The document discusses speed control methods for DC motors. It describes various types of speed control for DC series and shunt motors, including flux control, armature voltage control, potential divider control, and applied voltage control. It also discusses the Ward-Leonard system of speed control, which uses a motor-generator set to provide smooth and rapid variable speed control and is commonly used for elevators and industrial machinery. The document outlines advantages like smooth wide range speed variation but also disadvantages like low efficiency and high initial cost.
Ward Leonard Control, also known as the Ward Leonard Drive System, was a widely used DC motor speed control system introduced by Harry Ward Leonard in 1891. In early 1900s, the control system of Ward Leonard was adopted by the U.S. Navy and also used in passenger lift of large mines.
Speed Control Techniques for Induction Motor - A Reviewijsrd.com
In this paper, various types of speed control methods for the single phase induction motor are described. Speed can be controlled to control the frequency or slip can be controlled to control the torque. Then flux and torque are also function of frequency and voltage. Various methods are used to control the flux and voltage. This paper is focused on sliding mode control technique for induction motor.
Ward Leonard Control, also known as the Ward Leonard Drive System, was a widely used DC motor speed control system introduced by Harry Ward Leonard in 1891. In early 1900s, the control system of Ward Leonard was adopted by the U.S. Navy and also used in passenger lift of large mines.
Speed Control Techniques for Induction Motor - A Reviewijsrd.com
In this paper, various types of speed control methods for the single phase induction motor are described. Speed can be controlled to control the frequency or slip can be controlled to control the torque. Then flux and torque are also function of frequency and voltage. Various methods are used to control the flux and voltage. This paper is focused on sliding mode control technique for induction motor.
Variable Frequency Drive Vs Servo Drive Systemsoftconsystem
The principal primary concern that separates Servo Drives from VFD is the encoder. While Servo Drives can’t work without an encoder for electronic commutation, a VFD can turn out entirely great without it.
In this presentation, basic study of Control of DC motor , study of MATLAB/Simulink, Simulation of entitled project and problem associate with dc motor.
This presentation has been submitted to Mr.Anurag Agrawal and submitted by Munesh Singh, Anitya Shukla, Devendra Kumar and Aditya Vikram Singh in May 2012 to Kanpur institute of Technology,Kanpur India.
Basic Presentation on Speed control of induction motorNileshBambhaniya2
This presentation prepared base on two research paper and electrical machine by NTPL IIT Madrash.
Basic presentation on speed control introduction and method of speed control.
Speed Control of DC Motor under Varying Load Using PID ControllerCSCJournals
DC motors are used extensively in industrial variable speed applications because of most demanding speed-torque characteristics and are simple in controlling aspects. This paper presents a DC motor speed controlling technique under varying load condition. The linear system model of separately excited DC motor with Torque-variation is designed using PID controller. A Matlab simulation of proposed system with no-Load and full-load condition is performed on Simulink platform to observe the system response. The motor speed is kept constant in this experiment. The simulation result of the experiment shows that a motor is running approximately at a constant speed regardless of a motor load. The Simulink results show that the speed of the motor is slow down only for about 270 rpm (9%) in 980 milliseconds under the effect of full load. However, the motor speed is hunting about 200 rpm (6.66%) in 900 milliseconds on unloading condition. It is concluded that a PID controller is successful tool for controlling the motor speed in presence of load disturbances.
Variable Frequency Drive Vs Servo Drive Systemsoftconsystem
The principal primary concern that separates Servo Drives from VFD is the encoder. While Servo Drives can’t work without an encoder for electronic commutation, a VFD can turn out entirely great without it.
In this presentation, basic study of Control of DC motor , study of MATLAB/Simulink, Simulation of entitled project and problem associate with dc motor.
This presentation has been submitted to Mr.Anurag Agrawal and submitted by Munesh Singh, Anitya Shukla, Devendra Kumar and Aditya Vikram Singh in May 2012 to Kanpur institute of Technology,Kanpur India.
Basic Presentation on Speed control of induction motorNileshBambhaniya2
This presentation prepared base on two research paper and electrical machine by NTPL IIT Madrash.
Basic presentation on speed control introduction and method of speed control.
Speed Control of DC Motor under Varying Load Using PID ControllerCSCJournals
DC motors are used extensively in industrial variable speed applications because of most demanding speed-torque characteristics and are simple in controlling aspects. This paper presents a DC motor speed controlling technique under varying load condition. The linear system model of separately excited DC motor with Torque-variation is designed using PID controller. A Matlab simulation of proposed system with no-Load and full-load condition is performed on Simulink platform to observe the system response. The motor speed is kept constant in this experiment. The simulation result of the experiment shows that a motor is running approximately at a constant speed regardless of a motor load. The Simulink results show that the speed of the motor is slow down only for about 270 rpm (9%) in 980 milliseconds under the effect of full load. However, the motor speed is hunting about 200 rpm (6.66%) in 900 milliseconds on unloading condition. It is concluded that a PID controller is successful tool for controlling the motor speed in presence of load disturbances.
