Control System and It's Application to Seamless Pipe Mill

Abstract

Recent progress of main motor speed control apparatus using power electronics devices applied for rolling mills especially seamless pipe mills have contributed Recent to the advancement of quality of products. Both quick response and precise control of motor speed are the main advantage of recent motor speed control apparatus.
The overview of this development and its application to seamless pipe mills in Wakayama steel works including new seamless pipe mill are described.