EE8301- ELECTRICAL MACHINES – I Syllabus 2017 Regulation
ELECTRICAL MACHINES EE8301- ELECTRICAL MACHINES – I Syllabus 2017 Regulation
EE8301 ELECTRICAL MACHINES – I L T P C
2 2 0 3
To impart knowledge on the following Topics
- Magnetic-circuit analysis and introduce magnetic materials
- Constructional details, the principle of operation, prediction of performance, the
methods of testing the transformers and three phase transformer connections.
- Working principles of electrical machines using the concepts of electromechanical
energy conversion principles and derive expressions for generated voltage and torque
developed in all Electrical Machines.
- Working principles of DC machines as Generator types, determination of their noload/
load characteristics, starting and methods of speed control of motors.
- Various losses taking place in D.C. Motor and to study the different testing methods to
arrive at their performance.
UNIT I MAGNETIC CIRCUITS AND MAGNETIC MATERIALS 6+6
Magnetic circuits –Laws governing magnetic circuits – Flux linkage, Inductance and energy –
Statically and Dynamically induced EMF – Torque – Properties of magnetic materials,
Hysteresis and Eddy Current losses – AC excitation, introduction to permanent magnets-
Transformer as a magnetically coupled circuit.
UNIT II TRANSFORMERS 6+6
Construction – principle of operation – equivalent circuit parameters – phasor diagrams,
losses – testing – efficiency and voltage regulation-all day efficiency-Sumpner’s test, per unit
representation – inrush current – three phase transformers-connections – Scott Connection
– Phasing of transformer– parallel operation of three phase transformers-auto transformer – tap changing transformers- tertiary winding.
UNIT III ELECTROMECHANICAL ENERGY CONVERSION AND CONCEPTS
IN ROTATING MACHINES 6+6
Energy in magnetic system – Field energy and co energy-force and torque equations –
singly and multiply excited magnetic field systems-mmf of distributed windings – Winding
Inductances-, magnetic fields in rotating machines – rotating mmf waves – magnetic
saturation and leakage fluxes.
UNIT IV DC GENERATORS 6+6
Construction and components of DC Machine – Principle of operation – Lap and wave
windings-EMF equations– circuit model – armature reaction –methods of excitationcommutation
– interpoles compensating winding –characteristics of DC generators.
UNIT V DC MOTORS 6+6
Principle and operations – types of DC Motors – Speed Torque Characteristics of DC Motorsstarting
and speed control of DC motors –Plugging, dynamic and regenerative brakingtesting
and efficiency – Retardation test- Swinburne’s test and Hopkinson’s test – Permanent
Magnet DC (PMDC)motors-applications of DC Motor
TOTAL : 60 PERIODS
- Ability to analyze the magnetic-circuits.
- Ability to acquire the knowledge in constructional details of transformers.
- Ability to understand the concepts of electromechanical energy conversion.
- Ability to acquire the knowledge in working principles of DC Generator.
- Ability to acquire the knowledge in working principles of DC Motor
- Ability to acquire the knowledge in various losses taking place in D.C. Machines
1. Stephen J. Chapman, ‘Electric Machinery Fundamentals’4th edition, McGraw Hill
Education Pvt. Ltd, 2010.
2. P.C. Sen‘Principles of Electric Machines and Power Electronics’ John Wiley & Sons;
3rd Edition 2013.
3. Nagrath, I.J. and Kothari.D.P., Electric Machines’, McGraw-Hill Education, 2004
1. Theodore Wildi, “Electrical Machines, Drives, and Power Systems”, Pearson
Education., (5th Edition), 2002.
2. B.R. Gupta ,’Fundamental of Electric Machines’ New age International Publishers,3rd
Edition ,Reprint 2015.
3. S.K. Bhattacharya, ‘Electrical Machines’ McGraw – Hill Education, New Delhi, 3rd
4. Vincent Del Toro, ‘Basic Electric Machines’ Pearson India Education, 2016.
5. Surinder Pal Bali, ‘Electrical Technology Machines & Measurements, Vol.II, Pearson,
6. Fitzgerald. A.E., Charles Kingsely Jr, Stephen D.Umans, ‘Electric Machinery’, Sixth
edition, McGraw Hill Books Company, 2003.