Ward Leonard Method Of Speed Control d395o
This document was ed by and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this report form. Report 3i3n4
Overview 26281t
& View Ward Leonard Method Of Speed Control as PDF for free.
More details 6y5l6z
- Words: 816
- Pages: 6
4/28/2016
Ward Leonard Method of Speed Control | Electrical4u
Ward Leonard Method of Speed Control « Previous
Next »
Ward Leonard control system is introduced by Henry Ward Leonard in 1891. Ward Leonard method of speed control is used for controlling the speed of a DC motor. It is a basic armature control method. This control system is consisting of a dc motor M_1 and powered by a DC generator G. In this method the speed of the dc motor (M_1) is controlled by applying variable voltage across its armature. This variable voltage is obtained using a motorgenerator set which consists of a motor M_2(either ac or dc motor) directly coupled with the generator G. It is a very widely used method of speed control of DC motor.
MENU Principle of Ward Leonard Method
Basic connection diagram of the Ward Leonard speed control system is shown in the figure below.
http://www.electrical4u.com/wardleonardmethodofspeedcontrol/
1/6
4/28/2016
Ward Leonard Method of Speed Control | Electrical4u
The speed of motor M1 is to be controlled which is powered by the generator G. The shunt field of the motor M1 is connected across the dc supply lines. Now, generator G is driven by the motor M2. The speed of the motor M2 is constant. When the output voltage of the generator is fed to the motor M1 then the motor starts to rotate. When the output voltage of the generator varies then the speed of the motor also varies. Now controlling the output voltage of the generator the speed of motor can also be controlled. For this purpose of controlling the output voltage, a field regulator is connected across the generator with the dc supply lines to control the field excitation. The direction of rotation of the motor M1 can be reversed by excitation current of the generator and it can be done with the help of the reversing switch R.S. But the motor generator set must run in the same direction.
Advantages of Ward Leonard System
http://www.electrical4u.com/wardleonardmethodofspeedcontrol/
2/6
4/28/2016
Ward Leonard Method of Speed Control | Electrical4u
Advantages of Ward Leonard System 1. It is a very smooth speed control system over a very wide range (from zero to normal speed of the motor).
2. The speed can be controlled in both the direction of rotation of the motor easily.
3. The motor can run with a uniform acceleration.
4. Speed regulation of DC motor in this ward Leonard system is very good.
Disadvantages of Ward Leonard System 1. The system is very costly because two extra machines (motorgenerator set) are required.
2. Overall efficiency of the system is not sufficient especially it is lightly loaded.
Application of Ward Leonard System This Ward Leonard method of speed control system is used where a very wide and very sensitive speed control is of a DC motor in both the direction of rotation is required. This speed control system is mainly used in colliery winders, cranes, electric excavators, mine hoists, elevators, steel rolling mills and paper machines etc.
Objective Questions on DC Motor (MCQs) « Previous
Next »
Closely Related Articles DC Motor or Direct Current Motor Working or Operating Principle of DC Motor Torque Equation of DC Motor http://www.electrical4u.com/wardleonardmethodofspeedcontrol/
3/6
4/28/2016
Ward Leonard Method of Speed Control | Electrical4u
Construction of DC Motor | Yoke Poles Armature Field Winding Commutator Brushes of DC Motor Lap Winding Simplex and Duplex Lap Winding Armature Reaction in DC Machine Commutation in DC Machine or Commutation in DC Generator or Motor Methods of Improving Commutation Starting Methods to limit Starting Current and Torque of DC Motor 3 Point Starter | Working Principle and Construction of Three Point Starter 4 Point Starter | Working Principle and Construction of Four Point Starter Speed Regulation of DC Motor Speed Control of DC Motor Losses in DC Machine Testing of DC Machine Swinburne Test of DC Machine More Related Articles Electrical Motor | Types Classification and History of Motor Working of Electric Motor Types of DC Motor Separately Excited Shunt Series Compound DC Motor Shunt Wound DC Motor | DC Shunt Motor Series Wound DC Motor or DC Series Motor Compound Wound DC Motor or DC Compound Motor Permanent Magnet DC Motor or PMDC Motor | Working Principle Construction Brushless DC Motors New Articles Electronic Ballast Data Transfer in Shift s Buffer and Controlled Buffer Shift s http://www.electrical4u.com/wardleonardmethodofspeedcontrol/
4/6
4/28/2016
Ward Leonard Method of Speed Control | Electrical4u
Radiance and Luminance Radiant Exitance and Luminous Exitance Please provide your valuable comments Name :
Enter your name here
Email :
Enter your email here
Location :
Enter your location here
Your content : Enter your content here
Enter the above code here
Regenerate Code Submit Reset
http://www.electrical4u.com/wardleonardmethodofspeedcontrol/
5/6
4/28/2016
Ward Leonard Method of Speed Control | Electrical4u
© 20112016 electrical4u.The content is copyrighted to electrical4u and may not be reproduced on other websites.
http://www.electrical4u.com/wardleonardmethodofspeedcontrol/
6/6
Ward Leonard Method of Speed Control | Electrical4u
Ward Leonard Method of Speed Control « Previous
Next »
Ward Leonard control system is introduced by Henry Ward Leonard in 1891. Ward Leonard method of speed control is used for controlling the speed of a DC motor. It is a basic armature control method. This control system is consisting of a dc motor M_1 and powered by a DC generator G. In this method the speed of the dc motor (M_1) is controlled by applying variable voltage across its armature. This variable voltage is obtained using a motorgenerator set which consists of a motor M_2(either ac or dc motor) directly coupled with the generator G. It is a very widely used method of speed control of DC motor.
