dc drives used in hot rolling mill

Drive selection for rolling mills - Russula

May 20, 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.

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Sprint Electric Industry - Metal Processing Applications

ROLLING MILL. 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 ...

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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 ...

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DC Motor For Steel Rolling Mills And Wire Rod Mills - DC ...

Our DC Motor is used for Steel Rolling Mills And Wire Rod Mills. Features: Fully laminated yoke construction offering excellent commutation- suitable for 6 pulse thyristor power supply; Skewed Rotor construction, ensuring low noise; Vacuum pressure impregnation for armature winding- ensuring high insulation strength. High dynamic response

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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 ...

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Dc Motors Speed Synchronization For Rolling Mills

selection for rolling mills millennium steel, advanced control solutions for flying shears to improve, dc drives used in hot rolling mill harambeehealthcenter org, applications of dc motor series shunt amp compound motor, which motor is used in rolling mills quora, electrical engineering and projects electrical, what guarantees the highest ...

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DC Motor For Steel Rolling Mills And Wire Rod Mills - DC ...

Our DC Motor is used for Steel Rolling Mills And Wire Rod Mills. Features: Fully laminated yoke construction offering excellent commutation- suitable for 6 pulse thyristor power supply; Skewed Rotor construction, ensuring low noise; Vacuum pressure impregnation for armature winding- ensuring high insulation strength. High dynamic response

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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

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Used 2 High Rolling Mills for Sale Surplus Record

Find new and used 2 High Rolling Mills for sale from suppliers near you. Fenn, Lewis, Canadian General Electric and more. ... 1" x 2" Buhler #EW100, 2 Hi finishing mill, manually adjustable roll, vari-speed drive, built in cabinet w/tooling, #28483. Mohawk Machinery Inc ... reversing hot slab mill, 1966, #6038. USA Machinery Corporation ...

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Used 2 Hi Rolling Mills for sale. Demag equipment more ...

2 HI 1 Stand Rolling Mill. -2 HI Mill: 10.5" W x 9" Dia. Work Rolls Manual Roll Adjustment Forced Water Cooled Rolls Both Rolls Driven Manual Outboard 43" Passline 5" x 7" Mill Housing Pushbutton Controls 20 HP AC Motor. Toledo, OH, USA. Click to Request Price. Top Seller.

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A BASIC UNDERSTANDING OF THE MECHANICS OF

Rolls are tools used in rolling mills to reduce the cross section of metal stock. The weight of rolls may vary from a few kilograms up to 250 tonnes. Under rolling conditions the contact area between roll and stock suffers wear, the other parts of a roll - body and necks - have to be considered as normal parts of designed components under high ...

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4 High Rolling Mills for sale, New Used MachineSales

MACHINE 13308 Manaufacturer United Engineering USA Type Mill 4 High Reversing Rolling Mill Coil thickness (as used) 0.0078" - 0.060" (0.2-1.5 mm) Coil width Max 20" (500 mm) Line speed Max 960 fpm (300MPM) Material Stai

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DC Motors Metal Processing Machinery American Steel

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.

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Electrical Drives In Rolling Mills

Electrics/Automation for Hot Rolling Strip - Metals ... In the field of hot strip rolling, ... and fixed speed drives in all sizes and ratings ensure the optimum drive solution for all hot strip mill ... and electrical ...

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cold rolling mill used machine for sale

Qty. 1 Second-hand double stand cold rolling mill stand Mfc.: SMS/Germany Type: 4-Hi Double Stand Cold Rolling Mill Built: 2009 Stopped: 2017 Capacity: 800,000 Ton/Year Annual running: 6480 h Strip width: 800 – 1650 mm Thickness entry: 1.8~5.0 mm Exit: 0.3 – 2.5 mm Coil OD: 1000~2200 mm Coil ID: 610 mm Coil Weight: Max. 30 T Line Speed: max. 1350 m/min Threading Speed: 30 m/min

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Large PWM Inverters for Rolling Mills

DC drives have been used successfully in rolling mill applications for many years. They have an excellent performance record meeting rolling mill drive requirements including; speed control accuracy, rapid speed control response, fast load recovery, and more. Speed Accuracy Many drives in a rolling mill run in a coordinated fashion using a ...

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Application of AC motors and drives in Steel Industries

III. AC DRIVE FOR ROLLING STAND MOTOR AC synchronous motors are used for driving the roughing stand rolls in a rolling mill. Synchronous motors are used when power requirement is very high and speed of rolling is low. The R0/V0 stand motors of Hot Strip Mill of Rourkela Steel Plant are synchronous motor. These motors are driven by cyclo converter.

