Note for Electrical Machine 2 - EM2 by MD WESH KARNI

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Lecture Notes–Electrical Machine-II [BEE 1401] Part-I Page |1 LECTURE NOTES ON ELECTRICAL MACHINE-II Subject Code - BEE 1401 For B-Tech 4th SEM EE & EEE [Part-I] [Module-I & II] VEER SURENDRA SAI UNIVERSITY OF TECHNOLOGY Department of Electrical Engineering Burla, Sambalpur, Odisha 768018 www.vssut.ac.in EE DEPT. Veer Surendra Sai University of Technology, Burla

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Lecture Notes–Electrical Machine-II [BEE 1401] Part-I Page |2 Disclaimer This document does not claim any originality and cannot be used as a substitute for prescribed textbooks. The information presented here is merely a collection by the committee members for their respective teaching assignments. Various sources as mentioned at the end of the document as well as freely available material from internet were consulted for preparing this document. The ownership of the information lies with the respective authors or institutions. Further, this document is not intended to be used for commercial purpose and the committee members are not accountable for any issues, legal or otherwise, arising out of use of this document. The committee members make no representations or warranties with respect to the accuracy or completeness of the contents of this document and specifically disclaim any implied warranties of merchantability or fitness for a particular purpose. The committee members shall not be liable for any loss of profit or any other commercial damages, including but not limited to special, incidental, consequential, or other damages. EE DEPT. Veer Surendra Sai University of Technology, Burla

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Lecture Notes–Electrical Machine-II [BEE 1401] Part-I Page |3 Detailed Syllabus Department of Electrical Engineering, Veer Surendra Sai University of Technology, Orissa, Burla, India Syllabus of Bachelor of Technology in Electrical Engineering, 2010 ELECTRICAL MACHINES-II (3-1-0) (4th SEMESTER) Subject Code: BEE 1401 MODULE-I (10 HOURS) Fundamental Principles of A.C. Machines: E.M.F. equation of an elementary alternator, Single & three Phase, relation between speed & frequency, factors affecting the induced e.m.f., full pitch & fractional pitch windings, winding factors, armature reaction, the rotating field leakage reactance. Concept of time phasor & space phasor. Synchronous Generator: Various types & construction, cylindrical rotor theory, phasor diagram, open circuit & short circuit characteristics, armature reaction reactance, synchronous reactance, SCR, load characteristics, potier reactance, voltage regulation, EMF method, MMF method, modified MMF method, ZPF method, power angle characteristics. MODULE-II (10 HOURS) Theory of salient pole machine: Blondel’s two reaction theory, phasor diagram, direct axis and quadrature axis synchronous reactances, power angle characteristics, Slip Test. Parallel operation: Synchronising method, effect of wrong synchronising, load sharing between alternators in parallel. Sudden Short Circuit of a Synchronous Generator, Transient and Sub-transient reactances. Synchronous Motor: General Physical consideration, torque and power relations in non-salient pole and salient pole motors, V-curves & inverted V-curves, Effect of change of excitation, synchronous condenser, starting of Synchronous Motor, performance characteristics, of synchronous motor. Hunting, Synchronous Induction motor. MODULE-III (10 HOURS) Three Phase Induction Motors: Types, Construction and principle of operation, 3 phase Induction Motor, general phasor diagram, equivalent circuit, power and torque relations, condition for maximum torque, circle diagram, Performance characteristics, effect of rotor resistance on speed torque characteristics, stable & unstable region of operation, Operation with unbalanced supply voltage. Starting: Starting of 3 phase induction motors, high starting torque motors, speed control, rheostatic method, pole changing method cascade control of speed, Double cage induction motor, Cogging and Crawling of Induction motor, induction generator MODULE-IV (10 HOURS) Single phase induction motor, theory of operation (Double revolving field theory, equivalent circuit, Determination of parameters) Methods of starting, split phase starting, Repulsion starting, shaded pole starting, performance characteristics. Single phase series motor, theory of operation performance and application, Shcrage motor, Universal Motor. BOOKS [1]. M. G. Say, “Performance and design of AC machines”, CBS Publishers. [2]. A. E. Fritzgerald, C. Kingsley, and S. Umans, “Electric Machinery”, MGH Publisher. [3]. I. J. Nagrath, D. P. Kothari, “Electric Machines”, TMH Publishers. [4]. A. S. Langsdorf, “Theory of Alternating Current Machinery”, TMH Edition. [5]. E. O. Taylor, “The Performance EE DEPT. Veer Surendra Sai University of Technology, Burla

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Page |4 Lecture Notes–Electrical Machine-II [BEE 1401] Part-I Syllabus of Bachelor of Technology in Electrical Engineering (4th SEMESTER) ELECTRICAL MACHINES-II Subject Code: BEE 1401 Topics Page No. MODULE-I Fundamental Principles of A.C. Machines: E.M.F. equation of an elementary alternator, Single & three Phase, relation between speed & frequency, factors affecting the induced e.m.f., full pitch & fractional pitch windings, winding factors, armature reaction, the rotating field leakage reactance. Concept of time phasor & space phasor. Synchronous Generator: Various types & construction, cylindrical rotor theory, phasor diagram, open circuit & short circuit characteristics, armature reaction reactance, synchronous reactance, SCR, load characteristics, potier reactance, voltage regulation, EMF method, MMF method, modified MMF method, ZPF method, power angle characteristics. 5-39 MODULE-II Theory of salient pole machine: Blondel’s two reaction theory, phasor diagram, direct axis and quadrature axis synchronous reactances, power angle characteristics, Slip Test. Parallel operation: Synchronizing method, effect of wrong synchronizing, load sharing between alternators in parallel. Sudden Short Circuit of a Synchronous Generator, Transient and Sub-transient reactances. Synchronous Motor: General Physical consideration, torque and power relations in non-salient pole and salient pole motors, V-curves & inverted V-curves, Effect of change of excitation, synchronous condenser, starting of Synchronous Motor, performance characteristics, of synchronous motor. Hunting, Synchronous Induction motor. EE DEPT. 40-79 Veer Surendra Sai University of Technology, Burla