Know More and Further Reading
Course Outcomes:
At the end of this course, students will demonstrate the ability to
• Understand the concepts of rotating magnetic fields.
• Understand the operation of ac machines.
• Analyse performance characteristics of ac machines.
Course Contents: (as per the AICTE Model Curriculum)
Module 1: Fundamentals of AC machine windings (8 Hours)
At the end of this course, students will demonstrate the ability to
• Understand the concepts of rotating magnetic fields.
• Understand the operation of ac machines.
• Analyse performance characteristics of ac machines.
Course Contents: (as per the AICTE Model Curriculum)
Module 1: Fundamentals of AC machine windings (8 Hours)
- Physical arrangement of windings in stator and cylindrical rotor; slots for windings; single-turn coil - active portion and overhang; full-pitch coils, concentrated winding, distributed winding, winding axis, 3D visualization of the above winding types, Air-gap MMF distribution with fixed current through winding-concentrated and distributed, Sinusoidally distributed winding, winding distribution factor
- Constant magnetic field, pulsating magnetic field - alternating current in windings with spatial displacement, Magnetic field produced by a single winding - fixed current and alternating current Pulsating fields produced by spatially displaced windings, Windings spatially shifted by 90 degrees, Addition of pulsating magnetic fields, Three windings spatially shifted by 120 degrees (carrying three-phase balanced currents), revolving magnetic field.
- Construction, Types (squirrel cage and slip-ring), Torque Slip Characteristics, Starting and Maximum Torque. Equivalent circuit. Phasor Diagram, Losses and Efficiency. Effect of parameter variation on torque speed characteristics (variation of rotor and stator resistances, stator voltage, frequency). Methods of starting, braking and speed control for induction motors. Generator operation. Self -excitation. Doubly-Fed Induction Machines.
- Constructional features, double revolving field theory, equivalent circuit, determination of parameters. Split-phase starting methods and applications
- Constructional features, cylindrical rotor synchronous machine - generated EMF, equivalent circuit and phasor diagram, armature reaction, synchronous impedance, voltage regulation. Operating characteristics of synchronous machines, V-curves. Salient pole machine - two reaction theory, analysis of phasor diagram, power angle characteristics. Parallel operation of alternators - synchronization and load division.
Course Textbook/Reference Material
- A. E. Fitzgerald and C. Kingsley, "Electric Machinery”, McGraw Hill Education, 2013.
- M. G. Say, “Performance and design of AC machines”, CBS Publishers, 2002.
- P. S. Bimbhra, “Electrical Machinery”, Khanna Publishers, 2011.
- I. J. Nagrath and D. P. Kothari, “Electric Machines”, McGraw Hill Education, 2010.
- A. S. Langsdorf, “Alternating current machines”, McGraw Hill Education, 1984.
- P. C. Sen, “Principles of Electric Machines and Power Electronics”, John Wiley & Sons, 2007.
Further Reading: Interesting Material and Links
1. Rotating mmf of Ideal Three-Phase Sinusoidally Distributed 2-Pole Winding with Sinusoidal ExcitationDr. Bingsen Wang, 4/15/2023
Python code for animation
https://colab.research.google.com/drive/1gBmcpS74DG3Sxyr34gyAF0-Ca4S1fUB5?usp=sharing
chapter-0_course_contents.pdf | |
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Lecture Video: Chapter 0
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Chapter 1: High Voltage Engineering: Course Introduction
This lecture covers the course introduction, high voltage in electric power system, importance of HV insulation design and testing, etc.
This lecture covers the course introduction, high voltage in electric power system, importance of HV insulation design and testing, etc.
chapter-1.pdf | |
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Lecture Video: Chapter 1 (Part 1)
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Lecture Video: Chapter 1 (Part 2)
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Chapter 2: Electric Field Intensity, Stress Control, and Types of Breakdown in Dielectrics
This lecture covers the classification of electric fields, phenomenon of breakdown and partial breakdown, electric strength of dielectrics and stress control techniques.
This lecture covers the classification of electric fields, phenomenon of breakdown and partial breakdown, electric strength of dielectrics and stress control techniques.
chapter-2.pdf | |
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Lecture Video: Chapter 2 (Part 2)
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Chapter 3: Transient Overvoltages and Insulation Coordination in High-Voltage Networks
This lecture covers the Types of overvoltages, their cause, and source, standard shapes of transient overvoltages, mechanisms of the production of overvoltages, transient overvoltage protection, System ‘Basic Insulation Level’ (BIL) and principles of insulation coordination design.
This lecture covers the Types of overvoltages, their cause, and source, standard shapes of transient overvoltages, mechanisms of the production of overvoltages, transient overvoltage protection, System ‘Basic Insulation Level’ (BIL) and principles of insulation coordination design.
chapter-3.pdf | |
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Lecture Video: Chapter 3 (Part 2)
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Chapter 4: Field-Dependent Electric Strength and Breakdown in Gaseous Dielectric and Vacuum
These lectures cover the Properties of gaseous dielectrics, mechanism of the generation of charge carriers, development of Electron Avalanche, Townsend’s current growth equation, breakdown mechanism in uniform, weakly nonuniform, and extremely nonuniform fields.
