CSVTU BE III Sem Electrical Engineering Electrical Machines I Syllabus

CSVTU BE III Sem Electrical Engineering Electrical Machines I Syllabus

CHHATISGARH SWAMI VIVEKANAND TECHNICAL UNIVERSITY, BHILAI (C.G.)

Semester:B.E. III Branch: Electrical

Subject: Electrical Machines I

Total Theory Periods: 40 Total Tut Periods: 12

Total Marks in End Semester Exam: 80

Minimum number of Class tests to be conducted: 2

UNIT – I

Review of transformer theory, Auto-transformer equivalent circuit and phasor diagram,

three-phase transformers, core and shell type transformer, three-phase tank, three-phase

unit, different connections and vector groups, three winding transformer connections,

parameters of three winding transformer, coupled circuit view point.

UNIT – II

Parallel operation of single-phase and three-phase transformer, Scott connection, opendelta,

back-to-back test, separation of losses, excitation phenomenon in transformers.

UNIT – III

Electromagnetic principle of DC machine, constructional details, production of voltage

and torque, BLV and BLI concepts, classification of DC machine, conditions of self

excitation, armature reaction and its effect, flux and mmf waves, effect of brush shift,

commutation, methods of improving commutation, Operating characteristics of DC

generator, parallel operation.

UNIT – IV

DC machine as motor, armature reaction, its effect on motor working, electrical and

mechanical characteristics of DC motor, starting and speed control of DC motors, losses

in DC machines, Testing of DC machines, Swinburne’s test, regenerative and retardation

test.

UNIT – V

Cross-field machines, armature winding, transformer cooling, wide band transformer,

pulse transformer, audio frequency transformer.

Text Books:

1. Electrical Machines by Smarajit Ghosh, Pearson Education

2. Performance & Design of A.C. Machines by M.G. Say, C.B.S. Publishers

Reference Books:

1. Performance & Design of D.C. Machines by A.E. Clayton & Hancock, C.B.S.

Pbs.

2. Electric Machines by Nagrath & Kothari

, TMH Pbs.

3. Electric Machines by P.K. Mukherjee & S.Chakravarti, Dhanpat Rai

4. Electrical machines by B. R, Gupta, New age international.

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