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Synchronous Machines - MMF Distribution - Rotating Magnetic Field. Alternators

This document outlines an electrical machines course that focuses on rotating magnetic fields, synchronous machines, and induction machines. The course objectives are to understand rotating magnetic fields and the construction and operation of synchronous and induction machines. Students will also analyze the performance of these machines using various methods. The course covers topics like alternators, synchronous motors, induction motors, and speed control methods. Student assessment includes formative assessments like quizzes, assignments, and presentations, as well as summative assessments involving continuous assessments and end semester examinations.

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116 views2 pages

Synchronous Machines - MMF Distribution - Rotating Magnetic Field. Alternators

This document outlines an electrical machines course that focuses on rotating magnetic fields, synchronous machines, and induction machines. The course objectives are to understand rotating magnetic fields and the construction and operation of synchronous and induction machines. Students will also analyze the performance of these machines using various methods. The course covers topics like alternators, synchronous motors, induction motors, and speed control methods. Student assessment includes formative assessments like quizzes, assignments, and presentations, as well as summative assessments involving continuous assessments and end semester examinations.

Uploaded by

kesavant
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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18EE401 Electrical Machines – II 3/1/0/4

Nature of Course : G (Theory & Analytical)


Pre Requisites: Electrical Machines – I
Course Objectives:
1 To know the concepts of rotating magnetic field.
2 To impart the knowledge of synchronous and induction machines.
3 To analyze the performance of synchronous and induction machines.
Course Outcomes:
Upon completion of the course, students shall have ability to
C401.1 Remember the basics of rotating machines. [R]
C401.2 Understand the construction and operation of salient and non-salient pole
[U]
alternators and synchronous motors.
C401.3 Illustrate the construction and operation of single and three phase induction
[U]
motor.
C401.4 Examine the performance of synchronous and induction machines by
[A]
various methods.
Course Contents:
Synchronous machines – MMF distribution – Rotating magnetic field. Alternators:
Constructional details – principle of operation and types of rotor – EMF equation– armature
reaction – voltage regulation – EMF, MMF and ZPF- two reaction theory – synchronization
and synchronizing power – Parallel operation and load sharing, operation on infinite bus-bar
typical applications. Synchronous motors: Starting methods, Synchronous machines on
infinite bus bars, phasor diagram, V and inverted-V curves, Hunting and its suppression,
effect of change in excitation, synchronous condenser.

Induction Machines: Three phase induction motors – Constructional details – principle of


operation and types of rotor – Slip – starting and Maximum torque – slip-torque
characteristics, Starting methods - No load and blocked rotor test – Equivalent circuit – Circle
diagram – crawling and cogging – Separation of no load losses – Induction generators –
Double Cage induction motor. Single-phase Induction motors – double field revolving theory -
Working principle and starting – equivalent circuit and its applications.

Starting and speed control methods of induction motors: Need for starting – Types of
starters – rotor resistance, star-delta, autotransformer and soft starters, Speed control –
Change of voltage, frequency, number of poles, slip – cascaded connection – slip power
recovery scheme – braking methods.

Total Hours: 60
Text Books:
1 I. J. Nagrath and D. P. Kothari, “Electric Machines”, McGraw Hill Education, 2010.
2 A. E. Fitzgerald and C. Kingsley, "Electric Machinery”, McGraw Hill Education, 2013.
3 P. S. Bimbhra, “Electrical Machinery”, Khanna Publishers, 2011.
Reference Books:
1 P. C. Sen, “Principles of Electric Machines and Power Electronics”, John Wiley & Sons,
Third Edition, 2013.
2 M.G. Say,” Alternating Current Machines”, Pitman Publishing Ltd., 4th edition, 2013.
3 A. S. Langsdorf, “Alternating current machines”, McGraw Hill Education, 2010.
Web Reference:
1 http://nptel.ac.in/syllabus/syllabus.php?subjectId=108105018
2 http://freevideolectures.com/Course/2335/Basic-Electrical-Technology/23
3 https://www.electrical4u.com/deep-bar-double-cage-induction-motor/
4 https://www.youtube.com/watch?v=b24jORRoxEc
5 http://www.engineeringmatters.com/EngineeringMatters_Project_Maglev.pdf

Assessment Methods & Levels (based on Bloom’s Taxonomy)


Formative assessment based on Capstone Model (Max. Marks:20)
Course Outcome Bloom’s Level Assessment Component Marks
C401.1 Remember Technical Quiz 5
C401.2 Understand Writing Skills 5
C401.3 Understand Class Presentation 5
C401.4 Analyze Assignment 5

Summative assessment based on Continuous and End Semester Examination


Continuous Assessment End
Theory Semester
Bloom’s Formative
Term End Examination
Level CIA-I CIA-II Assessment
Examination (Theory)
[10 Marks] [10 Marks] [20 Marks]
[10 Marks] [50 marks]
Remember 50 - 20 25 20
Understand 50 50 40 50 40
Apply 30 20 - 20
Analyse - 20 20 25 20
Evaluate - - - - -
Create - - - - -

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