Rolling is the most important metal forming process. More than 95% of ferrous and nonferrous metals and alloys are processed to their usable shapes by rolling. Usable shapes of rolled metals are plate, sheet, strip, foil, different sections like rail, beam, channel, angle, bar, rod, and seamless pipe, etc., as shown in Fig. and Fig.
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WhatsApp: +86 18838072829AC 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 various transformer types and algorithms for ...
WhatsApp: +86 18838072829Electrical Drives Questions and Answers 11. Which of the following motors are best for the rolling mills ? (a) Single phase motors (b) Squirrel cage induction motors (c) Slip ring induction motors (d) motors
WhatsApp: +86 18838072829The system which is used for controlling the motion of an electrical machine, such type of system is called an electrical drive. The main parts of the electrical drives are power modulator, motor, controlling unit and sensing units ... rolling mills, paper machines, textile mills, machine tools, fans, pumps, robots and washing, etc. Related terms:
WhatsApp: +86 18838072829The developed dynamic model of a continuous rolling mill with fourroll passes as control object taking into account electric drive interconnection by means of rolled metal has been implemented in the form of the SIMULINK visual programming software modules of the software package MATLAB . Here the authors do not provide a detailed ...
WhatsApp: +86 18838072829Control of a twomass system was originally stated as a problem for electric drives of rolling mills [4,5,6]. However, the problem is far from being solved. For instance, as plate rolling technology progressed, there emerged problems pertaining to the understudied nature of oscillatory processes in the twomass systems of main lines of stands ...
WhatsApp: +86 18838072829Cold piperolling mills are designed to manufacture highquality specialpurpose tubes for aerospace and power generation industries. Strict requirements for the dynamics, overload capacity, and controllability are imposed on the electric drives of such current motors and synchronous machines with an active rotor are used as electric machines in such mills.
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WhatsApp: +86 18838072829An electrical drives is an electromechanical system that is employed to control motion by controlling electrical energy supplied during works. ... rolling mills, textile mills, fans, paper machines, pumps, and machine tools, etc. requires motion control. So, for this purpose, there needs to be a system to operate all the controls. ...
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WhatsApp: +86 18838072829AC 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.
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WhatsApp: +86 18838072829Applications − Threephase synchronous motors are used for electric drives where continuous constant speed is required such as −. Air compressors. Motorgenerator sets. In the electric drives used in paper and cement industries. Continuous rolling mills. Singlephase Synchronous Motor. Singlephase synchronous motor has constant speed.
WhatsApp: +86 18838072829Each 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 passing between the grooves is reduced in size and shaped by each subsequent stand.
WhatsApp: +86 18838072829Keywords: electric drive, rolling mill, tension control, simulation, stand force interaction, size alignment. 1. Introduction On the modern bar and wire mills interstand tension is controlled at rolling [1, 2]. For a variety of reasons, it is impossible to use tension direct control systems that is why tension value is inferred by the rolling ...
WhatsApp: +86 18838072829The electrical drives that used in rolling system are a set of threephase induction motors (IM) controlled by indirect fieldoriented control (IFO). The fundamental goal of this type of control ...
WhatsApp: +86 18838072829Drives in steel and rolling mills are exposed to extremely hard demands. Glowing steel, alternating operational modes and overloads spell out a high level of electrical and mechanical strain that calls for very sturdy designs. As a traditional supplier to heavy industry, VEM has developed over decades into a specialist for rolling mill drives.
WhatsApp: +86 18838072829Subramaniyaswamy, in Electric Motor Drives and their Applications with Simulation Practices, 2022. Rolling mills. ... Generally, rolling mills are graded according to the content they produce. Direct drive is chosen if the mill's speed allows. In general, direct drive (directconnected motor) is not desirable for speeds less than 150 ...
WhatsApp: +86 18838072829Electrical drive, controls and instrumentation plays a very important role in modern rolling mills. A brief section has been devoted to these but their design aspects are beyond the scope of the present treatise. Mill Stand Components and Mechanisms. Most type of rolling mill stands have certain common basic components, mechanisms and systems.
WhatsApp: +86 18838072829Abstract. The selection of low voltage variable speed motor drives for long product rolling mills is discussed. The motor drives are controlled by a sophisticated cascade, tension or loop control ...
WhatsApp: +86 18838072829TMEIC2 installed its first AC adjustablespeed 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, constituting more than 2,400 MW of installed main drive power. 2.
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WhatsApp: +86 18838072829Analysis of loading modes of rolling mill electrical drives is a time consuming task associated with numerous mathematical calculations. Specialized software significantly facilitates calculations. To implement computerized analysis of operation modes of engines of stand main electrical drives we need to develop new methods and software. 2.
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WhatsApp: +86 18838072829AC 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...
WhatsApp: +86 18838072829Grid Connection Circuits for Powerful Regenerative Electric Drives of Rolling Stands. December 2022. / (57)4253.
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