Syllabus of EMEC-1

               NEE – 301: ELECTRO-MECHANICAL ENERGY CONVERSION –I

Unit – I

Principles of Electro-mechanical Energy Conversion- Introduction, Flow of Energy in Electromechanical Devices, Energy in magnetic systems (defining energy & Co-energy), Singly excited systems; Determination of mechanical force, Mechanical energy, Torque equation, Doubly excited Systems; Energy stored in magnetic field, Electromagnetic torque , Generated emf in machines; Torque in machines with cylindrical air gap. (7) 

Unit – II

 D.C. Machines- Construction of DC Machines, Armature winding, Emf and torque equations, Armature reaction, Commutation, Interpoles and compensating windings, Performance characteristics of D.C. generators. (9) 

Unit –III 

D.C. Machines (Contd.)- Performance characteristics of D.C. motors, Starting of D.C. motors; 3 point and 4 point starters, Speed control of D.C. motors; Field control, Armature control and Voltage control (Ward Lenonard method); Efficiency and Testing of D.C. machines (Hopkinson’s and Swinburn’s Test). (8)

 Unit – IV

 Single Phase Transformer- Phasor diagram, Efficiency and voltage regulation, All day efficiency. Testing of Transformers- O.C. and S.C. tests, Sumpner’s test, Polarity test. Auto  Transformer- Single  phase  and  three  phase  auto  transformers,  Volt-amp  relation, Efficiency, Merits & demerits and applications. (8)

 Unit – V 

Three Phase Transformers - Construction, Three phase transformer, Phasor groups and their connections, Open delta connection, Three phase to 2 phase, 6 phase or 12 phase connections and their applications, Parallel operation of single phase and three phase transformers and load sharing, Excitation phenomenon and harmonics in transformers, Three winding transformers.(9)

 Text Books:

 1. I.J. Nagrath & D.P.Kothari, “ Electrical Machines”, Tata McGraw Hill 

2. Husain Ashfaq , “ Electrical Machines”, Dhanpat Rai & Sons

 3. P.S.Bimbhra, “Electrical Machinery”, Khanna Publisher 

4. A.E. Fitggerald, C.Kingsley Jr and Umans, “Electric Machinery”, McGraw Hill, International Student Edition

 Reference Books:

 5. Irving L.Kosow, “Electric Machine and Tranformers”, Prentice Hall of India.

 6. M.G. Say, “The Performance and Design of AC machines”, Pit man & Sons. 

7. P.S. Bimbhra, “ Generalized Theory of Electrical Machines”, Khanna Publishers