Electrical Machines - I

Electrical Machines

Preview

18 min

Lecture 01: Magnetic Circuit and Transformer

Lecture 02: Magnetising Current from B-H Curve

Lecture 03: Ideal Transformer, Dot Convention and Phasor Diagram

Lecture 04: Operation of Ideal Operation with Load Connected

Lecture 05: Equivalent Circuit of Ideal Transformer

Lecture 06: Rating of Single Phase Transformer: Rated Current and Rated Voltage with Example

Lecture 07: Transformer with Multiple Coils

Lecture 08: Modelling of Practical Transformer - I

Lecture 09: Modelling of Practical Transformer - II

Lecture 10: Modelling of Practical Transformer - III

Lecture 11: Core Loss - Eddy Current Loss

Lecture 12: Factors on Eddy Current Loss Depends

Lecture 13: Hysteresis Loss

Lecture 14: Exact Equivalent Circuit

Lecture 15: Approximate Equivalent Circuit

Lecture 16: Determination of Equivalent Circuit Parameters - No Load Test

Lecture 17: Short Circuit Test

Lecture 18: Choosing Sides to Carry Out O.C / S.C Test

Lecture 19: Efficiency of Transformer - Losses

Lecture 20: Efficiency (Contd.)

Lecture 21: Condition for Maximum Efficiency When Load Power Factor Constant

Lecture 22: Family of Efficiency Curve at Various Power Factor and Energy Efficiency

Lecture 23: Load Description and Energy Efficiency

Lecture 24: Regulation: its Expression

Lecture 25: Regulation: its Expression (Contd.)

Lecture 26: Auto Transformer - Introduction

Lecture 27: AutoTransformer versus Two Winding Transformer

Lecture 28: AutoTransformer versus Two Winding Transformer (Contd.)

Lecture 29: Numerical Problems on Ideal Auto Transformer

Lecture 30: Two Winding Transformer Connected as Auto Transformer

Lecture 31: Practical Auto Transformer

Lecture 32 : Equivalent Circuit of an Auto Transformer

Lecture 33: Polarity Test and Sumpner Test

lecture 34: 3 Phase Transformer Using 3 Single Phase Transformer

Lecture 35: Various Connections of 3-Phase Transformer - I

Lecture 36: Various Connections of 3-Phase Transformer - II

Lecture 37: Vector Group of 3-Phase Transformer

Lecture 38 : Vector Group (Contd.)

Lecture 39: Open Delta Connection

Lecture 40: 3-Phase Core Type and Shell Type Transformer

Lecture 41: Zig Zag Connection

Lecture 42: Effect 3rd Harmonic Exciting Current and Flux

Lecture 43: Choosing Transformer Connection

Lecture 44: Choosing Transformer Connection (Contd.)

Lecture 45: Phase Conversion using Transformer: Scott Connection

Lecture 46: Scott Connection (Contd.)

Lecture 47: 3 Phase to 6 Phase Conversion O.C / S.C Test on 3 Phase Transformer

Lecture 48: Parallel Operation of Transformers - I

Lecture 49: Parallel Operation of Transformers - II

Lecture 50: Parallel Operation of Transformers - III

Lecture -51 mod06

Lecture 52: Cooling of Transformer and Fillings of Transformer

Lecture 53: Output Equation of 3- Phase Transformer

Lecture 54

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Lecture 65

Lecture 66 - mod08

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Lecture 70 - mod08

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Lecture 74 - mod09

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Lecture 79 - mod10

Lecture 80 - mod10

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Lecture 82 - mod10

Lecture 83: Field Control (Contd.)

Lecture 84: D.C Motor Braking

Lecture 85: Introduction to Series Motor

Lecture 86

Lecture 87: Series Motor Speed Control

Lecture 88

Lecture 89

Lecture 90

Lecture 91

Lecture 92

Lecture 93

Lecture 94: Wave Winding (Contd.)