Course Title and Code
Electrical Machines (EE2020A)
Target Programme
UG
Target Discipline
EE
Course Credit
3-0-2-4 (Lecture-Tutorial-Practical-Total Credits)
Course Category
Core
Prerequisites
Electric and Magnetic Circuits (EE2xxx)
Course Content
| Topic | Lecture Hours |
|---|---|
| Introduction: Review of magnetic circuits, concept of self inductance, mutual inductance, leakage inductance, B-H characteristics and magnetizing current for single phase and 3 phase systems. | 3 |
| General Theory: General concepts in electro-mechanical energy conversion, singly excited systems, doubly excited systems and torque production. Dynamical equations governing the electro-mechanical systems. | 5 |
| Constructional Aspects: Constructional aspects of electrical machines, study of different winding types, winding distribution factor, induced emf in distributed winding and emf polygon concepts, mmf distribution, concept of stationary, pulsating and rotating magnetic fields, concept of synchronous and asynchronous operation, losses in electrical machines and efficiency. | 12 |
| Steady State Analysis of Electrical Machines: Analysis of classical electrical machines using equivalent circuits (Transformer, DC machines, Synchronous machines, Induction machines) analyzing the performance characteristics of various electrical machines. | 16 |
| Speed Control Concepts of Electrical Machines: Concepts of dc and ac motor starting methods and speed control, introduction to electric drives and control. | 4 |
| Special Machines: Introduction to special machines like BLDC, PMSM, SRM etc and its applications. | 2 |
| Lab Exercises: Introduction and familiarization of lab equipment's (3 hour session); Experiments including B-H characteristics, estimation of parameters, stationary, rotating and pulsating magnetic fields, SC and OC test of transformer, load test on transformer, OCC of dc shunt generator, OCC and SC test of alternator, no load and B-R test of Induction motor, starting methods of induction motor, load test on induction motor. | 24 |
Learning Outcomes
- Basic understanding of electrical machines and its test procedures.
- Understanding of constructional and operational aspects of classical electrical machines.
- Ability to analyze electrical machines using equivalent circuits.
Text/Reference Books
- Fitzgerald, Kingsley and Umans, Electric Machinery, sixth edition, Tata McGraw Hill, New Delhi, 2002. ISBN-10 : 0070530394, ISBN-13 : 978-0070530393
- Nagrath and Kothari, Electric Machines, Fourth edition, Tata McGraw Hill, New Delhi, 2010. ISBN: 9780070699670, 0070699674
- Stephen J Chapman, Electric Machinery Fundamentals, Fourth Edition, McGraw Hill, Singapore 2005. ISBN 0072465239, 9780072465235
- John Hindmarsh, Electric Machines and their Applications, Pergamon Press, London, 1977. ISBN-10 : 0080211658, ISBN-13 : 978-0080211657