Other university, Electrical & Electronics Engineering , Electrical Machines-II Syllabus

Unit - 1 Three Phase Synchronous Machines

Unit 1

Three phase synchronous machines

1.1 Threephase synchronous machines Construction rotatingfield type and rotatingarmature type salientpole and nonsalientpole type and their comparison Excitation Methods

1.2 Three phases Synchronous generator cylindrical rotor type Principle of operation Emf equation and winding factors No derivation rating of generator Generator on noload and on balanced load Armature reaction and its effect under different load power factors Voltage drop due to armature resistance leakage flux and synchronous reactance Per phase equivalent circuit and Phasor diagram Power power angle relation

1.3 Threephase Synchronous generator salient pole type Armature reaction as per Blondel’s two reaction theory for salientpole machines Directaxis and quadratureaxis synchronous reactance’s and their determination by slip test. Phasor diagram of salientpole generator and calculation of voltage regulation

Unit - 2 Voltage Regulation Of Three Phase Synchronous Generator

Unit 2

Voltage regulation of three phase synchronous generator

2.1 Performance of open circuit and short circuit test on synchronous generator

2.2 Determination of voltage regulation by emf mmf and Potier triangle methods.

2.3 Determination of voltage regulation by direct loading

2.4 Short circuit ratio

2.5 Parallel operation of 3phase alternators Necessity conditions Load sharing between two alternators in parallel

2.6 Process of synchronizing alternator with infinite busbar by lamp methods and by use of synchroscope

2.7 Synchronizing current power and torque

Unit - 3 Three Phase Synchronous Motor

Unit 3

Three Phase Synchronous Motor

3.1 Principle of operation

3.2 Methods of starting

3.3 Equivalent circuit significance of torque angle Losses efficiency and Power flow chart

3.4 Operation of 3phase Synchronous motor with constant load and variable excitation ‘V’ Curves and ‘inverted V’ curves

3.5 Phenomenon of hunting and its remedies

3.6 Applications of 3 phase synchronous motors

3.7 Comparison of 3 phase synchronous motor with 3phase induction motor

Unit - 4 3-Ph Induction Motor, Induction Generator And Special Purpose Motors

Unit 4

3 phase induction motor induction generator and special purpose motors

4.1 Speed control of induction motor by various methods Stator side and rotor side controls

4.2 Action of the threephase induction motor as an induction generator

4.3 Applications of induction generator

4.4 Introduction to Energyefficient three phase Induction Motor and Superconducting Generator

4.5 Special Purpose Motors Construction principle of working characteristics ratings and applications of Brush less D.C. Motors

4.6 Stepper motor

4.7 Permanent Magnet motor A.C. D.C.

Unit - 5 A.C. Series Motor

Unit 5

AC series motor

5.1 Operation of D.C. Series motor on A.C. Supply

5.2 Nature of torque developed problems associated with A.C. Operation and remedies

5.3 Compensated series motor Compensating winding conductively and inductively compensated motor

5.4 Approximate phasor diagram

5.5 Use of compoles for improving commutation

5.6 Rating and Applications of Compensated Series motors

5.7 Universal motor Ratings performance and applications

5.8 Comparison of their performance on A.C. and D.C. Supply

Unit - 6 Single Phase Induction Motor

Unit 6

Singlephase induction motor

6.1 Construction of single phase induction motor

6.2 Double revolving field theory of singlephase induction motors

6.3 Torqueslip characteristics on the basis of double revolving field theory

6.4 Equivalent circuit

6.5 Performance calculations of a singlephase IM

6.6 Test to determine the parameters of equivalent circuit and calculation of performance characteristics of motor

6.7 Methods of selfstarting

6.8 Types of singlephase induction motors

6.9 Comparison of 1phase induction motor with a 3phase induction motor.