MENU Principle of Ward Leonard Method
Basic connection diagram of the Ward Leonard speed control system is shown in the figure below.
http://www.electrical4u.com/wardleonardmethodofspeedcontrol/
1/6
4/28/2016
Ward Leonard Method of Speed Control | Electrical4u
The speed of motor M1 is to be controlled which is powered by the generator G. The shunt field of the motor M1 is connected across the dc supply lines. Now, generator G is driven by the motor M2. The speed of the motor M2 is constant. When the output voltage of the generator is fed to the motor M1 then the motor starts to rotate. When the output voltage of the generator varies then the speed of the motor also varies. Now controlling the output voltage of the generator the speed of motor can also be controlled. For this purpose of controlling the output voltage, a field regulator is connected across the generator with the dc supply lines to control the field excitation. The direction of rotation of the motor M1 can be reversed by excitation current of the generator and it can be done with the help of the reversing switch R.S. But the motor generator set must run in the same direction.
Advantages of Ward Leonard System
http://www.electrical4u.com/wardleonardmethodofspeedcontrol/
2/6
4/28/2016
Ward Leonard Method of Speed Control | Electrical4u
Advantages of Ward Leonard System 1. It is a very smooth speed control system over a very wide range (from zero to normal speed of the motor).
2. The speed can be controlled in both the direction of rotation of the motor easily.
3. The motor can run with a uniform acceleration.
4. Speed regulation of DC motor in this ward Leonard system is very good.
Disadvantages of Ward Leonard System 1. The system is very costly because two extra machines (motorgenerator set) are required.
2. Overall efficiency of the system is not sufficient especially it is lightly loaded.
Application of Ward Leonard System This Ward Leonard method of speed control system is used where a very wide and very sensitive speed control is of a DC motor in both the direction of rotation is required. This speed control system is mainly used in colliery winders, cranes, electric excavators, mine hoists, elevators, steel rolling mills and paper machines etc.
Objective Questions on DC Motor (MCQs) « Previous
Next »
Closely Related Articles DC Motor or Direct Current Motor Working or Operating Principle of DC Motor Torque Equation of DC Motor http://www.electrical4u.com/wardleonardmethodofspeedcontrol/
3/6
4/28/2016
Ward Leonard Method of Speed Control | Electrical4u
Construction of DC Motor | Yoke Poles Armature Field Winding Commutator Brushes of DC Motor Lap Winding Simplex and Duplex Lap Winding Armature Reaction in DC Machine Commutation in DC Machine or Commutation in DC Generator or Motor Methods of Improving Commutation Starting Methods to limit Starting Current and Torque of DC Motor 3 Point Starter | Working Principle and Construction of Three Point Starter 4 Point Starter | Working Principle and Construction of Four Point Starter Speed Regulation of DC Motor Speed Control of DC Motor Losses in DC Machine Testing of DC Machine Swinburne Test of DC Machine More Related Articles Electrical Motor | Types Classification and History of Motor Working of Electric Motor Types of DC Motor Separately Excited Shunt Series Compound DC Motor Shunt Wound DC Motor | DC Shunt Motor Series Wound DC Motor or DC Series Motor Compound Wound DC Motor or DC Compound Motor Permanent Magnet DC Motor or PMDC Motor | Working Principle Construction Brushless DC Motors New Articles Electronic Ballast Data Transfer in Shift s Buffer and Controlled Buffer Shift s http://www.electrical4u.com/wardleonardmethodofspeedcontrol/
4/6
4/28/2016
Ward Leonard Method of Speed Control | Electrical4u
Radiance and Luminance Radiant Exitance and Luminous Exitance Please provide your valuable comments Name :
Enter your name here
Email :
Enter your email here
Location :
Enter your location here
Your content : Enter your content here
Enter the above code here
Regenerate Code Submit Reset
http://www.electrical4u.com/wardleonardmethodofspeedcontrol/
5/6
4/28/2016
Ward Leonard Method of Speed Control | Electrical4u
© 20112016 electrical4u.The content is copyrighted to electrical4u and may not be reproduced on other websites.
http://www.electrical4u.com/wardleonardmethodofspeedcontrol/
6/6
Related Documents 3h463d
Ward Leonard Method Of Speed Control d395o
December 2021 0
Ward Leonard 5d727
November 2020 0
Ward Leonard 5d727
October 2020 0
Topic 5-ward Leonard System 4i3b4v
November 2019 19
Metodo De Control Ward 6wv6l
June 2021 0
Speed Control Of Bldc Motor 1b1l4x
September 2020 0More Documents from "Sunil Kumar Thakur" xy46
Ward Leonard Method Of Speed Control d395o
December 2021 0
October 2019 53
Hr Policies On Jindal Steel.. 4i4633
December 2019 41
Xendesktop Deployment Blueprint 3w516j
November 2019 36
Evolution Of Data Models 144rj
November 2019 45