#### torque speed characteristics of rolling mills

torque speed of vertical roller mills bovenindewolken. torque speed of vertical roller mills TECHNICAL NOTES 8 GRINDING R P King Mineral Technologies,- torque speed of vertical roller mills,induced primarily by impact or as rolling with breakage induced primarily by, Where Mc is the total mass of the charge in the mill and Tf is the torque required to overcome

#### Q: Rolling mills exhibit what type of load torque

Question: Rolling mills exhibit what type of load torque characteristics? Options. A : Constant torque characteristics. B : Linearly rising torque characteristics. C : Non-Linearly rising torque characteristics. D : Non-Linearly decreasing torque characteristics

#### How to Obtain Rolling Torque? Metals Metallurgy

The value of λ has been calculated by Sim by calculating torque by Eqn. (7.71b) for a large range of rolling conditions. For hot rolling λ varies between 0.49 to 0.45. Lower values are for higher reductions. For cold rolling, the value of λ varies from 0.36 to 0.45.

#### Load types and characteristics MB Drive Services

Aug 10, 2020· Torque-Speed characteristic The torque-speed characteristic describes the load torque as function of rotational speed. The load profiles are typically classified in following groups: quadratic torque (square torque, variable torque) linear torque constant torque inverse torque combination of above torque characteristics

#### Large AC Adjustable Speed Motors for Metals Rolling

technology for rolling mill applications. As a result, TMEIC provides customers with an unparalleled choice of technology, including: 1. 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 mills. 2.

#### UNIT 1 CHARACTERISTICS OF ELECTRICAL DRIVES

Constant Torque Characteristic: The speed torque characteristic of this type of load is given by T=K. Working motor have each mechanical nature of work like shaping,cutting, grinding or sharing, require constant torque irrespective of speed. Similarly cranes during the hoisting.

#### Algorithms and Control Systems for Electric Drives of Cold

Oct 02, 2020· Up to12%cash back· 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

#### Torque Speed Characteristics of Induction Motor

FIGURE 1 Induction motor torque-speed characteristic curves.. Figure 2 showed the equivalent circuit for the stator. We can simplify our calculations by replacing it with a Thevenin’s equivalent so that we do not have parallel branches in the equivalent circuit. Figure 3 shows a Thevenin’s equivalent of the stator.

#### 100 Most Important MCQ on Electric Drive 2021- Industrial

As such slip motors are used for small re-rolling mills where wide speed range is not required. Besides wastage of energy taking place in the rotor, the introduction of resistance in rotor circuit converts the speed-torque characteristic of the induction motor from shunt to series.

#### Large AC Adjustable Speed Motors for Metals Rolling Mills

technology for rolling mill applications. As a result, TMEIC provides customers with an unparalleled choice of technology, including: 1. 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 mills. 2.

#### Which of the following motor is used for rolling mills Mcq

Which motor is used in rolling mill? 1. DC Series Motor. Since it has high starting torque and variable speed, it is used for heavy duty applications such as electric locomotives, steel rolling mills, hoists, lifts and cranes. Which of the following motors is used for rolling mills? Slip-ring induction motor.

#### US4566299A Control method and apparatus for rolling mill

The rolling torque calculating section 101 may be arranged to calculate the total torque according to the known rolling theory in the equal peripheral speed rolling operation on the basis of the rolling conditions such as characteristics of rolling mill, the entry and exit thickness of the rolled material, the rolling load, and the hardness of

#### Calculation Of Motor Power On Rolling Mill

torque and power in a rolling mill is based on calculation of roll force of deforming steel is in many cases largely determined by the roll pass design motor rpm revolutions per minute run out speed production rate, rolling of metals rolling reducing

#### DRIVE MOTOR CHARACTERISTICS Tamilnadu

This method is commonly used for Printing presses, elevators, rolling mills and machine tools. Fig Plugging condition and Speed torque characteristics Plugging is executed at a time when the motor is operating at the point E characteristics A for a load torque T L.

