# Electrical Machines - II

- Institution: IIT Kharagpur
- Department: Electrical Engineering
- Teacher: Prof. Tapas Kumar Bhattacharya
- Level: Undergraduate
- Language: English
- Subjects: Engineering
- Source: [NPTEL](https://nptel.ac.in/courses/108105131)
- Licence: [CC BY-NC-SA](https://nptel.ac.in/faq) (Non-commercial use only.)
- Syllabus: [at the source](https://nptel.ac.in/courses/108105131)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

## Lectures

1. [Lecture 01 : Inductance, Self and Mutual](https://invisiblenetwork.ai/learn/nptel/108105131/dbf34570436d) (Video)
2. [Lecture 02 : Relationship of Inductances in Transformer](https://invisiblenetwork.ai/learn/nptel/108105131/fa76d251c1bb) (Video)
3. [Lecture 03 : Equivalent Circuit from Circuit KVL Equations](https://invisiblenetwork.ai/learn/nptel/108105131/01ad273fd2c0) (Video)
4. [Lecture 04 : Co-efficient of Coupling , Energy Stored in Coupled Coils](https://invisiblenetwork.ai/learn/nptel/108105131/15bb3bd177f9) (Video)
5. [Lecture 05 : A Single Conductor Generator and Motor](https://invisiblenetwork.ai/learn/nptel/108105131/8fe25ffb1b98) (Video)
6. [Lecture 06: Analysis of Single Conductor Generator and Motor](https://invisiblenetwork.ai/learn/nptel/108105131/b68ad7b8bb34) (Video)
7. [Lecture 07: Analysis of Single Conductor Generator and Motor (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/20be6f8a804b) (Video)
8. [Lecture 08: Flux Density Distribution in Space and Nature emf](https://invisiblenetwork.ai/learn/nptel/108105131/52475eb5bf5e) (Video)
9. [Lecture 09: Flux Density Distribution in Space and Nature emf (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/7a8f80afb804) (Video)
10. [Lecture 10: From Linear to Rotating Machine](https://invisiblenetwork.ai/learn/nptel/108105131/571bea16668c) (Video)
11. [Lecture 11 : From Linear to Rotating Machine (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/585517f9198a) (Video)
12. [Lecture 12 : Basic Underlying Principle of Operation of Rotating Machine](https://invisiblenetwork.ai/learn/nptel/108105131/773dff2688c3) (Video)
13. [Lecture 13 : Basic Underlying Principle of Operation of Rotating Machine (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/cde682a9ecf6) (Video)
14. [Lecture 14 : Flux Density Distribution along the Air Gap](https://invisiblenetwork.ai/learn/nptel/108105131/7c346652a152) (Video)
15. [Lecture 15 :Flux Density Distribution along the Air Gap (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/69827cc27702) (Video)
16. [Lecture 16 : Induced Voltage in a Coil in a Rotating Machine](https://invisiblenetwork.ai/learn/nptel/108105131/1d6b763222e4) (Video)
17. [Lecture 17 : Induced Voltage in a Coil in a Rotating Machine (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/a25c6492f368) (Video)
18. [Lecture 18 : Induced Voltage in a Coil in a Rotating Machine (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/b9ff48e4963f) (Video)
19. [Lecture 19 : Induced Voltage due to Fundamental and Harmonic Components of Flux Density Distribution](https://invisiblenetwork.ai/learn/nptel/108105131/c94c7266edbe) (Video)
20. [Lecture 20 : Distributed Coils Connected in Series Resultant Voltage](https://invisiblenetwork.ai/learn/nptel/108105131/b1f10af174b0) (Video)
