VEER SURENDRA SAI UNIVERSITY OF TECHNOLOGY
Veer Surendra Sai University of Technology, Orissa, Burla, India
Department of Electrical Engineering,
Syllabus of Bachelor of Technology in Electrical & Electronics Engineering, 2010
ELECTRICAL MACHINES-I (3-1-0)
MODULE-I (10 HOURS)
Electromechanical Energy conversion, forces and torque in magnetic field systems – energy balance,
energy and force in a singly excited magnetic field system, determination of magnetic force ,
coenergy, multi excited magnetic field systems.
DC Generators – Principle of operation, Action of commutator, constructional features, armature
windings, lap and wave windings, simplex and multiplex windings, use of laminated armature, E.
Methods of Excitation: separately excited and self excited generators, build up of E.M.F., critical
field resistance and critical speed , causes for failure to self excite and remedial measures, Armature
reaction: Cross magnetizing and demagnetizing AT/pole, compensating winding, commutation,
reactance voltage, methods of improving commutation
Load characteristics of shunt, series and compound generators, parallel operation of DC generators,
use of equalizer bar and cross connection of field windings, load sharing.
MODULE-II (10 HOURS)
Transformers: Single phase transformer, Constructional details, Core, windings, Insulation,
principle of operation, emf equation, magnetising current and core losses, no load and on load
operation, Phasor diagram, equivalent circuit, losses and efficiency, condition for maximum
efficiency, voltage regulation, approximate expression for voltage regulation, open circuit and short
circuit tests, Sumpner’s test, Inrush of switching currents, harmonics in single phase transformers,
magnetizing current wave form, Parallel operation of transformers.
MODULE-III (10 HOURS)
DC Motors: Principle of operation, Back E.M.F., Torque equation, characteristics and application of
shunt, series and compound motors, Armature reaction and commutation, Starting of DC motor,
Principle of operation of 3 point and 4 point starters, drum controller, Constant & Variable losses,
calculation of efficiency, condition for maximum efficiency.
ELECTRICAL MACHINE 1 (BEE-1302)