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dc drives used in hot rolling mill

DC Drives Used In Hot Rolling Mill - YouTube

09/03/2011  DC Drives used in hot steel rolling mill application in Thailand

Characteristics of DC Motors Used in Rolling Mills - Hani Tech

16/08/2019  The characteristics of DC motors for rolling mills, especially intermediate mills and large roughing mills, blooming mill machines, seamless steel tube rolling mills, hot and cold rolling mills, etc. are summarized as follows: (1) The motor capacity is large; (2) often start, accelerate, decelerate and brake; (3) Forward and reverse (reversible operation);

Drive selection for rolling mills - Russula

20/05/2010  Since all drives in the rolling train must have similar performance, early attempts at installing some AC stands in a DC rolling train required the detuning of existing DC drives. Today the opposite is true, the above mentioned rolling mill has a total of 17 stands, with stands 1 to 13 being powered by modern DC digital drives. In this case the four new AC drives were "de-tuned" to match

Design and control of digital DC drives in steel rolling mills

Permanent magnet direct-current (PMDC) motors are used in steel rolling mills, automobiles, conveyors, and various robotics applications due to their controllability, reliability, and low cost [1 ...

Large AC Adjustable Speed Motors for Metals Rolling Mills

a DC motor, M, whereby M = kW × (Top speed)2 / (Base speed) Large AC Adjustable Speed Motors for Metals Rolling Millsdd 2 10/24/2011 4:20:41 PM. 3 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-speed motor drive systems on more than 700 main mill stands, coilers and reels ...

Motors for Metal Rolling Mills TMEIC

AC adjustable speed motor drive systems are the preferred technology for new rolling mill installations and modernization projects. TMEIC designs and manufactures two types of AC solutions for this purpose. Salient pole synchronous motors that meet the high power and torque demands of a hot strip mill, as well as roughing and finishing stands.

Microprocessor-based control of steel rolling mill digital ...

Abstract: Algorithms are presented for the digital control of double-loop DC machine drives used for applications where severe constraints on motor speed and position render conventional constant-torque or power control inadequate, such as in steel rolling mill drives. It is shown that the heavy current demand associated with maximal acceleration control can be reduced by using a form of ...

Design and control of digital DC drives in steel rolling mills

Permanent magnet direct-current (PMDC) motors are used in steel rolling mills, automobiles, conveyors, and various robotics applications due to their controllability, reliability, and low cost [1 ...

ABB drives in metals Medium voltage drives for improved ...

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 configuration ABB offers reliable technology with ...

Large AC Adjustable Speed Motors for Metals Rolling Mills

a DC motor, M, whereby M = kW × (Top speed)2 / (Base speed) Large AC Adjustable Speed Motors for Metals Rolling Millsdd 2 10/24/2011 4:20:41 PM. 3 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-speed motor drive systems on more than 700 main mill stands, coilers and reels ...

Page 1 of 3 DC Motors speed synchronization for rolling mills

DC Motors speed synchronization for rolling mills The project aims at designing a system which is capable of synchronizing the speed of the slave motor (motor-2) with the master motor (motor-1). This system finds very useful in paper mills, steel industries etc..,. The master motor speed can be set manually through the potentiometer available in the system. Industrial environment in day-to-day ...

Rolling mills - SlideShare

20/07/2016  Ac drives or Motors Synchronous motors Salient pole type synchronous Motors o applied for large power and/or heavy torque applications o for example hot strip mill rolling o Excellent torque characteristics o High efficiency o Unity power factor and ease of controllability. AC drive solution for each type of rolling mill application, ranging from large torque, slow-speed rolling mills

6RA80 DC DRIVE CONTROLLER - Entries - Forum -

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

Hot Rolling Mills BLH Nobel

HOT ROLLING MILLS. In a hot rolling mill process, the steel gets heated at extremely high temperature, which is generally above 1100°C. BLH Nobel can provide sensors and complete measurement systems that are highly durable and withstand the extremely harsh environment in the steel industry production sites. Our solutions based on extensive knowledge of the industry challenges with

Optimizing DC drive Bar rolling application - Electric ...

