Course Details
Subject {L-T-P / C} : EE3000 : Electrical Machines { 3-0-0 / 3}
Subject Nature : Theory
Coordinator : Dr. Indrajit Sarkar
Syllabus
Module I - Transformer: Single-phase Transformer: Review of EMF equation and equivalent circuit, phasor diagrams on lo-load and full-load, per-unit representation of transformer parameters, voltage regulation, losses and efficiency, OC and SC test, all-day efficiency, parallel operation of transformers.
Module II - Three-phase Transformer: Construction of various types, operating characteristics of star–star, star–delta, delta–star, delta–delta, open–delta connections, vector groups.
Module III - DC Motor: Review of emf and torque equations, classification, losses and efficiency, Swinburne’s test and Hopkinson’s test, torque /speed characteristics, and speed control of shunt and series motors.
Module IV - Induction Machine: Three-phase induction motor: Construction and principle of operation, equivalent circuit and phasor diagram, torque-slip characteristics, no-load and blocked-rotor test, starting and speed control.
Module V - Single-phase induction motor: Principle of operation, torque-slip characteristics, starting methods.
Module VI - Synchronous Machines: Constructional features, synchronous generators and motors, equivalent circuit and phasor diagram, power and torque characteristics, voltage regulation of non-salient pole alternators by synchronous impedance method, V-curve and inverted-V curve, starting of synchronous motors.
Course Objectives
- Understand the various types of dc and ac electrical machines.
- Understand the operating principles, testing methods, and connections of transformers, dc machines, induction machines, and synchronous machines.
- Performance analysis of transformers, dc machines, induction machines, and synchronous machines.
- Understanding the concepts of starting, braking, and/or speed control dc machines, induction machines, and synchronous machines.
Course Outcomes
1. Understanding the concepts of various types of electrical machines. <br />2. Determine the induced/back emf and torque equations of different linds of electrical machines. <br />3. Performance analysis of single-, and three-phase transformers and various types of rotating machines. <br />4. Determine the various characteristics of rotating electrical machines. <br />5. Investigate the various starting, braking, and/or speed control methods of rotating machines.
Essential Reading
- A.E. Fitzagerald, C.M. Kingsley (Jr) and Umans, Electric Machinery, Tata McGraw Hill Education Pvt. Ltd. , 2003
- D. P. Kothari and I. J. Nagrath, Electric Machines, Tata McGraw Hill Education Pvt. Ltd. , 2010
Supplementary Reading
- I. L. Kosow, Electric Machinery & Transformers, PHI Learning Pvt. Ltd. , 2001
- A. S. Langsdorf, Theory of A. C. Machines, Tata McGraw Hill Education Pvt. Ltd. , 2001