#### Characteristic of torsional vibration of mill main drive

Dec 31, 2015· ZHANG Yifang, born in 1980, is currently a lecturer at School of Mechanical Engineering, Anhui University of Technology, Maanshan, China.His research interest is electromechanical coupling vibration of rolling mill. YAN Xiaoqiang, born in 1961, is currently an professor at Institute of Mechanical Engineering, University of Science and Technology

#### Choosing the right speed reduction gearbox Suppliers in

Mar 29, 2018· Torque: It is a moving force expressed in units of a kilo per metre, Newton per metre or pound per feet.Once force is combined with associate execution time, it turns into a “power”. Electric motor: An electric motor features a specific force per HP, associate degreed has an operational speed for the output shaft. Each characteristic, power and speed, outline the

#### Electric Drives MCQ’s Dynamics Types of Loads

Explanation: Rolling mills are an example of non-linearly decreasing torque characteristics because torque and speed exhibits inversely proportional relationships and power are constant. 3 Question. What is the relationship between torque and speed in constant type loads? a) Torque is independent of speed

#### 250+ TOP MCQs on Dynamics Types of Loads and Answers

D. Non-Linearly decreasing torque characteristics Answer: D Clarification: Rolling mills are an example of non-linearly decreasing torque characteristics because torque and speed exhibits inversely proportional relationships and power are constant. 3. What is the relationship between torque and speed in constant type loads? A. Torque is

#### Electrical Drives and Traction VSSUT

h)Draw the speed-torque characteristics of a three phase induction motor in its 4-quadrant region. i)Why regenerative braking is not preferred for dc series motor ? j)Plot the torque-speed characteristics of dc shunt motor during dynamic braking. . 2.a) Derive the formula for overloading factor, when a motor is subjected to i) short time duty

#### Electrical Drives BrainKart

Nature of speed torque characteristics, speed regulation, speed range, efficiency, duty cycle, quadrants of operation, speed fluctuations if any, ratings etc . ü Transient operation requirements: Values of acceleration and deceleration, starting, braking and reversing performance. ü Requirements related to the source:

#### Performance enhanced cardan shaft drives for cold rolling

Series, which is optimized for the particularly high torque requirements in cold rolling mills. Reliable torque transmission from input to output at the highest torque capacity is the most important characteristics of Voith cardan shafts. However the drive configurations of cold rolling mill stands vary, ranging from reversing single stands on

#### ELECTRICAL ENGINEERING IMPORTANT MCQ-INDUSTRIAL DRIVERS

Oct 28, 2016· 18. The starting torque in case of centrifugal pumps is generally (a) less than running torque (b) same as running torque (c) slightly more than running torque (d) double the running torque Ans: a. 19. Which of the following motors are best for the rolling mills ? (a) Single phase motors (b) Squirrel cage induction motors

#### Electric drives and motors MCQ Part-2

Dec 02, 2020· Excellent torque and speed operating characteristics. c. Flexible speed control. d. None of the above. 13. An electric train employing a dc series motor is running at a fixed speed, when a sudden slight drop in the mains voltage occurs. This would result in_____. a. Drop in speed with current unaltered. b. Rise in speed and rise in current. c

#### Torque In Rolling Mills Calculation Formula With Example

Torque Speed Characteristics Of Rolling Mills. Torque speed characteristics of rolling mills torque–speed characteristics electric equipment speed is defined as how fast the motor performs its work for example a service online torque speed of vertical roller mills rolling mill speed calculation formula pdf calculating roll force and torque.

#### Which of the following motor is used for rolling mills Mcq

Which motor is used in rolling mill? 1. DC Series Motor. Since it has high starting torque and variable speed, it is used for heavy duty applications such as electric locomotives, steel rolling mills, hoists, lifts and cranes. Which of the following motors is used for rolling mills? Slip-ring induction motor.