21. [Lecture 21: Distribution Factor](https://invisiblenetwork.ai/learn/nptel/108105131/cb314bf46d4f) (Video)
22. [Lecture 22: Pitch Factor and Winding Factor](https://invisiblenetwork.ai/learn/nptel/108105131/275f458633ab) (Video)
23. [Lecture 23: How to decide about Short Pitch Angle ϵ](https://invisiblenetwork.ai/learn/nptel/108105131/e4fddec4afd2) (Video)
24. [Lecture 24 : Double Layer 3-phase Winding - An Introduction](https://invisiblenetwork.ai/learn/nptel/108105131/4aacb24d2d3d) (Video)
25. [Lecture 25 : Winding Table for 3-phase Distributed Winding](https://invisiblenetwork.ai/learn/nptel/108105131/60171f61b5a3) (Video)
26. [Lecture 26 : Winding Table for 3-phase Distributed Winding with Examples](https://invisiblenetwork.ai/learn/nptel/108105131/7409918bf6c2) (Video)
27. [Lecture 27 : Winding Table for 3-phase Distributed Winding with Examples (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/1063fb925473) (Video)
28. [Lecture 28 : 120 degree Phase Spread Winding with Examples](https://invisiblenetwork.ai/learn/nptel/108105131/b0bf0f7cb1b1) (Video)
29. [Lecture 29 : Winding Table of 120 degree Phase Spread Coils and Group Connection](https://invisiblenetwork.ai/learn/nptel/108105131/5afd27d3f30a) (Video)
30. [Lecture 30 : Introduction to Rotating Magnetic Field](https://invisiblenetwork.ai/learn/nptel/108105131/218f6dc1b7b8) (Video)
31. [Lecture 31 : Rotating Magnetic Field (Contd.) , Mechanical and Electrical Speed](https://invisiblenetwork.ai/learn/nptel/108105131/527ff11d53b6) (Video)
32. [Lecture 32 : Speed and Direction of Rotating Field](https://invisiblenetwork.ai/learn/nptel/108105131/7eb4900aefd4) (Video)
33. [Lecture 33: Synchronous Speed and How to Calculate Induced Voltage in a Coil](https://invisiblenetwork.ai/learn/nptel/108105131/8c23d80eeb55) (Video)
34. [Lecture 34: Introduction to Induction Motor](https://invisiblenetwork.ai/learn/nptel/108105131/64f62d096d51) (Video)
35. [Lecture 35: Introduction to Induction Motor (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/967fbc4ff5fa) (Video)
36. [Lecture 36: General Expression of Torque in Terms of Stator and Rotor Fields](https://invisiblenetwork.ai/learn/nptel/108105131/1a0231b59fe1) (Video)
37. [Lecture 37: Torque Angle and Torque Expression](https://invisiblenetwork.ai/learn/nptel/108105131/8e8cfafe7087) (Video)
38. [Lecture 38 : How to Fix Up Positions of Net Field, Rotor Field and Stator Field](https://invisiblenetwork.ai/learn/nptel/108105131/4016f53b55b3) (Video)
39. [Lecture 39: Slip: Its Importance and Range for Motor Operation](https://invisiblenetwork.ai/learn/nptel/108105131/474dc89438d3) (Video)
40. [Lecture 40: Equivalent Circuit of 3-Phase Induction Motor](https://invisiblenetwork.ai/learn/nptel/108105131/433408e2001a) (Video)
41. [Lecture 41: Equivalent Circuit of 3-Phase Induction Motor(Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/053e7bb0d963) (Video)
42. [Lecture 42: Equivalent Circuit of 3-Phase Induction Motor (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/f2d7e1c62075) (Video)
43. [Lecture 43: Expression for Electromagnetic Torque in terms of Equivalent Circuit Parameters](https://invisiblenetwork.ai/learn/nptel/108105131/bfc9f462f208) (Video)
