dc drives used in hot rolling mill

Drive selection for rolling mills - Russula

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.

Sprint Electric Industry - Metal Processing Appli ions

Sprint Electric’s high power 4 quadrant DC Drives provide exceptional motor control up to 980kW in rolling mill appli ions. 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.

Characteristics of DC Motors Used in Rolling Mills - Hani Tech

Characteristics of DC Motors Used in Rolling Mills. 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;

WHERE ARE DC DRIVES USED IN INDUSTRY?

Industry Type Power Single quadrant 4 quad regen Field weakening Constant torque Single drive Multi drive Useful information Metal Industries Rolling Mill Up to 1000kW ü ü ü ü Check for shock loads, and if field weakening is required. Strip Mill Up to 100kW ü ü ü ü ü Check if field weakening is required. Slitters and Perforators

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.

Motors for rolling mills Up to 25 MW, 13.8 kV

Motors for rolling mills and other industrial appli ions. Up to 25 MW, 13.8 kV. German manufacturer since 1927. Reference projects worldwide. Read more

AC drives help modernise hot rolling finishing mill

AC drives help modernise hot rolling finishing mill. 15 May 2012. The existing DC main drives of a hot rolling finishing mill at Aperam& 39;s stainless steel plant in Châtelet, Belgium are to be replaced with more powerful AC systems supplied by Siemens, as part of a project of modernisation plans within Aperam& 39;s Leadership Journey to reduce costs and improve profitability.

PDF & 39;Appli ion of AC motors and drives in steel industries

The R0/V0 stand motors of Hot Strip Mill o f ... Till now DC Motors/drives are used for sinter plant processing. Now we are replacing DC motors/drives by TEFC totally enclosed fan cooled AC ...

ABB drives in metals

4 - ABB drives in metals ABB Drives for rolling mills Rolling mill appli ions demand high precision and high overloadability. They are characterized by quickly changing loads, rapid alternation between driving and braking actions, constant torque in a wide speed range and large torque steps. ABB medium voltage drives are the perfect

PDF Advanced Control Techniques for Rolling Mills

The project is concerned with control of strip tension and looper angle in BHP& 39;s hot strip steel rolling mill the finishing mill . The new controllers have been successfully implemented on the ...

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

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

A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS

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 ...

Sprint Electric manufacturers of Industrial Motor Control ...

State-of-the-art Digital and Analogue DC Drives, Digital AC Slip-Ring Drives and Small DC – DC drives. Manufactured in the UK. Large Stocks. Fast Delivery. Use World-Class technology to increase your productivity, save energy and reduce downtime.

Which motor is used in rolling mills? - Quora

Raymond is quite right. However, I’d like to add that often large induction machines are used with variable frequency drives VFDs these days, they have similar speed control, smaller footprint and lower operating costs than machines with slip ri...

Drives Upgrade - Russula

After building the drives or DCRs, technical experts from our workshop can install or supervise the installation at your plant. This reduces considerably the downtime of your rolling mill and expedites the start-up time, since our engineers are experienced and specialized in AC and DC drive configurations and the rolling mill process.

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

Hot Rolling - an overview ScienceDirect Topics

The experimental hot rolling Hille mill, presented in Fig 1, used to carry out multi-pass forward-forward or forward- reverse rolling and also complex multi-pass rollingexperiments, has a three-phase 20hp induction motor for main drive, reduction gears for roll speed adjustment between 2 63 rpm from the fixed motor speed of 1500 rpm andtwo rolls with a diameter of 139 mm. The maximum torque ...

Siemens to supply drives technology for Alunorf& 39;s aluminum ...

The last stand on the finishing mill and the coiler will be fitted with new AC drives. Both measures will increase rolling speed and therefore production capacity. Siemens will be supplying a synchronous motor with a non-salient pole rotor for the last rolling stand, which is currently equipped with a DC motor, and an induction motor for the ...

Rolling Mills: 6 Different Types of Rolling Mills Images and PDF

The types of rolls used in rolling mills are depended upon the shape, size and the gap between the rolls and their contour. Because of workability and limitations in equipment, rolling is done in the following steps, that is a number of passes through the rolls may be required to get the required configuration.

A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS

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 ...

1301 The Rolling of Aluminium: the Process and the Product

the hot rolling mill is coiled for transport to the cold mill which might be on the same site or elsewhere. Cold mills, in a wide range of types and sizes are available; some are single stand, others 3 stand and some 5 stand Figures 1301.02.03 and 1301.02.04 . Cold rolling speeds vary but modern mills operate at exit speeds as high as 3000 m per

DC Drives India

Parker has a long history of DC drives manufacture, with years of experience in installing drives into standalone speed control and sectional drive systems. Our DC Drive products combine optimal control performance and easy maintenance with user-friendly interfaces, standard open fieldbuses, system integration and worldwide product support.

