Unit: I Branch: B.E (EEE) Semester: IV Page 1 of 6 Unit Syllabus: MAGNETIC CIRCUITS AND MAGNETIC MATERIALS 12 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. Objective: To introduce techniques of magnetic-circuit analysis and introduce magnetic materials 1 Introduction to Electrical and Magnetic circuits 50 1,3,7 PPT 2 Laws governing magnetic circuits 50 1,3,7 PPT 3 Flux linkage, Inductance and energy 50 1,3,7 PPT 4 Statically and Dynamically induced EMF 50 1,3,7 PPT 5 Torque Properties of magnetic materials 50 1,3,7 PPT 6 Problems on magnetic circuits 50 1,3,7 PPT,BB 7 Hysteresis and Eddy Current losses 50 1,3,7 PPT 8 Problems on losses 50 1,3,7 PPT,BB 9 AC excitation, introduction to permanent magnets 50 1,3,7 PPT 10 Transformer as a magnetically coupled circuit. 50 1,3,7 PPT 11 AC operation of magnetic circuits 50 1,3,7 PPT 12 Problems on magnetic circuits 50 1,3,7 PPT,BB
Unit: II Branch: B.E (EEE) Semester: IV Page 2 of 6 Unit Syllabus: TRANSFORMERS 15 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. Objective: To familiarize the constructional details, the principle of operation, prediction of performance, the methods of testing the transformers and three phase transformer connections. 13 Introduction to transformers 50 1,9 PPT 14 Construction and principle of operation of 50 1,9 PPT Transformer 15 EMF equation derivation, Transformer 50 1,9 PPT operation with no load 16 Transformer operation with load 50 1,9 PPT 17 Equivalent circuit of transformer 50 1,9 PPT 18 Losses in transformer and Testing of transformers 50 1,9 PPT 19 Efficiency and voltage regulation-all day 50 1,9 PPT efficiency 20 Problems on transformer equivalent circuits 50 1,9 PPT,BB 21 Problems on transformer testing & efficiency and voltage regulation 50 1,9 PPT,BB 22 Sumpner s test, per unit representation inrush 50 1,9 PPT current 23 Scott Connection & Phasing of transformer 50 1,9 PPT 24 parallel operation of three phase transformers- 50 1,9 PPT Auto transformer 25 Tap changing transformers- tertiary winding. 50 1,9 PPT 26 Parallel operation of transformers 50 1,9 PPT 27 Problems on Parallel operation of transformer 50 1,9 PPT,BB
Unit: III Branch: B.E (EEE) Semester: IV Page 3 of 6 Unit Syllabus: ELECTROMECHANICAL ENERGY CONVERSION AND CONCEPTS IN ROTATING MACHINES 10 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. Objective: To study the 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. 28 Energy in magnetic system 50 1,3,7 PPT 29 Field energy and co energy-force and torque equations 50 1,3,7 PPT 30 Singly and Multiply excited magnetic field systems 50 1,3,7 PPT 31 Problems on singly excited system 50 1,3,7 PPT,BB 32 Problems on multiply excited system 50 1,3,7 PPT,BB 33 MMF of distributed windings 50 1,3,7 PPT 34 Winding Inductances, magnetic fields in rotating machines 50 1,3,7 PPT 35 Rotating MMF waves 50 1,3,7 PPT 36 Magnetic saturation and leakage fluxes. 50 1,3,7 PPT 37 Problems on field energy and force 50 1,3,7 PPT,BB