44. [Lecture 44: Maximum Electromagnetic Torque and Slip at Which it Occurs](https://invisiblenetwork.ai/learn/nptel/108105131/e7f1a2451ed4) (Video)
45. [Lecture 45 : Typical Torque Slip Characteristic and Operating Point](https://invisiblenetwork.ai/learn/nptel/108105131/b140ef09f4fa) (Video)
46. [Lecture 46: Change in Torque-slip Characteristic as Supply Voltage and Rotor Resistance are Varied](https://invisiblenetwork.ai/learn/nptel/108105131/ca7b96e5e177) (Video)
47. [Lecture 47: Types of Induction Motor - Slip Ring Type](https://invisiblenetwork.ai/learn/nptel/108105131/9d2986b4bef1) (Video)
48. [Lecture 48: Introduction to Cage Induction Motor](https://invisiblenetwork.ai/learn/nptel/108105131/c57c0bf3a760) (Video)
49. [Lecture 49: Cage Motor Can Operate for Different Stator Poles](https://invisiblenetwork.ai/learn/nptel/108105131/68b1f9cf88c0) (Video)
50. [Lecture 50: Core Loss in Induction Motor and Simplified Equivalent Circuit](https://invisiblenetwork.ai/learn/nptel/108105131/c412c73a99f5) (Video)
51. [Lecture 51: Torque Expression from Simplified Equivalent Circuit and Introduction to Circle Diagram](https://invisiblenetwork.ai/learn/nptel/108105131/c75ac0915ad8) (Video)
52. [Lecture 52: Circle Diagram (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/256afb27314d) (Video)
53. [Lecture 53: Exact Power Flow Diagram and Circle Diagram](https://invisiblenetwork.ai/learn/nptel/108105131/3d66bbf9507c) (Video)
54. [Lecture 54: Circle Diagram (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/fecd4fc0ef2f) (Video)
55. [Lecture 55: Circle Diagram: Slip Line](https://invisiblenetwork.ai/learn/nptel/108105131/a16922a973a1) (Video)
56. [Lecture 56: Circle Diagram from Test Data](https://invisiblenetwork.ai/learn/nptel/108105131/0009328614de) (Video)
57. [Lecture 57 : Starting of 3 Phase Induction Motor - Introduction](https://invisiblenetwork.ai/learn/nptel/108105131/6f2a3c152630) (Video)
58. [Lecture 58 : DOL and Reactor Starting](https://invisiblenetwork.ai/learn/nptel/108105131/2df925dad13f) (Video)
59. [Lecture 59 : DOL and Auto Transformer Starting](https://invisiblenetwork.ai/learn/nptel/108105131/6b5299ba94ef) (Video)
60. [Lecture 60 : Introduction to Speed Control](https://invisiblenetwork.ai/learn/nptel/108105131/ef1a63d2e0a0) (Video)
61. [Lecture 61 : Idea of VVVF Speed Control of Induction Motor](https://invisiblenetwork.ai/learn/nptel/108105131/0d6588dfdba9) (Video)
62. [Lecture 62 : Speed Contro Using Two Motors](https://invisiblenetwork.ai/learn/nptel/108105131/c00a5697a426) (Video)
63. [Lecture 63 : Electrical Braking of 3 Phase Induction Motor](https://invisiblenetwork.ai/learn/nptel/108105131/5d42c763ed4c) (Video)
64. [Lecture 64 : Braking (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/381f45a0a651) (Video)
65. [Lecture 65 : Introduction to Single Phase Induction Motor - Sequence Currents](https://invisiblenetwork.ai/learn/nptel/108105131/7f64c2815cbf) (Video)
66. [Lecture 66 : Development of Equivalent Circuit](https://invisiblenetwork.ai/learn/nptel/108105131/ac2f989893ad) (Video)
67. [Lecture 67 : Development of Equivalent Circuit (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/ad338c787b75) (Video)
68. [Lecture 68 : Torque-slip Ch. of 1 ph. I-M Running on Single Winding](https://invisiblenetwork.ai/learn/nptel/108105131/a6f746b15eb2) (Video)
