Page 47 - REC :: B.E. EEE CURRICULUM & SYLLABUS - R2017

Dept of EEE, REC

UNIT III DC MOTORS 9
Principle of operation – Back emf and torque equation – Series, Shunt and Compound motors –
Characteristics - Starting – Types of starters – Speed control.

UNIT IV TRANSFORMERS 12
Constructional details of core and shell type transformers – Types of windings – Principle of operation –
emf equation – Transformer on no-load – Parameters referred to HV / LV windings – Equivalent circuit –
Transformer on load – Regulation – Parallel operation of single phase transformers – Auto transformer –
Three phase transformers – Vector group- tap changing.

UNIT V TESTING OF DC MACHINES AND TRANSFORMERS 8
Losses and efficiency in DC machines and transformers – Condition for maximum efficiency – Testing of
DC machines – Brake test, Swinburne’s test, Retardation test and Hopkinson’s test – Testing of
transformers – Polarity test, Sumpner’s test, load test – All day efficiency.

TOTAL (L=45+T=15) = 60 PERIODS
OUTCOMES:
On completion of the course, the students will be able to
● understand the concept of rotating machines and the principle of electromechanical energy
conversion in single and multiple excited systems.
● understand the generation of DC voltages by using different type of generators and study their
performance.
● understand the working principles of DC motors and their load characteristics, starting and
methods of speed control.
● understand the constructional details of different type of transformers, working principle and their
performance.
● estimate the various losses taking place in D.C. machines and transformers and to study the
different testing method to arrive at their performance.

TEXT BOOKS:

1. D.P. Kothari and I.J. Nagrath, “Electric Machines”, Tata McGraw Hill Publishing Company Ltd,
th
4 edition, 2010.
th
2. P.S. Bimbhra, “Electrical Machinery”, Khanna Publishers, 7 edition, 2003.
3. B. L. Theraja and AK Theraja, “A Text book of Electrical Technology”, Volume 2, S. Chand
Publications, 2015.

REFERENCES:
1. A.E. Fitzgerald, Charles Kingsley, Stephen.D.Umans, “Electric Machinery”, Tata McGraw Hill
th
publishing Company Ltd, 6 edition, 2003.
2. J.B. Gupta, “Theory and Performance of Electrical Machines”, S.K.Kataria and Sons, 2009.
3. K. Murugesh Kumar, “Electric Machines”, Vikas publishing house Pvt Ltd, 2002.

Curriculum and Syllabus | B.E. Electrical and Electronics Engineering | R2017 Page 47