Unit: IV Branch: B.E (EEE) Semester: IV Page 4 of 6 Unit Syllabus: DC GENERATORS 12 Construction and components of DC Machine Principle of operation - Lap and wave windings- EMF equations circuit model armature reaction methods of excitation-commutation and inter poles -compensating winding characteristics of DC generators. Objective: To study the working principles of DC machines as Generator types, determination of their no-load/load characteristics, starting and methods of speed control of motors. 38 Introduction to DC Machines 50 1,5,7,9 PPT, Video 39 Construction and components of DC Machine 50 1,5,7,9 PPT 40 Principle of operation, Lap and wave windings, 50 1,5,7,9 PPT 41 EMF equations,pitch factor and Distribution 50 1,5,7,9 PPT factor 42 Problems on EMF induced in DC Generators 50 1,5,7,9 PPT,BB 43 Circuit model of Shunt, Series and Compound 50 1,5,7,9 PPT Generator-Armature reaction 44 Types of DC Generators -s of excitation 50 1,5,7,9 PPT 45 Commutation and inter poles 50 1,5,7,9 PPT 46 Need for Compensating winding 50 1,5,7,9 PPT 47 Characteristics of DC Shunt generator, Series 50 1,5,7,9 PPT generator, Compound generator 48 Problems on DC Shunt generator 50 1,5,7,9 PPT,BB 49 Problems on DC Series generator & Compound Generator 50 1,5,7,9 PPT,BB
Sub Code: EE6401 Unit: V Branch: B.E (EEE) Semester: IV Page 5 of 6 Unit Syllabus: DC MOTORS 11 Principle and operations - types of DC Motors Speed Torque Characteristics of DC Motorsstarting 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 motors(pmdc)-dc Motor applications Objective: To estimate the various losses taking place in D.C. Motor and to study the different testing methods to arrive at their performance. 50 Introduction to DC Motor, Principle and 50 1,5,7,9 PPT,Video operation of DC Motor 51 Types of DC Motors- Torque Equation 50 1,5,7,9 PPT 52 Problems on DC Motor Torque 50 1,5,7,9 PPT,BB 53 Speed Torque Characteristics of DC Motors 50 1,5,7,9 PPT 54 Types of Starters-Two, Three &Four Point 50 1,5,7,9 PPT Starters 55 Various method of speed control of DC motors 50 1,5,7,9 PPT 56 Plugging, dynamic and regenerative braking 50 1,5,7,9 PPT 57 Testing and efficiency -Retardation test- 50 1,5,7,9 PPT Swinburne s test 58 Problems on Retardation test- Swinburne s test 50 1,5,7,9 PPT,BB 59 Hopkinson s test & Problems on Hopkinson s test 50 1,5,7,9 PPT,BB 60 Permanent magnet dc motors(pmdc), DC Motor applications 50 1,5,7,9 PPT
Sub Code: EE6401 Unit: I to V Branch: B.E (EEE) Semester: IV Page 6 of 6 Course delivery plan: Weeks 1 2 3 4 5 6 7 8 9 10 11 12 I- 2 Hours II- 2+1 Hours I II I II I II I II I II I II I II I II I II I II I II I II Units 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 4 4 4 4 4, 5 5 5 5 5 TEXT BOOKS: 1. Nagrath I. J and Kothari D. P. Electric Machines, Fourth Edition, Tata McGraw Hill Publishing Company Ltd, 2010. 2. M.N.Bandyopadhyay, Electrical Machines Theory and Practice, PHI Learning PVT LTD., New Delhi, 2009. 3. Fitzgerald. A.E., Charles Kingsely Jr, Stephen D.Umans, Electric Machinery, Sixth edition, Tata McGraw Hill Books Company, 2003. REFERENCES: 4. P. C. Sen., Principles of Electrical Machines and Power Electronics, John Wiley & Sons, 1997. 5. Syed A. Nasar, Electric Machines and Power Systems: Volume I, Mcgraw-Hill College; International Edition, January 1995. 6. Deshpande M. V., Electrical Machines PHI Learning Pvt. Ltd., New Delhi, 2011. 7. P.S. Bimbhra, Electrical Machinery, Khanna Publishers, 2003. 8. S.Sarma & K.Pathak Electric Machines, Cengage Learning India (P) Ltd., Delhi, 9. THERAJA, B.L; THERAJA, A.K. Electrical Technology volume II, S.CHAND,2006 Prepared by Approved by Signature Name T.Annamalai and D.S.Purushothaman Dr.KR.Santha Designation Assistant Professor -EEE HOD-EEE Date 02/01/15 02/01/15