Electrical Machines-I Materials

 Electrical Machines-I 

Syllabus:

                    Principle of electromechanical energy conversionforces and torque in magnetic field systems, energy balance in magnetic circuits, magnetic force, co-energy in singly excited and multi excited magnetic field system.

You can download the Notes by clicking on the EMEC Notes link.

DC Generators

Syllabus:

                    Principle of operation, constructional details, armature windings and its types, EMF equation, wave shape of induced emf, armature reaction, demagnetizing and cross magnetizing ampere turns, compensating winding, commutation, methods of improving commutation, interpoles, OCC and load characteristics of different types of DC Generators.

Parallel operation of DC Generators: DC Shunt and DC series Generators in parallel, equalizing connections- applications of DC Generators.

You can download the Notes by clicking on the DC Generators link.

DC Motors

Syllabus:

                    Principle of operation, significance of back emf, torque equations and power developed by armature, speed control of DC motors, starting methods of DC motors, operation and design of 3-point and 4-point starters, load characteristics of DC motors, losses and efficiency in DC machine, condition for maximum efficiency.

You can download the Notes by clicking on the DC Motors link.

Single Phase Transformers

Syllabus:

                    Construction and principle of operation, equivalent circuit, phasor diagrams, testing - polarity test, open circuit and short circuit tests, voltage regulation, losses and efficiency, back-to-back

test, separation of core losses, parallel operation of single-phase transformers, applications of single-phase transformer.

You can download the Notes by clicking on the Single phase Transformers link.

Three Phase Transformers

Syllabus:

Autotransformer:

                    Construction and working of auto transformer, comparison with two winding transformers, applications of autotransformer.

Three-Phase Transformer:

                     Construction, types of connections and their comparative features, Scott connection,

applications of Scott connection.

You can download the Notes by clicking on the Three phase Transformers link.

DOWNLOAD Complete Notes

For the syllabus of all units in EM-I, you can download by clicking on the EM-I Notes link.