EE8301 - ELECTRICAL MACHINES – I (Syllabus) 2017-regulation Anna University

EE8301 - ELECTRICAL MACHINES – I (Syllabus) 2017-regulation Anna University

EE8301

ELECTRICAL MACHINES – I

 LTPC

3003

OBJECTIVES: 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 no- load/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 excitation- commutation - 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 Motors- starting and speed control of DC motors –Plugging, dynamic and regenerative braking- testing and efficiency – Retardation test- Swinburne’s test and Hopkinson’s test - Permanent Magnet DC (PMDC)motors-applications of DC Motor

TOTAL: 60 PERIODS

OUTCOMES:
• 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

TEXT BOOKS:
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

REFERENCES:
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 Edition,2009.
4. Vincent Del Toro, ‘Basic Electric Machines’ Pearson India Education, 2016.
5. Surinder Pal Bali, ‘Electrical Technology Machines & Measurements, Vol.II, Pearson, 2013.
6. Fitzgerald. A.E., Charles Kingsely Jr, Stephen D.Umans, ‘Electric Machinery’, Sixth edition, McGraw Hill Books Company, 2003.

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