69. [Lecture 69 : Introduction to Starting of 1ph. Induction Motor](https://invisiblenetwork.ai/learn/nptel/108105131/ccfe2c821a03) (Video)
70. [Lecture 70 : Expression for Starting Torque and Need for Phase Splitting](https://invisiblenetwork.ai/learn/nptel/108105131/22228dddb632) (Video)
71. [Lecture 71 : Resistor Split 1 ph. Induction Motor](https://invisiblenetwork.ai/learn/nptel/108105131/9cd6e5a33d9e) (Video)
72. [Lecture 72 : Capacitor Split 1 ph Induction Motor](https://invisiblenetwork.ai/learn/nptel/108105131/4870d69247e0) (Video)
73. [Lecture 73 : Starting of 1 ph. Induction Motor (Contd.)](https://invisiblenetwork.ai/learn/nptel/108105131/3429b0c54882) (Video)
74. [Lecture 74 : Synchronous Machine Construction](https://invisiblenetwork.ai/learn/nptel/108105131/39eedb943d41) (Video)
75. [Lecture 75 : Synchronous Generator - Introduction](https://invisiblenetwork.ai/learn/nptel/108105131/65d9ab7eb163) (Video)
76. [Lecture 76 : Synchronisation](https://invisiblenetwork.ai/learn/nptel/108105131/f3ff64f6e35c) (Video)
77. [Lecture 77 : Expression for Induced Voltage and O.C. Phasor Diagram](https://invisiblenetwork.ai/learn/nptel/108105131/d4691898641a) (Video)
78. [Lecture 78 : Loaded Synchronous Generator - Resultant Field](https://invisiblenetwork.ai/learn/nptel/108105131/333e2bbf90bb) (Video)
79. [Lecture 79: Armature Reaction and Synchronous Reactance. Basic Phasor Diagram](https://invisiblenetwork.ai/learn/nptel/108105131/261dc489d1c9) (Video)
80. [Lecture 80: General Mode of Operation - Rotro Field, Stator Field and Resultant Field](https://invisiblenetwork.ai/learn/nptel/108105131/ed4b39d0d169) (Video)
81. [Lecture 81: Complete Phasor Diagram and Expression for Complex Power](https://invisiblenetwork.ai/learn/nptel/108105131/9b7884f9d3d7) (Video)
82. [Lecture 82: Synchronous Motor Operation, Phasor Diagram and Power Expression](https://invisiblenetwork.ai/learn/nptel/108105131/e26732ca5e07) (Video)
83. [Lecture 83: Effect of Variation of Field Current in Generator](https://invisiblenetwork.ai/learn/nptel/108105131/9bd758e20c3b) (Video)
84. [Lecture 84: Effect of Variation Field Current in Synchronous Motor, Introduction to Salient Pole Machine](https://invisiblenetwork.ai/learn/nptel/108105131/65f207b5195f) (Video)
85. [Lecture 85: Analysis of Salient Pole Synchronous Machine](https://invisiblenetwork.ai/learn/nptel/108105131/c43e67173a18) (Video)
86. [Lecture 86: Phasor Diagram of Salient Pole Synchronous Machine for Generator and Motor Mode](https://invisiblenetwork.ai/learn/nptel/108105131/1f9aada31a14) (Video)
87. [Lecture 87: Expression for Load Angle and Expression for Power](https://invisiblenetwork.ai/learn/nptel/108105131/01c886ed27f5) (Video)
88. [Lecture 88: Phasor Diagrams of Salient Pole Synchronous Generator under Various Conditions](https://invisiblenetwork.ai/learn/nptel/108105131/3c1e4447f30c) (Video)
89. [Lecture 89: Phasor Diagrams of Salient Pole Synchronous Motor under Various Conditions](https://invisiblenetwork.ai/learn/nptel/108105131/abddbf74bc88) (Video)
90. [Lecture 90: O.C and S.C Test on Synchronous Generator](https://invisiblenetwork.ai/learn/nptel/108105131/7b4dc6c8e34b) (Video)
91. [Live Session 21-02-2020](https://invisiblenetwork.ai/learn/nptel/108105131/dbf34570436d-2) (Video)