#### US4566299A Control method and apparatus for rolling mill

The rolling torque calculating section 101 may be arranged to calculate the total torque according to the known rolling theory in the equal peripheral speed rolling operation on the basis of the rolling conditions such as characteristics of rolling mill, the entry and exit thickness of the rolled material, the rolling load, and the hardness of

#### DRIVE MOTOR CHARACTERISTICS Tamilnadu

This method is commonly used for Printing presses, elevators, rolling mills and machine tools. Fig Plugging condition and Speed torque characteristics Plugging is executed at a time when the motor is operating at the point E characteristics A for a load torque T L.

#### Calculation Of Motor Power On Rolling Mill

torque and power in a rolling mill is based on calculation of roll force of deforming steel is in many cases largely determined by the roll pass design motor rpm revolutions per minute run out speed production rate, rolling of metals rolling reducing

#### Performance enhanced cardan shaft drives for cold rolling

Series, which is optimized for the particularly high torque requirements in cold rolling mills. Reliable torque transmission from input to output at the highest torque capacity is the most important characteristics of Voith cardan shafts. However the drive configurations of cold rolling mill stands vary, ranging from reversing single stands on

#### MODULE 1 Electrical Drives Electrical Drives

transportation systems, rolling mills, paper machines, textile mills, machine tools, fans, pumps, robots, washing machines etc. machine is the matching of speed-torque characteristics of the given drive unit and that of the motor.

#### ARTIFICIAL NEURAL NETWORK SIMULATION OF PRIME

THE THREE HIGH ROLLING MILLS A M Bisen1*, P M Bapat2, S K Ganguly3 and P S Agrawal4 speed-torque characteristics of Induction motor can be obtained. APPLYING ANN TO AN INDUCTION MOTOR The input of slip v/s torque relationship data as shown in Figure 1 is fed into the ANN software. When ANN is applied to the whole

#### Choosing the right speed reduction gearbox Suppliers in

Mar 29, 2018· Torque: It is a moving force expressed in units of a kilo per metre, Newton per metre or pound per feet.Once force is combined with associate execution time, it turns into a “power”. Electric motor: An electric motor features a specific force per HP, associate degreed has an operational speed for the output shaft. Each characteristic, power and speed, outline the

#### ELECTRICAL ENGINEERING IMPORTANT MCQ-INDUSTRIAL DRIVERS

Oct 28, 2016· 18. The starting torque in case of centrifugal pumps is generally (a) less than running torque (b) same as running torque (c) slightly more than running torque (d) double the running torque Ans: a. 19. Which of the following motors are best for the rolling mills ? (a) Single phase motors (b) Squirrel cage induction motors

#### Electrical Drives

Torque independent of speed. The characteristics of this type of mechanical load are represented by setting k is equal to zero and C equals to 1.While torque is independent of speed. Such examples are hoists,the pumping of water etc. 2. Torque linearly dependent on speed. The torque is linearly proportional to speed k=1,and the

#### Handbook of Electric Machines Infineon Technologies

Dec 03, 2019· Figure 6: Torque-vs.-speed diagram of the IM (5) There are only limited control possibilities for grid-connected induction motors. The slip-ring rotor allows the connection of external resistors to the rotor circuit. The dependence of torque-speed characteristics on rotor resistance is shown in Figure 7.

#### For steel wire rod rolling mills, we want to replace an AC

Answer (1 of 4): Quite honestly, with modern technology, I can see no advantages to DC, only disadvantages. In earlier times the only practical way to get easily controlled variable speed was with DC. With modern electronics, that is no longer

#### Shunt Motors slideum

– T characteristics. Speed- torque characteristics of DC motors. Example 11. Q. A DC machine (12 kW, 100 V, 1000 rpm) is connected to a 100 V DC supply and is operated as a DC shunt motor. At no-load condition, the motor runs at 1000 rpm and the armature current takes 6 A. Given armature resistance R a = 0.1,shunt field winding resistance R