EE0206-TRANSMISSION AND DISTRIBUTION SYSTEMS
COURSE CODE:
EE1004
COURSE TITLE:
ELECTRICAL MACHINES I
PURPOSE
To give the students a fair knowledge on the working of various DC machines &
Transformers.
INSTRUCTIONAL OBJECTIVES
At the end of the course the students will be able to:
1.
2.
To analyze the performance of different types of DC machines & Transformers
To appreciate the applications of DC machines & Transformers.
SYLLABUS
UNIT I – ELECTRO MAGNETIC INDUCTION & BASIC CONCEPTS IN ROTATING MACHINES
Introduction to magnetic circuits – Magnetically induced EMF and force – AC
operation of magnetic circuits –. Energy in magnetic systems – Field energy & mechanical force – Single and
Multiple excited systems. MMF of distributed windings – Magnetic fields in rotating machines – Generated
voltages – Torque.
UNIT II – DC GENERATORS
Constructional features of DC machine – Principle of operation of DC generator – EMF equation – Types of
excitation – No load and load characteristics of DC generators – commutation – armature reaction – Parallel
operation of DC generators.
UNIT III – DC MOTORS
Principle of operation of DC motors-Back EMF – Torque equation –Types of DC motors-Speed – Torque
characteristics of DC motors – Starting of DC motors: 2 point starter, 3 point starter, 4 point starter – Speed
control: Field control, Armature control, voltage control, Thyristor control – Losses and efficiency –
Applications
UNIT IV – TRANSFORMERS
Principle of operation – Constructional features of single phase and three phase transformers – EMF equation –
Transformer on No load and Load –Phasor diagram --equivalent circuit – Regulation - three phase transformer
connections-parallel operation of single phase and three phase transformer- Auto transformers.
UNIT V – TESTING OF DC MACHINES & TRANSFORMERS
Losses and efficiency –Condition for maximum efficiency – Testing of DC machines: Brake test , Swinburne’s
test, Retardation test, Hopkinson’s test- Testing of transformer: polarity test, load test, open circuit and short
circuit test, Sumpner’s test – All day efficiency.
TEXT BOOKS
1. Kothari.D.P and Nagrath.I.J. Electrical Machines, Tata McGraw Hill Publishing Co.Ltd, New Delhi, 5th
edition 2002
2. Bimbhra.P.S, Electrical Machinery,Khanna Publishers, IL Kosow, “Electrical Machines &
Transformers”, Prentice Hall of India. 2nd edition 2003.
REFERENCE BOOKS
1. Dr. Murugesh Kumar.K. “DC Machines & Transformers”, Vikas Publishing House Pvt Ltd.,2nd
edition 2003.
1
EE0206-TRANSMISSION AND DISTRIBUTION SYSTEMS
2.
3.
4.
Fitgerald, A.E., Charles Kingsely Jr. Stephen D.Umans, “Electric Machinery” McGraw Hill Books
Company, 6th edition 2002.
Hill Stephen, Chapman.J, “Electric Machinery Fundamentals”, McGraw Hill Book Co., New Delhi,
4th edition 2005.
Albert E Clayton and Hancock.N.N, “The performance and design of directcurrent Machines”,
Oxford and IBH publishing company Pvt. Ltd., New Delhi,1990.
EE 1004 ELECTRICAL MACHINES – I
Department of Electrical and Electronics Engineering
a
b c d
e
f
g
h
i
j
k
Student outcomes
x
x
x
Mapping of instructional
objectives with student
1,2
1,2
1,2
outcome
Engineering
Basic
Sciences
General
Professional
Sciences
and
(G)
Subjects(P)
Category
(B)
Technical
Arts(E)
x
Electrical
Circuits
Electronics
Power Intelligent
Machines
and
System Systems
Broad area (for ‘P’category)
Systems
----x
Approval
23rd meeting of Academic Council, May 2013
Course designed by
1
2
3
4
5
2
EE0206-TRANSMISSION AND DISTRIBUTION SYSTEMS
Detailed Session Plan
Unit 1
Session
Topics to be covered
No.
1
Introduction
to
magnetic
circuits
Induced EMF & force
2
AC operation of magnetic
circuits
3
Hysteresis & Eddy currents
4
5
6
7
Energy in magnetic systems
Field energy and mechanical
force
Single &Multiple excited
systems
MMF of distributed windings
Magnetic fields in rotating
machines
Generated voltages
Torque
Text book
Page No.
