February 27, 2010

EE 9253 ELECTRICAL MACHINES – I SYLLABUS


ANNA UNIVERSITY CHENNAI :: CHENNAI 600 025 REGULATIONS – 2008
CURRICULUM FROM IV SEMESTERS FOR B.E. ELECTRICAL AND ELECTRONICS ENGINEERING
EE 9253 ELECTRICAL MACHINES – I

AIM:
To study the fundamental principles of Electrical machines and the characteristics of
D.C Machines and Transformers.

OBJECTIVES:
To study the fundamental principles of Electro-mechanical energy conversion
To study the machine windings and the MMF pattern of armature and field windings.
To study the theory, operation and characteristics of DC machines and Transformers.

UNIT I - ELECTRO-MECHANICAL ENERGY CONVERSION 6+2
Flux linkage, inductance and energy – time varying and rotational induced emf's –
losses – conservation of energy – energy and co energy – force and torque – singly
and doubly excited systems – reluctance and mutual torque.

UNIT II – TRANSFORMERS 12+4
Construction – principle of operation – ideal transformer – equivalent circuit – testing
and efficiency – voltage regulation – auto-transformer – three phase connections –
parallel operation of transformers – phase conversion – tap-changing – harmonics –
three-winding transformers – applications.

UNIT III - BASIC CONCEPTS IN ELECTRICAL MACHINES 9+3
Armature windings: D.C Machine – armature winding (lap and wave connection), field
winding – MMF pattern of commutator winding and field winding. A.C Machine
(single-phase and three-phase) – concentrated and distributed windings – single –
layer and double-layer windings – distribution and pitch factors – MMF pattern for
alternating and rotating fields – concept of space phasors – EMF and torque
equations.

UNIT IV - D.C. MACHINES 12+4
Construction – EMF and torque equation of generator – armature reaction –
commutation – methods of excitation – equivalent circuits – characteristics of
generators – parallel operation – EMF and torque equation of motor – principle of
operation – characteristics of motors.

UNIT V - DC MOTORS 6+2
Starting and speed control – testing and efficiency – braking – applications –
Permanent Magnet DC Machines.

Lecture – 45 Tutorial – 15 TOTAL : 60 PERIODS

TEXT BOOKS:
1. Fitzgerald, A.E.Charles Kingsley Jr.Stephen D.Umans, ‘Elecric Machiney’,
McGraw Hill Book Company, Third Edition 2002.
2. Nagrath, I.J. and Kothari.D.P., Electric Machines’, T.M.H. publishing Co. Ltd.,
New Delhi

REFERENCES:
1. Say M.G "Performance and Design of Alternating Machines ' CBS Publishers and
Distributors, New Delhi, First Indian Edition, Reprint 1998.
2. Irving L.Kosow, "Electric Machinery and Transformers", Prentice Hall of India
Private Ltd., New Delhi, Second Edition, Reprint 2007.
3. Stephen J.Chapman, "Electric Machinery Fundamentals', "McGraw Hill Intl.
Edition, New Delhi, 2005.


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