Principles of Electromechanical Energy Conversion - Introduction, Flow of energy in electromechanical devices, Energy in magnetic systems (Defining energy and Co-energy), Singly excited systems; Determination of mechanical force, Mechanical energy, Torque equation, Doubly excited systems; Energy stored in magnetic field, Electromagnetic torque, Generated e.m.f. in machines; Torque in machines with cylindrical air gap .
D.C. Machines : Construction of d.c. machines, Armature winding, E.M.F. and torque equation, Armature reaction, Commutation, Interpoles and compensating windings, Performance characteristics of d.c. generators.
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).
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 and demerits and applications.
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.