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

dc drives used in hot rolling mill – Grinding Mill China

dc drives used in hot rolling mill 4.7 - 4899 Ratings The Gulin product line, consisting of more than 30 machines, sets the standard for our industry. We plan to help you meet your needs with our equipment, with our distribution and product support sy ...

Cycloconverter - Wikipedia

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 give greater reliability and efficiency. Single-phase bridge CCVs have also been used extensively in

Teco-Westinghouse Motor Company: Products - DC Motors ...

Rolling Mill Motors Used in the steel and aluminum industries, rolling mill motors generally operate at low speeds and are designed for constant torque with a speed range of up to four to one. Some appli ions include continuous cold mills, continuous hot strip mills, and reversing hot mills.

Pinch Roll – Hani Tech - Hani Tech – Rolling Mill ...

Pinch roll DC motor is used to improve drive speed by two-stage cylindrical gear. Up and down roll is installed respectively at two swing arm. There is one air cylinder which drives them up and down roll synchronous close to or leave rolling line by a group of the crank-link mechanism. There is equipped with adjustable limit equipment to adjust pinch roll max opening degree and the minimum ...

Siemens to supply drives technology for Alunorf& 39;s aluminum ...

Siemens Metals Technologies has won an order from German company Aluminium Norf Gmbh Alunorf to supply automation and drives systems to expand and modernize hot rolling mill no. 1 in its Neuss ...

Rolling Process: Working, Appli ion, Defects, Type of ...

This process is vastly used in respect of any other rolling process. In this process, the metal is heated above the recrystallization temperature.In the hot working process, the metal is changing its grain structure because of the heat, now there were a new set of strain-free grains in the metal and this process needs less amount of force which correspondingly reduces the quality of the ...

Which motor is used in rolling mills? - Quora

Raymond is quite right. However, I’d like to add that often large induction machines are used with variable frequency drives VFDs these days, they have similar speed control, smaller footprint and lower operating costs than machines with slip ri...

ABB drives in metals

4 - ABB drives in metals ABB Drives for rolling mills Rolling mill appli ions demand high precision and high overloadability. They are characterized by quickly changing loads, rapid alternation between driving and braking actions, constant torque in a wide speed range and large torque steps. ABB medium voltage drives are the perfect

Primetals Technologies to modernize rolling mill drives for ...

infeeds and third-party DC motors. The conversion and commissioning is scheduled to take place during a brief plant shutdown at the end of 2015. Strip production at AMAG rolling GmbH in Ranshofen, Austria. Primetals Technologies is going to modernize the entire drive technology of the four-high hot rolling stand photo: AMAG rolling GmbH

Steel Industry Systems with Integrated Mechanical and ...

inverter drives are used to control the motors to achieve performance improvements and greater energy efficiency. One example is the 2009 replacement of the 5,000-kW DC motor and drive used in a roughing mill in the hot strip mill at the East Japan Works - Keihin Area of JFE Steel Corporation with an 8,000-kW variable-speed AC induction motor ...

Rolling Process: Working, Appli ion, Defects, Type of ...

This process is vastly used in respect of any other rolling process. In this process, the metal is heated above the recrystallization temperature.In the hot working process, the metal is changing its grain structure because of the heat, now there were a new set of strain-free grains in the metal and this process needs less amount of force which correspondingly reduces the quality of the ...

Drive Technology Drive and Automation Technology Siemens ...

Direct drives also made it possible to use a continuous conveyor belt, thus eliminating the need for transfer stations and reducing downtime, maintenance and costs. The belt system had three individual segments equipped with a total of 5 integrated drive systems. The largest belt used two direct drives at 6,000 kilowatts kW each. The two ...

Mill rolls. Rolls for rolling mills

Work rolls are usually used as drive rolls. In mill stands where ratio of body length to roll Ø ≥ 5:1, and a very thin alloy steel strip is rolled, and in multi-roll machines back-up rolls are used as drive rolls. Rolls with antifriction bearings have stepped necks. Mills where journal bearings are used usually have flat roll necks. Some ...

Manufacturer of Industrial Drives and Industrial Automation ...

Bharat Bijlee offers Variable speed AC drives in partnership with KEB Germany. KEB’s worldwide appli ion specific engineering expertise coupled with our experience in offering customized motors to every segment of industry, gives our customers the assurance of superior world class industrial drives and industrial automation solutions.

Rolling Mills/Z mills

Drives and automation systems for steelmaking, furnaces, casters, hot and cold rolling mills, profile rolling mills, process lines, as well as complete mini mill electrical systems including turnkey supply of electrical powerdistribution systems. Switches, breakers, relays, switchgear, power distribution substations, static VAR and STATCOM systems. Motors, motor control centers, motor starters ...

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