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These mills have two horizontally mounted rolls. The rolling mill motor drives either both rolls (top and bottom) or only one roll (normally the bottom roll with the top roll rotating due to the friction between the roll and the rolling stock). ... Mill electric system – It consists of transformers and switch gears, DC (direct current) and AC ...
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Abstract Cold rolling mills, like most metallurgical electrically driven installations, are characterized by low-speed operating modes that involve shock loads. The use of synchronous reluctance machines integrated into controlled electric drives enhances the productivity of the mill, the quality of products, and the energy …
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Motors for Metal Rolling Mills. 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 …
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[1] Radionov A A, Karandaev A S, Khramshin V R, Andryushin I Yu and Gostev A N 2014 Speed and Load Modes of Rolling Hollow Billet at the Wide-Strip Rolling Mill Proc of 2014 Int Conf on Mechanical Engineering, Automation and Control Systems (MEACS) 5 Crossref; Google Scholar [2] Khramshin V R, Evdokimov A S, Kornilov G P, …
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Get right to work with creating textures and flat stock with this compact and easy to use electric rolling mill manufactured in USA by Pepetools. Featuring a 100:1 reduction gear-box, powered by a 1/2 hp motor - the …
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The application of electric power in the steel industry introduced many radical changes and improvements in rolling-mill layout and practise. The electric drives, of capacities …
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The design stages of main electric drives of cold rolling mills regarding selection of power electric equipment and synthesis of automation systems are well known. However, when specialists start to make adjustments, they face numerous subjective and objective issues: unavailability of reliable parameters of power equipment, adjustment …
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AC regenerative electric drives (AC REDs) are widely used in metallurgical rolling due to their reliability, efficiency, and power sufficient to maintain the process.
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V.R. Khramshin, Ways to Compensate for Static Deviations in Speed in Electric Drives of Broad Strip Hot Rolling Mill Stand, Russian Electrical Engineering. 84 (2013) 221â€"227. DOI: 10.3103/S1068371213040032. [11]
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Components of power losses in electric drives of reciprocating rolling mills with an extremely irregular load diagram are considered. Energy efficiency is increased in the electric drive of reciprocating rolling blocks by improving electric drive components, methods, and control systems. It is confirmed that there is a high level of …
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A large variation in the speed of the mill drive is required. Motors for Mill Drive. Dc motors are very versatile as motors for mill drives due to their characteristics of high starting torque, capability for wide range of speed control, precise speed setting, large overload capacity and pull-out torque.
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Electrical Drives Questions and Answers PDF 1. The basic elements of an electric drive are : (a) electric motor and the transmission system. ... The range of rating of electric motor used for rolling mills is of the order of (a) 10 to 25 kW (b) 25 to 85 kW (c) 85 to 400 kW (d) 400 to 1,000 kW Answer: (c) 85 to 400 kW
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A computer model has been developed for the control of frequency-controlled drives within a rolling mill; the model takes account of the drives' elastic interaction. The model permits adjustment of the speed-correction system for the rolling cells in the mill so as to neutralize the elastic-interaction torques. Such correction is …
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Fully integrated electrical and automation solutions for upgrading your plant to higher productivity, quality and availability. More than 100 years of process know-how in hot rolling mills results in better accessibility and higher productivity for your mill.
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AC regenerative electric drives (AC REDs) are widely used in metallurgical rolling due to their reliability, efficiency, and power sufficient to maintain the process. This paper reviews the latest …
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10. Electric Drives Multiple Choice Questions on Introduction to Solid-State Switching Circuits. The section contains Electric Drive multiple choice questions and answers on single phase, half-wave, ac/dc conversion for resistive loads and inductive loads without freewheeling diode, three phase, full-wave, ac/dc conversions, conversions like dc/dc …
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Latin American Applied Research 39:353-359(2009) STRIP THICKNESS ESTIMATION IN ROLLING MILLS FROM ELECTRICAL VARIABLES IN AC DRIVES N.S. MARCELLOS†, J.F. DENTI‡ and G.C.D. SOUSA‡ † Prof. Eletrotécnica, CEFETES, ES, Brasil;. [email protected], ‡ Prof. Depto Eng. Elétrica, UFES, ES, Brasil; [email protected], …
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Toshiba Mitsubishi Electric Industrial Systems Corporation Drive Systems Department 1 Toshiba-cho, Fuchu-shi Tokyo 183-8511, Japan Tel: 81-423-333-2262 ... Many drives in a rolling mill run in a coordinated fashion using a reference from a PLC or earlier analog forms of master control.
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Cold pipe-rolling mills are designed to manufacture high-quality special-purpose tubes for aerospace and power generation industries. Strict requirements for the dynamics, overload capacity, and controllability are imposed on the electric drives of such mills.Direct current motors and synchronous machines with an active rotor are used as …
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Downloadable! AC regenerative electric drives (AC REDs) are widely used in metallurgical rolling due to their reliability, efficiency, and power sufficient to maintain the process. This paper reviews the latest achievements in building the grid connection circuits for the main AC REDs of rolling mills. The paper discusses multipulse connection circuits formed by …
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Thyristor electric drives of the rolling mills are known to be the most power-intensive consumers at the iron and steel works. Obviously, significant losses of electric power are connected with consumption of reactive power that depends on the value of the reserve of rectified EDV of the thyristor converter. The paper mentions characteristic ...
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Thyristor electric drives of the rolling mills are known to be the most power-intensive consumers at the iron and steel works. Obviously, significant losses of electric power are connected with ...
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Radionov A A, Andrjushin I Yu, Galkin V V and Gostev A N 2011 Minimum speed limit of 2000 mill electric drives during tube shell rolling Bulletin of Nosov MSTU 3 pp 20-2 Distribution of contact ...
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The chapters are picked from the book called "A First Course on Electrical Drives By S.K. Pillai and other resources".All the questions in the books are compiled in content and written separately …
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Electric motors and drives are commonly used in rolling mills. AC drives with synchronous or induction motors are suitable for medium to large power applications in rolling mills. Synchronous motors can provide excellent torque for applications like hot strip mills. Induction motors are robust and flexible, especially for low speed rolling.
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It is crucial to limit the force link between the vertical and horizontal stands of a plate rolling mill implemented through the metal workpiece. Such rolling mills are often used for the formation of conical profiles at the ends of workpieces by moving the rollers during the rolling process. This results in the changing of instantaneous metal volumes at the …
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Proven AC drive solution for each type of rolling mill application, ranging from large torque, slow-speed roughing mills to the high-speed, wide tension range aluminum foil …
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Each rolling stand consists of a top and a bottom roll, driven through a gearbox by an electric motor. The rolls of the stands have contours or "grooves" machined into the rolls, so that the hot billet …
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DOI: 10.1109/SIBCON.2015.7147264 Corpus ID: 5631026; System for speed mode control of the electric drives of the continuous train of the hot-rolling mill @article{Khramshin2015SystemFS, title={System for speed mode control of the electric drives of the continuous train of the hot-rolling mill}, author={Vadim R. Khramshin and …
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Power Circuits of the Main Electric Drives of Rolling Mills. This section will firstly consider six-pulse circuits shown in Figure 3 and used for the. main electric drives of the bar and the 1700 ...
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