NOC:Electrical Machines-II


Lecture 1 - Inductance, Self and Mutual


Lecture 2 - Relationship of Inductances in Transformer


Lecture 3 - Equivalent Circuit from Circuit KVL Equations


Lecture 4 - Co-efficient of Coupling , Energy Stored in Coupled Coils


Lecture 5 - A Single Conductor Generator and Motor


Lecture 6 - Analysis of Single Conductor Generator and Motor


Lecture 7 - Analysis of Single Conductor Generator and Motor (Continued...)


Lecture 8 - Flux Density Distribution in Space and Nature emf


Lecture 9 - Flux Density Distribution in Space and Nature emf (Continued...)


Lecture 10 - From Linear to Rotating Machine


Lecture 11 - From Linear to Rotating Machine (Continued...)


Lecture 12 - Basic Underlying Principle of Operation of Rotating Machine


Lecture 13 - Basic Underlying Principle of Operation of Rotating Machine (Continued...)


Lecture 14 - Flux Density Distribution along the Air Gap


Lecture 15 - Flux Density Distribution along the Air Gap (Continued...)


Lecture 16 - Induced Voltage in a Coil in a Rotating Machine


Lecture 17 - Induced Voltage in a Coil in a Rotating Machine (Continued...)


Lecture 18 - Induced Voltage in a Coil in a Rotating Machine (Continued...)


Lecture 19 - Induced Voltage due to Fundamental and Harmonic Components of Flux Density Distribution


Lecture 20 - Distributed Coils Connected in Series Resultant Voltage


Lecture 21 - Distribution Factor


Lecture 22 - Pitch Factor and Winding Factor


Lecture 23 - How to decide about Short Pitch Angle ϵ


Lecture 24 - Double Layer 3-phase Winding - An Introduction


Lecture 25 - Winding Table for 3-phase Distributed Winding


Lecture 26 - Winding Table for 3-phase Distributed Winding with Examples


Lecture 27 - Winding Table for 3-phase Distributed Winding with Examples (Continued...)


Lecture 28 - 120 degree Phase Spread Winding with Examples


Lecture 29 - Winding Table of 120 degree Phase Spread Coils and Group Connection


Lecture 30 - Introduction to Rotating Magnetic Field


Lecture 31 - Rotating Magnetic Field (Continued...), Mechanical and Electrical Speed


Lecture 32 - Speed and Direction of Rotating Field


Lecture 33 - Synchronous Speed and How to Calculate Induced Voltage in a Coil


Lecture 34 - Introduction to Induction Motor


Lecture 35 - Introduction to Induction Motor (Continued...)


Lecture 36 - General Expression of Torque in Terms of Stator and Rotor Fields


Lecture 37 - Torque Angle and Torque Expression


Lecture 38 - How to Fix Up Positions of Net Field, Rotor Field and Stator Field


Lecture 39 - Slip: Its Importance and Range for Motor Operation


Lecture 40 - Equivalent Circuit of 3-Phase Induction Motor


Lecture 41 - Equivalent Circuit of 3-Phase Induction Motor (Continued...)


Lecture 42 - Equivalent Circuit of 3-Phase Induction Motor (Continued...)


Lecture 43 - Expression for Electromagnetic Torque in terms of Equivalent Circuit Parameters


Lecture 44 - Maximum Electromagnetic Torque and Slip at Which it Occurs


Lecture 45 - Typical Torque Slip Characteristic and Operating Point


Lecture 46 - Change in Torque-slip Characteristic as Supply Voltage and Rotor Resistance are Varied


Lecture 47 - Types of Induction Motor - Slip Ring Type


Lecture 48 - Introduction to Cage Induction Motor


Lecture 49 - Cage Motor Can Operate for Different Stator Poles


Lecture 50 - Core Loss in Induction Motor and Simplified Equivalent Circuit


Lecture 51 - Torque Expression from Simplified Equivalent Circuit and Introduction to Circle Diagram


Lecture 52 - Circle Diagram (Continued...)


Lecture 53 - Exact Power Flow Diagram and Circle Diagram


Lecture 54 - Circle Diagram (Continued...)


Lecture 55 - Circle Diagram: Slip Line


Lecture 56 - Circle Diagram from Test Data


Lecture 57 - Starting of 3 Phase Induction Motor - Introduction


Lecture 58 - DOL and Reactor Starting


Lecture 59 - DOL and Auto Transformer Starting


Lecture 60 - Introduction to Speed Control


Lecture 61 - Idea of VVVF Speed Control of Induction Motor


Lecture 62 - Speed Contro Using Two Motors


Lecture 63 - Electrical Braking of 3 Phase Induction Motor


Lecture 64 - Braking (Continued...)


Lecture 65 - Introduction to Single Phase Induction Motor - Sequence Currents


Lecture 66 - Development of Equivalent Circuit


Lecture 67 - Development of Equivalent Circuit (Continued...)


Lecture 68 - Torque-slip Ch. of 1 ph. I-M Running on Single Winding


Lecture 69 - Introduction to Starting of 1ph. Induction Motor


Lecture 70 - Expression for Starting Torque and Need for Phase Splitting


Lecture 71 - Resistor Split 1 ph. Induction Motor


Lecture 72 - Capacitor Split 1 ph Induction Motor


Lecture 73 - Starting of 1 ph. Induction Motor (Continued...)


Lecture 74 - Synchronous Machine Construction


Lecture 75 - Synchronous Generator - Introduction


Lecture 76 - Synchronisation


Lecture 77 - Expression for Induced Voltage and O.C. Phasor Diagram


Lecture 78 - Loaded Synchronous Generator - Resultant Field


Lecture 79 - Armature Reaction and Synchronous Reactance. Basic Phasor Diagram


Lecture 80 - General Mode of Operation - Rotro Field, Stator Field and Resultant Field


Lecture 81 - Complete Phasor Diagram and Expression for Complex Power


Lecture 82 - Synchronous Motor Operation, Phasor Diagram and Power Expression


Lecture 83 - Effect of Variation of Field Current in Generator


Lecture 84 - Effect of Variation Field Current in Synchronous Motor, Introduction to Salient Pole Machine


Lecture 85 - Analysis of Salient Pole Synchronous Machine


Lecture 86 - Phasor Diagram of Salient Pole Synchronous Machine for Generator and Motor Mode


Lecture 87 - Expression for Load Angle and Expression for Power


Lecture 88 - Phasor Diagrams of Salient Pole Synchronous Generator under Various Conditions


Lecture 89 - Phasor Diagrams of Salient Pole Synchronous Motor under Various Conditions


Lecture 90 - O.C and S.C Test on Synchronous Generator