TMEIC Supplies Superior Control Systems for Hot Rolling Mills Hot rolling mills roll heated steel, stainless, and aluminum slabs to make hot strip with a thickness of a few millimeters to over ten millimeters. Hot coils are shipped as they are, or moved to another operation and processed to cold rolled sheet, coated steel sheet, or steel pipe.
Rolling mills usually run around the clock, and DC motors may cause downtime and are expensive to maintain such as the continuous need to be machined, and of course, the brushes wear. However, the amount of maintenance on a DC motor, if maintained properly, can be infinitesimal. An advantage of an AC to DC drive or rectifier is the cost.
i am using 6RA80 DC drive controller for DC stand of rolling mill (500kw DC motor), every parameter of controller is perfect but once motor pass a single hot bar,the armature actual voltage and current both start flactuating, i tried to tune this using p50225 and p50226,but it is not usefull, kindly guide me how can we stop this current hunting
At home in rolling mills around the world Our rolling-mill motors are used in almost every rolling mill around the globe – whether as drives for all hot and cold rolling mills or as drives for plate stands with the highest torque ratings world-wide. These powerful motors also prove their reliability in section and rod mills
Drive selection for rolling mills Long product rolling mills have stringent requirements for motor drives. The speed drop during head end impact presents the greatest challenge and is dependent on total system inertia and the drive's dynamic performance. Modern AC drives have demonstrated superior performance to DC drive systems.
dc drives used in hot rolling mill - housesforsaleinfrance.eu. dear siri am using 6RA80 DC drive controller for DC stand of rolling mill (500kw DC motor), every parameter of controller is perfect but once motor pass a single hot bar,the armature actual voltage and current both start flactuating, i …
May 13, 2015· Zurich, Switzerland, May 13, 2015-ABB, the leading power and automation technology group, announced that it has successfully commissioned two of Europe's largest synchronous motors, along with the highest power-rated medium voltage (MV) drives ever used in a reversing roughing mill at Tata Steel's Port Talbot hot strip mill in South Wales.
ABB drives in metals | 7 Hot rolling mill Converter configuration Hot rolling mill features Benefits of ABB medium voltage drives Typically very high torques and overloads are required Direct Torque Control (DTC) ensures highest torque quality over the full speed range The rolling mill stand is fed by one motor or by two motors in twin-drive
Rolling Mill Main Drive Technology History Rolling Mill Main Drive technology development Figure 10 illustrates the history of speed controlled drives for large rolling mill drives where DC-motors was used until the beginning of the eighties when the introduction of the cycloconverter enabled the use of synchronous motors
with the years of experience on the hot rolling process, yields increased quality and production rate, reduced scrap material amounts and a more effective rolling process. MAIN FEATURES Main features of a digital hot rolling mill automation system : Typical hot rolling mill automation system is composed of : Digital DC motor drives,
Advanced Control Solutions for Flying Shears to improve both efficiency and reliability of rolling mill Introduction The paper is presenting state of the art automation solution to implement high performances control for shears in long product rolling mills. The main benefits of the systems are the increase
TMEIC2 installed its first AC adjustable-speed motor drive system for a rolling mill main stand in 1980; by January 2004 TMEIC had installed AC adjustable- ... Motors used for continuous hot strip mills, cold tandem mills, cold ... Large AC Adjustable Speed Motors for Metals Rolling Mills.indd 9 10/24/2011 4:20:50 PM. 10 Temperature Rise Limit
The progressive upgrading of the main drives used to drive the rolling mills and down-coiler from DC (direct current) motors to energy-efficient AC (alternating current) motors continues. Also, high-capacity IGBT (insulated gate bipolar transistor) inverter drives are used to control the motors to achieve performance improvements and greater energy
DC motors are used for load hoisting and lowering where smooth, precise and at the same time fast speed control is required as in the case of cranes used in steel plants, power houses and concrete dams. Applications of Industrial Drives > ROLLING MILL DRIVES: The following types of drives are used for rolling mills: (i) DC motors,
for rolling mills for more than 100 years 1897: The first drive with DC motor for a trio rolling mill, Dillinger Hütte 1907: The first Siemens rolling mill motor with rolling mill with DC motor and Ilgner converter is used for a blooming mill be-longing to the Georgs-marienhütte close to Osnabrück, Germany 1908: Copper plate reversing ...
Sprint Electric's high power 4 quadrant DC Drives provide exceptional motor control up to 980kW in rolling mill applications. Rolling mills are used to reduce the gauge or change the shape of metal, mills can be hot or cold roll. Hot roll mills heat up the metal to a high temperature so that shaping and forming can be easily accomplished.
programs for rolling mill plants Siemens Energy & Automation, drives and automation systems for hot and cold rolling mills, proﬁle rolling mills, plantwide automation, computer modeling, mon-itoring and data logging, AGCs, ﬂatness measuring SMS Demag rolling mill technology for the steel and nonferrous metals industries
May 18, 2016· Zurich, Switzerland, May 18, 2016 – ABB has won a contract to replace twin DC motors and associated drives with newer AC motor and drive technology on a hot rolling mill at POSCO's Pohang Works in Korea.Using ABB's large synchronous motors, AMZ, together with ACS6000 medium voltage AC drives, will help improve process efficiency, accuracy and reliability.
ASP Provides Hot & Cold Rolling Mills for Businesses World-Wide. For over 60 years, ASP's rolling mills provided the industry with high production 2-high, 4-high and cluster mills. ASP's rolling mill housings are fabricated from forged alloy steel allowing for high separating forces and high safety factors.