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Different types of variable frequency drives

Dc drives normally make use of thyristor and can be used for all applications listed above that are in nonhazardous areas. From a power network perspective dc drives operate at a power factor that decreases with a decrease in motor speed and injects harmonic currents that are roughly proportional to1/n in magnitude where n = 6k±1 ...

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Dc Motors Speed Synchronization For Rolling Mills

continuous quality w3app siemens com, dc drives used in hot rolling mill harambeehealthcenter org, the advantages and disadvantages of dc motor haiyan, synchronisation of dc motors for rolling mills, fuzzy neural control of hot rolling mill iasj, speed control of steel rolling mill

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Dc Motors Speed Synchronization For Rolling Mills

selection for rolling mills millennium steel, advanced control solutions for flying shears to improve, dc drives used in hot rolling mill harambeehealthcenter org, applications of dc motor series shunt amp compound motor, which motor is used in rolling mills quora, electrical engineering and projects electrical, what guarantees the highest ...

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Which one of these motors is used for rolling mills, a DC ...

The starting torque of DC series motor is very high but limitation is it can not operate in no load condition because if it is operate on no load then due to high to it achieve very high speed and due to this it may damage the rotor. The starting ...

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

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 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.

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AIC upgrades DC drives at El Garhy Steel in Egypt ...

Nov 02, 2020  The rolling mill control system and all the drives have already been engineered and manufactured by AIC as the panels in the past. The scope of the supply included: Six new DC drive cabinets suited to drive mill stands; Software development and upgrade of PLC Software. Programming for energy consumptions on working shifts will be implemented in ...

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6RA80 DC DRIVE CONTROLLER - Entries - Forum - Industry ...

Sep 30, 2013  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.

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Rolling Mill - an overview ScienceDirect Topics

2.1 Experimental set up. A Hille-100 rolling mill with rolls of 225 mm diameter and 254 mm length, driven by a variable speed DC motor of 75 horse power, was used. The maximum rolling force, torque and speed are 1500kN, 13kN-m and 70 rpm respectively. The sensor roll

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4 High Rolling Mills for sale, New Used MachineSales

MACHINE 13308 Manaufacturer United Engineering USA Type Mill 4 High Reversing Rolling Mill Coil thickness (as used) 0.0078" - 0.060" (0.2-1.5 mm) Coil width Max 20" (500 mm) Line speed Max 960 fpm (300MPM) Material Stai

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Used Equipment - AIST

A.G. Powell Equipment, Inc. Specializes in the buying and selling of used steel mill equipment on an international basis. The company's primary areas of business are in used rolling mills for both flat and long products, arc melting furnaces, casters, and various pieces of support, finishing, processing and electrical equipment found in a steel mill.

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Used Rolling Mills for sale. Demag equipment more Machinio

1997 SMS Hot Plate Rolling Mill. Manufacturer: Demag This line has the capacity of producing 2,000,000 Tons/Year. Hot Rolling Mill for Steel plates, was constructed in 1997 and has gone through several upgrade. The last major upgrade was done in 2013 at a cost of...

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Primetals Technologies to modernize rolling mill drives ...

Mar 24, 2015  A Sinamics SM150 converter drives the two 3.3 kV rolling motors, each of which has a power of 3,300 kW and a speed ranging from 240 to 600 rpm. Sinamics S120 converters drive the 690 V coiler motors, each of which has a power of 950 kW and a speed ranging from 330 to 1,200 rpm, as well as the driver motors and trimming shear.

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Different types of variable frequency drives

Dc drives normally make use of thyristor and can be used for all applications listed above that are in nonhazardous areas. From a power network perspective dc drives operate at a power factor that decreases with a decrease in motor speed and injects harmonic currents that are roughly proportional to1/n in magnitude where n = 6k±1 ...

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H∞ Speed Controller Design for Hot Rolling Mill Drives ...

Jul 01, 1997  An H ∞ speed controller design method for hot rolling mill drives, #4 drive system in #2 hot rolling mill of POSCO, is proposed. A weighted mixed sensitivity minimization method is used for obtaining an H ∞ speed controller, and loop shaping is used for improving speed tracking performance. The designed speed controller guarantees the robust stability of closed loop system against ...

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Applications of Electric Drives Electrical Engineering

In dc drives, the speed of the paper making machine is controlled by varying the armature voltage of a separately excited dc motor. ... which are later drawn into wire), hot-strip mills (the mills used for rolling strips from slabs), cold-strip mills (the mills used for cold-rolling strips previously rolled on hot-strip mills to obtain sheets ...

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