Adaptive Variable Structure Controller Application to Induction Motor DriveIJERA Editor
Variable structure control is an adaptive control that gives robust performance of a drive with parameter variation and load torque disturbance. Variable control structure is a robust control scheme based on the concept of changing the structure of the controller in response to the changing state of the system in order to obtain a desired response. The control is nonlinear and can be applied to the linear or nonlinear plant. A high speed switching control action is used to switch between different structures of the controller and the trajectory of the system is forced to move along a chosen switching manifold in the state space. The controller detects the deviation of the actual trajectory from the reference trajectory and corresponding changes the switching strategy to restore the tracking. Prominent characteristics such as invariance, robustness, order reduction, and control chattering are discussed in detail. Methods for coping with chattering are presented. Both linear and nonlinear systems are considered. By using Variable structure controller to control the step change in reference speed and drive system under load torque variations.
Analytical Description of Dc Motor with Determination of Rotor Damping Consta...theijes
DC motor as an electric machine have been applied in numerous control systems. However, a critical parameter of interest that must be evaluated in designing a DC motor based system is the damping constant of the rotor. This paper analytically examines how to determine the damping constant of the rotor of a 12V DC motor, with the determination based on the following parameters: Armature resistance (Ra), inductance (La), Capacitance, the Stall current and the Angular rate of excitation of the motor with varying armature excitation of the current. These parameters help to ascertain the maximum and the minimum operating limit of the motor so as not to exceed the boundary-operating limits of the 12V motor. Experiments were performed in the laboratory and at the end of the analysis, the result shows that the value of damping constant of a 12V DC motor was -3.317 10-4 N-m-sec 2 . This parameter can be factored in future control system designs.
Electrical drives are integral part of industrial and automation processes, particularly where precise control of speed of the motor is the prime requirement. In addition, all modern electric trains or locomotive systems have been powered by electrical drives. Robotics is another major area where adjustable speed drives offer precise speed and position control.
This ppt gives a small introduction to vector speed control of induction motor.
In my uploads another pdf is there which completely explains about vector control method
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
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Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
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Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
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(C) 2024 Robbie E. Sayers
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
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When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
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using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
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Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
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Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
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The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
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Speedcontrolofdcmotor
1. SPEED CONTROL of DC MOTORS
1
Speed control of DC motors kongunadu college of engineering & technology
Content:
Factors affecting the speed control of DC MOTORS.
Different Types of Speed Control Of DC SERIES and SHUNT motors.
Ward-Leonard System of Speed Control.
References
S.RAGUL,
ASSISTANT PROFESSOR,
DEPARTMENT OF EEE,
KNCET
2. Factors affecting the speed of D.C
Motor
Flux
Voltage across the armature
Applied voltage
Depending upon these factors the various methods of speed
control
2
Speed control of DC motors kongunadu college of engineering & technology
3. 3
Speed control of DC motors kongunadu college of engineering & technology
4. Speed Control of DC Shunt Motor
FLUX CONTROL
METHOD
4
Speed control of DC motors kongunadu college of engineering & technology
8. Speed Control of DC Series Motor
Flux Control – Field Divertor Method
Series field winding is shunted by a variable resistance (Rx) known
as field divertor
Speed control above rated value
8
Speed control of DC motors kongunadu college of engineering & technology
9. Motor which require constant load torque
Armature of the motor is shunted by a variable resistance (Rx)
known as armature divertor
Speed control below rated value
9
Speed control of DC motors kongunadu college of engineering & technology
10. Flux change is achieved by changing the number of turns of the field winding
Speed control above rated value
10
Speed control of DC motors kongunadu college of engineering & technology
12. Rheostatic Control
Variable resistance (Rx) is inserted in series with the motor, the
voltage drop across this resistance (IaRx) occurs. This reduces
the voltage across the armature.
12
Speed control of DC motors kongunadu college of engineering & technology
13. Applied Voltage Control
The voltage obtained from the generator is controlled by a field
divertor resistance connected across the series field winding of the
generator
13
Speed control of DC motors kongunadu college of engineering & technology
14. Ward-Leonard System of Speed Control
This system is commonly employed for elevators, hoists and main drive in steel mills
The modifiedWard-Leonard system is called Ward-Leonard – Ilgner system in which a
flywheel is used in addition to motor generator set.
14
Speed control of DC motors kongunadu college of engineering & technology
15. ADVANTAGES AND DISADVANTAGES
Smooth variation of speed over wide range.
Rapid and instant speed reversed.
Speed control above and below rated is possible.
Good speed regulation.
Efficiency is low
Initial cost of setup is very high.
15
Speed control of DC motors kongunadu college of engineering & technology
16. 16
Speed control of DC motors kongunadu college of engineering & technology
Conclusion:
The factors affecting speed control of dc machines, different methods
advantage and disadvantages is explained in detail with suitable
diagrams.
Ward-Leonard System of Speed Control also discussed.
References:
