UkaTarsadia University
B. Tech
Electrical Machines – 1
(030060306)
3rdSemester
UkaTarsadia University
A. Prerequisite:
B. Aim and Objective:
Should have knowledge about AC-DC supply systems and laws based
on it.
As electrical machines are the base of electrical engineering, the
objective of the subject is to learn the basic concepts and in detail,
constructional & operational aspects of various electrical machines
used in industries and in day to day life and to impart the practical
knowledge of the various machines for better know how and their
applications.
C. Subject Code:(030060306)
Subject:Electrical Machines-I
D. Total:
[Lecture: 4
90 Hrs.
Tutorial: 0
Practical: 2]
E. Detailed Syllabus:
Sr. No.
1.
1.1
1.2
1.3
1.4
2.
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
Topic Name
Weightage (%)
Principles of Electro-mechanical Energy Conversion
Basic magnetic circuit analysis
Faradays law of electromagnetic induction
Singly and doubly excited magnetic field systems
Torque production in rotating machines
D.C. Generator
Principle of D.C. generator, construction
Commutation and Armature Reaction,
Types of generators
E.M.F. equation, voltage build up process
Critical resistance and speed
Characteristics of generators
Performance equation and efficiency
No Load & load characteristics
Performance of shunt, series and compound Generators
Total losses in DC Generator
10
DC Motor
20
Principal, Type of motors
Torque equation & characteristics
Losses and efficiency
Starters: Necessity of starter, Three point & four point starters.
Introduction to soft starter
Torque-speed characteristics of shunt, series & compound
Motors Speed control
Basic concept of Static speed control of DC machines
20
UkaTarsadia University
3.9
3.10
4
Ward Leonard method
Losses & efficiency in d.c. motor, Power stages
Testing of DC Machines
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
5
Brake Test
Swinburne’s Test, Advantages and disadvantages
Swinburne’s Test
Regenerative or Hopkinson’s test
Alternative connections for Hopkinson’s Test
Merits of Hopkinson’s Test
Retardation or Running Down Test
Field’s Test for series Motor
Single Phase Transformer
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
6
Construction and principle of single-phase transformer
Operation at no load and on load
Vector diagram and equivalent circuit
Losses, efficiency and regulation
Determination of regulation and efficiency by direct load test
and Indirect test methods
Parallel operation
Auto transformer
Condition for maximum efficiency, All day efficiency
Three-Phase Transformer
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
Polarity, Star/star, Star/delta, Delta/delta, delta/zigzag
Terminal marking, Nomenclature
Vector diagram, Phase groups
Parallel operation
Scott connection, V-V connections tertiary winding
Testing of transformers, Sumpner’s test
Efficiency, transients in transformers
Voltage regulation
Off load and on load tap changers
Instrument Transformer - Current Transformer and Potential
Transformer
Rectifier transformer & High frequency transformer
6.11
10
of
20
20
E. Modes of Transaction (i.e. Delivery)
1. Various methods of teaching could beemployed depending on the objectives of the
content taught.
2. Teaching activities can be carried out using conventional (chalk & board) method and/or
with advance multimedia equipment’s.
3. Theory and practical may be explained with some basic simulation tools.
UkaTarsadia University
4. Separate session should be conducted to explain the concept of subject practically.
G. Teachers Activities/Practicum
The following activities should be carried out by the teachers.
1. Carry out Mid-semester examination & remedial examination (if necessary).
2. Continuous evaluation may be carried out to evaluate the performance of student by
mean of arranging Quiz/viva/sessional examination.
3. Laboratory sessions are used to show the practical applications of the subject.
4. Minimum three assignments should be given to students which cover all important topic
of the subject.
H. Student Activities/Practicum
The following activities may be carried out by the students.
1. Remain present in all theory and practical sessions conducted by faculties.
2. Complete assignments and other term work time to time given by faculty.
3. Prepare a book to keep a record of practical sessions conducted by faculties and
complete the laboratory manual in time.
I. Text Books
1. Theory and performance of electrical machines by J.B.Gupta, S.K.Kataria and sons
2. Electric Machinery Fundamentals by Stephen J. Chapman, Mcgraw Hill
3. A textbook of electrical technology VOL II ( AC& DC machines) by
B.L.Theraja&A.K.Theraja S. Chand Publication
J. Reference Books
1. The performance and design of alternating current machines by M.G.Say, CBS Publishers
& Distributors
2. Electrical Machines by D.P. Kothari & I. J. Nagrath
3. Electric Machinery 6th Edition by A.E.Fitzerald, Charles Kingsley, Stephen. D. Umans Tata
Mcgraw Hill
4. Electrical Machinery by Dr. P.S.Bimbhra, Khanna Publisher
K. Reference links/ e-resources/ Other literature
1. http://nptel.iitm.ac.in/courses/IIT-MADRAS/Electrical_Machines_I
2. www.elk.itu.edu.tr/~ozdemir/DC-notes
3. http://www.ece.ualberta.ca/~knight/ee332/ee332.html