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JNTUK R19 2-2 Electrical Machines-II Material/Notes PDF Download
Students those who are studying JNTUK R19 EEE Branch, Can Download Unit wise R19 2-2 Electrical Machines-II (EM-2) Material/Notes PDFs below.
JNTUK R19 2-2 Electrical Machines-II Material/Notes PDF Download
Preamble: This course covers the topics on 3-phase induction motor, 1-phase induction motor and synchronous machines which have wide application in power systems. The main aim of the course is to provide a detailed analysis of operation and performance of 3-phase induction motor, 1-phase induction motor and synchronous machines. In addition, it also covers voltage regulation and parallel operation of synchronous generators.
OBJECTIVES:
- Understand the principle of operation and performance of 3-phase induction motor.
- Quantify the performance of induction motor and induction generator in terms of torque and slip.
- To understand the torque producing mechanism of a single phase induction motor.
- To understand the principle of emf generation, the effect of armature reaction and predetermination of voltage regulation in synchronous generators.
- To study parallel operation and control of real and reactive powers for synchronous generators.
- To understand the operation, performance and starting methods of synchronous motors.
UNIT-1
3-phase induction motors Construction details of cage and wound rotor machines – production of rotating magnetic field – principle of operation – rotor emf and rotor frequency – rotor current and power factor at standstill and during running conditions – rotor power input, rotor copper loss and mechanical power developed and their interrelationship – equivalent circuit – phasor diagram
UNIT-2
Characteristics, starting and testing methods of induction motors Torque equation – expressions for maximum torque and starting torque – torque slip characteristic –double cage and deep bar rotors – crawling and cogging – speed control of induction motor with V/f control method –no load and blocked rotor tests – circle diagram for predetermination of performance – methods of starting –starting current and torque calculations – induction generator operation (Qualitative treatment only)
UNIT-3
Single Phase Motors Single phase induction motors – constructional features and equivalent circuit – problem of starting– double revolving field theory Starting methods, AC series motor.
UNIT-4
Construction, operation and voltage regulation of synchronous generator Constructional features of non-salient and salient pole type armature windings – distributed and concentrated windings – distribution, pitch and winding factors – E.M.F equation – improvements of waveform and armature reaction – voltage regulation by synchronous impedance method –MMF method and Potier triangle method – phasor diagrams – two reaction analysis of salient pole machines and phasor diagram.
Parallel operation with infinite bus and other alternators – synchronizing power – load sharing – control of real and reactive power – numerical problems.
UNIT–5
Synchronous motor – operation, starting and performance Synchronous motor principle and theory of operation – phasor diagram – starting torque – variation of current and power factor with excitation –synchronous condenser – mathematical analysis for power developed– hunting and its suppression – methods of starting – applications.
TEXT BOOKS:
- Electrical Machines by P.S. Bhimbra, Khanna Publishers
- Electric Machinery by A.E.Fitzgerald,Charles kingsley,Stephen D.Umans, TMH
REFERENCE BOOKS:
- Electrical Machines by D. P.Kothari, I .J .Nagarth,Mc Graw Hill Publications, 4th edition
- Electrical Machines by R.K.Rajput, Lakshmi publications,5th edition
- Electrical Machinery by Abijith Chakrabarthi and Sudhipta Debnath, Mc Graw Hill education 2015
- Electrical Machinery Fundamentals by Stephen J Chapman Mc Graw Hill education 2010
- Electric Machines by Mulukutla S.Sarma&Mukesh k.Pathak, CENGAGE Learning.
- Theory & Performance of Electrical Machines by J.B.Guptha. S.K.Kataria & Sons
- Alternating Current Machines by A.F.Puchstein, T.C. Lloyd, A.G. Conrad, ASIA Publishing House Performance and design of AC machines – M.G. Say.
OUTCOMES:
- explain the operation and performance of three phase induction motor.
- analyze the torque-speed relation, performance of induction motor and induction generator.
- explain design procedure for transformers and three phase induction motors.
- implement the starting of single phase induction motors.
- perform winding design and predetermine the regulation of synchronous generators.
- avoid hunting phenomenon, implement methods of staring and correction of power factor with synchronous motor.