These lectures cover the Properties of gaseous dielectrics, mechanism of the generation of charge carriers, development of Electron Avalanche, Townsend’s current growth equation, breakdown mechanism in uniform, weakly nonuniform, and extremely nonuniform fields.
chapter-4.pdf | |
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Lecture Video: Chapter 4 (Part 2)
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Lecture Video: Chapter 4 (Part 3)
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Lecture Video: Chapter 4 (Part 4)
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Lecture Video: Chapter 4 (Part 5)
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Lecture Video: Chapter 4 (Part 6)
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Lecture Video: Chapter 4 (Part 7)
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Chapter 5: Lightning, a Breakdown Phenomenon in Atmospheric Air, Its Effects and Protection
These lectures cover the development of breakdown phenomenon in extremely long gap air, deleterious effects of lightning, protection of living beings and structure from lightning, the rare phenomenon of ball lightning and prevention/protection from ball lightning.
These lectures cover the development of breakdown phenomenon in extremely long gap air, deleterious effects of lightning, protection of living beings and structure from lightning, the rare phenomenon of ball lightning and prevention/protection from ball lightning.
chapter-5.pdf | |
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Lecture Video: Chapter 5 (Part 2)
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Lecture Video: Chapter 5 (Part 3)
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Chapter 6: Solid- and Liquid-Insulating Materials, Their Classification, Properties and Breakdown
These lectures cover the Classification of solid and liquid dielectrics, dielectric properties of insulating solids and liquids, pre-breakdown phenomenon in solid and liquid insulating materials and partial Breakdown, PB in solid and liquid dielectrics
These lectures cover the Classification of solid and liquid dielectrics, dielectric properties of insulating solids and liquids, pre-breakdown phenomenon in solid and liquid insulating materials and partial Breakdown, PB in solid and liquid dielectrics
chapter-6.pdf | |
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Lecture Video: Chapter 6 (Part 1)
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Lecture Video: Chapter 6 (Part 2)
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Lecture Video: Chapter 6 (Part 3)
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Lecture Video: Chapter 6 (Part 4)
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Lecture Video: Chapter 6 (Part 5)
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Lecture Video: Chapter 6 (Part 6)
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Lecture Video: Chapter 6 (Part 7)
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Chapter 7: Generation of High Test Voltages
These lectures cover the design features of high voltage ac test equipment, tuned resonant test set, generation of high dc voltages and high impulse test voltage generation
These lectures cover the design features of high voltage ac test equipment, tuned resonant test set, generation of high dc voltages and high impulse test voltage generation
chapter-7.pdf | |
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Lecture Video: Chapter 7 (Part 1)
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Lecture Video: Chapter 7 (Part 2)
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Lecture Video: Chapter 7 (Part 3)
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Lecture Video: Chapter 7 (Part 4)
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Lecture Video: Chapter 7 (Part 5)
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Lecture Video: Chapter 7 (Part 6)
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Chapter 8: Measurement of High Test Voltages
These lectures cover the principles and types of voltage dividers, Methods of peak voltage measurement, Voltage measurement with Sphere-gap and principle, construction and operation of electrostatic voltmeters
These lectures cover the principles and types of voltage dividers, Methods of peak voltage measurement, Voltage measurement with Sphere-gap and principle, construction and operation of electrostatic voltmeters
chapter-8.pdf | |
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Lecture Video: Chapter 8 (Part 1)
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Lecture Video: Chapter 8 (Part 2)
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Lecture Video: Chapter 8 (Part 3)
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Lecture Video: Chapter 8 (Part 4)
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Chapter 9: Non-Destructive Testing and Quality Control of Electrical Equipment
These lectures cover the High voltage withstand tests of insulation, quality of finish of equipment insulation, partial breakdown measurement techniques and recommended procedures of high voltage testing of electrical apparatus.
These lectures cover the High voltage withstand tests of insulation, quality of finish of equipment insulation, partial breakdown measurement techniques and recommended procedures of high voltage testing of electrical apparatus.
chapter-9.pdf | |
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Lecture Video: Chapter 9 (Part 1)
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Lecture Video: Chapter 9 (Part 2)
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Lecture Video: Chapter 9 (Part 3)
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Chapter 10: High-Voltage Test Laboratory and Curriculum Experiments
These lectures cover the application of high voltage laboratories, test equipment requirement in a HV laboratory, basic layout guidelines for HV laboratories, high voltage laboratories in the world and experimental work for students as curriculum.
These lectures cover the application of high voltage laboratories, test equipment requirement in a HV laboratory, basic layout guidelines for HV laboratories, high voltage laboratories in the world and experimental work for students as curriculum.
chapter-10.pdf | |
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Tutorial Sessions:
These lectures covers the few real-world problems and numerical.
These lectures covers the few real-world problems and numerical.
numericals_examples.pdf | |
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Numerical Session 1
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Numerical Session 2
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Numerical Session 3
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Numerical Session 4
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Numerical Session 5
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