Primetals Technologies has won an order from AMAG rolling GmbH, an Austrian aluminum producer, to modernize the drive technology on the four-high cold rolling stand in its Ranshofen plant. The order covers not only the supply of the motors, converters and converter transformers, but also the couplings, disk brakes and mechanical adaptations. Primetals Technologies is, in addition, handling the design, engineering, project management and training as well as the removal and assembly of components, repairs and the supply of spare parts. The purpose of the project is to increase plant availability. The conversion and commissioning work is scheduled to take place during a brief plant shutdown at the end of 2016.
Primetals Technologies previously modernized the drive technology of the four-high hot rolling stand in 2015.The drive solution to be implemented on the four-high cold rolling stand consists of a front/back motor layout for the stand and the coiler, and a single motor assembly for the uncoiler. The rugged, water-cooled induction motors from Siemens are fed by Sinamics Active Front End converters. A Sinamics SM150 converter drives the two 3.3 kV mill motors, each of which has a power rating of 2,200 kW and a speed ranging from 300 to 750 rpm. Sinamics S120 converters drive the 690 V coiler motors, each of which is rated at 500 kW and a speed ranging from 320 to 1050 rpm.Conversion and commissioning are scheduled to take place during a brief plant shutdown at the end of 2016. The challenge will be to convert the rolling stand with as little adaptation work as possible and the shortest possible interruption to production.