**E**

**I**

**22**

**0**

**1 ELECTRICAL MACHINES (Common to EIE & ICE)**

**A**

**I**

**M**

To impart basic knowledge on Electrical machines, principles and its behavior.

**O**

**B**

**JE**

**C**

**T**

**I**

**V**

**E**

**S**

At the end of this course, student would have been exposed to:

· Theory of structures, operating principle, characteristics, and applications of D.C and A.C

rotating machines and transformers in detail.

· Introductory knowledge on Special
Machines.

**UN**

**I**

**T I D.C. MACHINES 12**

Construction of D.C. Machines -
Principle and theory of operation of D.C. generator - EMF equation

- Characteristics of D.C. generators -
Armature reaction – Commutation - Principle of operation of
D.C. motor - Voltage equation - Torque equation - Types
of D.C. motors and their characteristics – Starters - Speed control of D.C. motors - Applications.

**UN**

**I**

**T II TRANSFORMERS 9**

Principle -
Theory of ideal transformer -
EMF equation -
Construction details of shell and core type
transformers - Tests on transformers - Equivalent circuit - Phasor diagram -
Regulation and
efficiency of a transformer - Introduction to three - phase transformer connections.

**UN**

**I**

**T III SYNCHRONOUS MACHINES 8**

Principle
of
alternators:- Construction details, Equation of induced EMF and Vector diagram -
Synchronous motor:-
Starting methods, Torque, V curves, Speed control and Hunting.

**UN**

**I**

**T IV INDUCTION MACHINES 9**

Induction motor:-
Construction and principle of operation, Classification of induction motor, Torque
equation, Condition for maximum torque, Equivalent Circuit, Starting methods and Speed control of
induction motors.

**UN**

**I**

**T V SPECIAL MACHINES 7**

Types of single phase motor –Double revolving field theory – Cross field theory – Capacitor start capacitor run motors – Shaded pole motor – Repulsion type motor – Universal motor – Hysteresis
motor - Permanent magnet synchronous motor – Switched reluctance motor – Brushless D.C motor.

**T**

**EX**

**T BOOKS:**

**L = 45 TOTAL: 45 PERIODS**

1. Nagrath, I.J., and Kothari, D.P., “ Electrical Machines”, Tata McGraw - Hill, 1997.

2. Fitzgerald A.E, Kingsley C., Umans, S. and Umans S.D., “Electric Machinery”,
McGraw- Hill, Singapore, 2000.

**R**

**E**

**FERENCES:**

1. Theraja, B.L., “A Text book of Electrical Technology”, Vol.II, S.C Chand and Co., New Delhi,

2007.

2. Del Toro, V., “Electrical Engineering Fundamentals”, Prentice Hall
of India, New
Delhi, 1995.

3. Cotton, H., “Advanced Electrical
Technology”, Sir
Isaac Pitman and Sons Ltd., London, 1999.