Course Details

Subject {L-T-P / C} : EE2002 : Electrical Machines - II {3-1-0 / 4}
Subject Nature : Theory
Coordinator : Prof. Gopalakrishna Srungavarapu


Synchronous Machine: [11L]

Type and construction, Voltage regulation, Phasor diagram-Blondel two reaction theory, load characteristics, measurement of machine parameters, Unsymmetriical operation,
physical consideration, torque and power relations, V and O curves, hunting and surging, variable torque loading,
Parallel operation
Synchronization, division of load between alternators, governor characteristics, parallel operation of dissimilar generators.

Induction Machines:[ 9L]
Construction, the principle of operation, mechanical power developed and torque, the circle diagram, exact circle diagram, speed control.
Construction, the theory of operation, self-sufficient design, and power factor improvement
Single Phase Motor
Double field revolving theory, construction, and operation,

Special and Advanced Machine [6L]:

AC commutator machines, BLDC motor, PMSM, the theory of operations

Reference Frame Theory [ 14L]

A basic representation of circuits as a matrix, reference frame theory, equation of transformation, change of variables, standard transformation, the transformation of a balaced set, Balanced steady-state phasor relationship, variables observed from different frames, Transient operation analysis, Obtaining dynamic model of the Synchronous machine for the different operating conditions, Obtain dynamic model for the induction machine for different operating conditions.

Course Objectives

  1. Comprehend the principle of operation, characteristics, testing and starting methods of basic three phase and single phase ac machines and their application.
  2. Understand the constructional details, types of windings, advantages of distributed and fractional pitched windings of basic ac machines.
  3. To bring a basic knowledge about the latest developments in machines: BLDC machines and Switched reluctance motors.

Course Outcomes

At the end of the course, the student will be able to
1 select an appropriate machine with proper ratings for a given applications
2 describe various testing methods to obtain the equivalent circuit parameters of induction and synchronous machines.
3 assimilate all the fundamental knowledge required for understanding electrical machine drives and other advanced courses in machines

Essential Reading

  1. .I. J. Nagarath and D. P. Kothari, Electric Machines, T.M.H. Publishing Co. Ltd. , New Delhi, 4th edition 2010
  2. J. Stephen, Chapman, Electric Machinery Fundamentals, Mc Graw-Hill International , 1991.

Supplementary Reading

  1. Fitzgerald, Kingsley and Umans, Electric Machinery, Mc Graw Hill , New Delhi, 7th Edition, 2013
  2. A. S. Langsdorf, Theory of A. C. Machines, TMH , 2001