Optimizing DC drive Bar rolling application Optimizing DC drive Bar rolling application mash98 (Electrical) (OP) 17 Mar 13 00:32. We have a bar rolling mill where a dc motor of following specs is being used while the drive for the same is Mentor II (M1850). General Electric Direct current motor No. 2321820 Type MCF HP 1250 RPM 500/910 Form_____ Volt 600 Amp 1632 Exc Volt 250 Wound ...

Industrial Drives and Applications - ElectricalNotesEngine

Parts of electrical drives, choice of electrical drives, status of dc and ac drives, Dynamics of electrical drives, Fundamental torque equation, speed torque conventions and multiquadrant operation. Equivalent values of drive parameters, components of low torques, nature and classification of load torques, calculation of time and energy loss in transient operations, steady state stability ...

Rolling Process: Working, Application, Defects, Type of ...

It is used in slabbing, plumbing, rail, plate roughing work and many other areas. As there is the need for a reversible drive, this mill is cheaper compared to the others. Two High Non-Reversing Mills: In these mills, two rolls continuously revolve in the same direction and we can’t reverse the direction of the rollers. In this operation, the motive power is less costly. 2. Three-High ...

ABB drives in metals Medium voltage drives for improved ...

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 configuration ABB offers reliable technology with ...

Korea’s largest steelmaker chooses ABB to revamp hot ...

18/05/2016  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.

Page 1 of 3 DC Motors speed synchronization for rolling mills

DC Motors speed synchronization for rolling mills The project aims at designing a system which is capable of synchronizing the speed of the slave motor (motor-2) with the master motor (motor-1). This system finds very useful in paper mills, steel industries etc..,. The master motor speed can be set manually through the potentiometer available in the system. Industrial environment in day-to-day ...

Rolling mills - SlideShare

20/07/2016  Ac drives or Motors Synchronous motors Salient pole type synchronous Motors o applied for large power and/or heavy torque applications o for example hot strip mill rolling o Excellent torque characteristics o High efficiency o Unity power factor and ease of controllability. AC drive solution for each type of rolling mill application, ranging from large torque, slow-speed rolling mills to the ...

Hot Rolling Mills BLH Nobel

HOT ROLLING MILLS. In a hot rolling mill process, the steel gets heated at extremely high temperature, which is generally above 1100°C. BLH Nobel can provide sensors and complete measurement systems that are highly durable and withstand the extremely harsh environment in the steel industry production sites. Our solutions based on extensive knowledge of the industry challenges with

Cycloconverter - Wikipedia

CCVs are used for driving mine hoists, rolling mill main motors, ball mills for ore processing, cement kilns, ... Variable speed and reversing are essential to processes such as hot-rolling steel mills. Previously, SCR-controlled DC motors were used, needing regular brush/commutator servicing and delivering lower efficiency. Cycloconverter-driven synchronous motors need less maintenance and ...

Dynamical processes in a multi-motor gear drive of

The increased dynamics in the gear drives of heavy hot rolling mills is occurring due to specific technological loads when pair of driven rolls capture metal in harsh operating conditions with increased wear and backlashes in split path drivelines. Especially significant is the effect of backlashes opening when asymmetry exists in parameters of parallel working electric drives of the machine ...

Optimizing DC drive Bar rolling application - Electric ...

Optimizing DC drive Bar rolling application Optimizing DC drive Bar rolling application mash98 (Electrical) (OP) 17 Mar 13 00:32. We have a bar rolling mill where a dc motor of following specs is being used while the drive for the same is Mentor II (M1850). General Electric Direct current motor No. 2321820 Type MCF HP 1250 RPM 500/910 Form_____ Volt 600 Amp 1632 Exc Volt 250 Wound ...

Rolling Process: Working, Application, Defects, Type of ...

It is used in slabbing, plumbing, rail, plate roughing work and many other areas. As there is the need for a reversible drive, this mill is cheaper compared to the others. Two High Non-Reversing Mills: In these mills, two rolls continuously revolve in the same direction and we can’t reverse the direction of the rollers. In this operation, the motive power is less costly. 2. Three-High ...

4 High Rolling Mills for sale, New Used

(used) 4 high non reversing rolling mill (13893) machine 13893 type mill: 4 high non reversing work rolls: 10" (250mm) diameter x 20" (500mm) wide back up