Testing
Methods
11
Kothari.D.P
and
Nagrath.I.J.
Electrical
Machines
34
Instructional
Objective
1.To
analyze
the
performance
of
different types of DC
machines
&
Transformers
36
156
161
Program Outcome
. a).An ability to apply
knowledge
of
mathematics, science, and
engineering.
h) The broad education
necessary to understand
the impact of engineering
in global, economic,
environmental &societal
context
178
225
233
212
188
Unit 2
Session
No.
8
Topics to be covered
Text book
Page No.
Constructional features &
operation of DC machine
B.L.Theraja,
A.K.Theraja,El
ectrical
Technology,Vo
lume II,
AC&DC
Machines
888
9
EMF equation & problems
10
11
Types of Excitation
Testing
Methods
Instructional
Objective
2.To analyze the
performance
of
different types of
DC machines &
Transformers
914
911
Program Outcome
a).An ability to apply
knowledge
of
mathematics,
science,
and engineering.
e).An ability to identify,
formulate, and solve
engineering problems
12
13
No
load
&
Load
characterestics of DC
generators
968
14
Armature reaction
938
15
16
commutation
Parallel operation of DC
generators
946
953
Unit 3
Session No.
18
19
Topics to be covered
Text book
Page No.
Principle of operation of
DC motors-Back emf
Torque
equation-
1.B.LTherajaA.
K.Theraja,Elect
rical
1. 996-998
3
1. 1001
Testing
Methods
Instructional
Objective
1.To analyze the
performance
of
different types of
Program Outcome
a).An ability to apply
knowledge
of
mathematics,
science,
EE0206-TRANSMISSION AND DISTRIBUTION SYSTEMS
20
Problems
21
Types of DC motors
22
Speed
–
Torque
characteristics of DC
motors
Starting of DC motorstypes of starters
23
Technology,Vo
lume II,
AC&DC
Machines
24
DC machines &
Transformers
2. 296
2.J.B.Gupta
Theory &
performance of
electrical
machines
1. 1073
25
Speed control
1. 1033
26
Losses
efficiencyapplications
1. 1022
Unit 4
Session No.
26
27
Topics to be covered
Text book
Page No.
Principle of operation –
Constructional features
of single phase and
three phase transformers
B.LTherajaA.K
.Theraja,Electri
cal
Technology,Vo
lume II,
AC&DC
Machines
1116
1212
28
EMF
problems
equation-
29
30
31
32
33
34
2.To
appreciate
the applications of
DC machines &
Transformers.
2. 312
Testing
Methods
Instructional
Objective
1.To analyze
performance
different types of
machines
Transformers
2. To appreciate
applications of
machines
Transformers.
1122
1129
Transformer on No load
and
Load –Phasor
diagram
equivalent circuit
and engineering.
e).An ability to identify,
formulate, and solve
engineering problems
Program Outcome
the
of
DC
&
the
DC
&
a).An ability to apply
knowledge
of
mathematics,
science,
and engineering.
e).An ability to identify,
formulate, and solve
engineering problems
1132
Regulation - three phase
transformer connections
parallel operation of
single phase and three
phase transformer
Auto transformers
1156
1193
1236
1186
1
Unit 5
Session No.
Topics to be covered
Text book
Page No.
38
Hopkinson’s test
1.
B.LTherajaA.K
.Theraja,Electri
cal
Technology,Vo
lume II,
AC&DC
Machines
1. 1168
37
Losses and efficiency –
Condition for maximum
efficiency
Brake test Retardation
test
Swinburne’s test
39
Testing
transformer:polarity
test,load test,
35
36
4
of
2.Kothari.D.P
and
1. 1092
1. 1105
1. 1094
1. 1099
2. 80
Testing
Methods
Instructional
Objective
1.To analyze
performance
different types of
machines
Transformers
2. To appreciate
applications of
machines
Transformers.
Program Outcome
the
of
DC
&
the
DC
&
a).An ability to apply
knowledge
of
mathematics,
science,
and engineering.
e).An ability to identify,
formulate, and solve
engineering problems
EE0206-TRANSMISSION AND DISTRIBUTION SYSTEMS
40
open circuit and short
circuit test-problems
41
Nagrath.I.J.
Electrical
Machines
1. 1146
1. 1150
42
Sumpner’s test
1. 1167
43
–All day efficiency
1. 1181
5