# Electrical Machines-II

Course Code:R162208

Author:uLektz

University:

Regulation:2016

Categories:Electrical & Electronics

Format : ePUB3 (DRM Protected)

Type :eBook

Rs.160 Rs.25 Rs.85% off

Description :Electrical Machines-II of R162208 covers the latest syllabus prescribed by JNTU Kakinada for regulation 2016. Author: uLektz, Published by uLektz Learning Solutions Private Limited.

Note : No printed book. Only ebook. Access eBook using uLektz apps for Android, iOS and Windows Desktop PC.

##### Topics
###### UNIT - I 3-PHASE INDUCTION MOTORS

1.1 Construction details of cage and wound rotor machines

1.2 Production of rotating magnetic field, Principle of operation, Rotor emf and rotor frequency, Rotor current and pf at standstill and during running conditions

1.3 Rotor power input, rotor copper loss and mechanical power developed and their interrelationship

1.4 Equivalent circuit - phasor diagram

###### UNIT - II CHARACTERISTICS, STARTING AND TESTING METHODS OF INDUCTION MOTORS

2.1 Torque equation, Expressions for maximum torque and starting torque

2.2 Torque slip characteristic, Double cage and deep bar rotors, Crawling and cogging, Speed control of induction motor with V/f method

2.3 No load and blocked rotor tests

2.4 Circle diagram for predetermination of performance

2.5 Methods of starting, Starting current and torque calculations, Induction generator operation (Qualitative treatment only)

###### UNIT - III: SINGLE PHASE MOTORS

3.1 Single phase induction motors - Constructional features, Equivalent circuit, Problem of starting, Double revolving field theory

3.2 Starting methods, Shaded pole motors

3.3 AC Series motor

###### UNIT - IV: CONSTRUCTION, OPERATION AND VOLTAGE REGULATION OF SYNCHRONOUS GENERATOR

4.1 Constructional features of non-salient and salient pole type, Armature windings, Distributed and concentrated windings

4.2 Distribution- Pitch and winding factors, E.M.F equation

4.3 Improvements of waveform and armature reaction

4.4 Voltage regulation by synchronous impedance method, MMF method and Potier triangle method, Phasor diagrams

4.5 Two reaction analysis of salient pole machines and phasor diagram

###### UNIT - V: PARALLEL OPERATION OF SYNCHRONOUS GENERATORS

5.1 Parallel operation with infinite bus and other alternators