Course Details
Subject {L-T-P / C} : EE2002 : Electrical Machines - II { 3-1-0 / 4}
Subject Nature : Theory
Coordinator : Dr. Shubhobrata Rudra
Syllabus
Synchronous Machine: [11L]
Alternator types and construction [1L]
Phasor diagram, the concept of synchronous impedance, different methods of voltage regulation calculation, Potier Triangle, measurement of cylindrical rotor machine parameters [3 L]
Blondel two reaction theory, load characteristics, measurement of machine parameters, [2L]
Motor physical consideration, torque and power relations [2 L]
V and O curves, hunting and surging, variable torque loading [1 L]
The parallel operation, synchronization, active, reactive power sharing between alternators, governor characteristics, and parallel operation of dissimilar generators [2 L]
Induction Machines:[ 9L]
Motor Construction, the principle of operation [2 L],
Equation of mechanical power developed and torque[2L]
No load and Blocked Rotor Test, The circle diagram, exact circle diagram[2L],
speed control.[1 L]
Generator
Construction, the theory of operation, self-sufficient design, and power factor improvement
Single Phase Motor, Double field revolving theory, construction, and operation,[2 L]
Double Field Induction Generator [1 L]
Special and Advanced Machine [7L]:
AC commutator machines[2L]
BLDC motor[2L]
Construction of PMSM, the theory of operations characteristics analysis [3L]
Reference Frame Theory [13L]
A basic representation of circuits as a matrix[2L]
Reference frame theory[2L]
Equation of transformation[1L]
Change of variables[1L] Standard transformation[1L]
The transformation of a balaced set[1L]
Balanced steady-state phasor relationship and variables observed from different frames[2L]
Transient operation analysis, Obtaining dynamic model of the Synchronous machine for the different operating conditions, Obtain dynamic model for the induction machine for different operating conditions[3L]
Course Objectives
- Delivering working knowledge on the synchronous machine performance both for the generating and motoring mode, and additionally discussing the parallel operation of the synchronous alternator.
- Providing working knowledge on the operation of the slip ring and squirrel cage Induction machine
- Explaining the matrix representation of many conventional machines and its use in transient analysis of the rotating machines.
- Discussing working principles and scope of applications for different contemporary machines (e.g. PMSM, BLDC, LIM, etc.)
Course Outcomes
1) Examine the performance of a synchronous machine for different operating conditions. <br />2) Analyse the nature of power flow from or to a machine connected to an infinite bus. <br />3) Evaluate the impact of a particular machine parameter on the overall machine performance <br />4) Recommend a suitable starting and speed control method for a specific polyphase induction motor. <br />5) Compare the merits and demerits of several single-phase and fractional kW machines. <br />6) Construct a generalized circuit model for any electrical machine <br />&) Analyse the transient of an electrical machine by utilizing algebraic transformation between the different reference frame
Essential Reading
- .I. J. Nagarath and D. P. Kothari, Electric Machines, T.M.H. Publishing Co. Ltd. , New Delhi, 4th edition 2010
- J. Stephen, Chapman, Electric Machinery Fundamentals, Mc Graw-Hill International , 1991.
Supplementary Reading
- Fitzgerald, Kingsley and Umans, Electric Machinery, Mc Graw Hill , New Delhi, 7th Edition, 2013
- A. S. Langsdorf, Theory of A. C. Machines, TMH , 2001