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Electrical Machines I

Electrical Machines I. Instructor: Dr. Debaprasad Kastha, Department of Electrical Engineering, IIT Kharagpur. Electrical machines are basically electromechanical energy conversion devices which convert electrical energy to mechanical energy and vice versa. There are different types of electrical machines that are used, although their basic operating principles are somewhat similar, they are very different from their point of view of construction and usage. This course will talk about two types of electrical machines, namely the transformer and the dc machine. (from nptel.ac.in)

Lecture 12 - Three Phase Transformer Connections


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Lecture 01 - Introduction
Lecture 02 - Operating Principles and Construction of Single Phase Transformers
Lecture 03 - Modeling of Single Phase Transformers
Lecture 04 - Equivalent Circuits of Single Phase Transformers
Lecture 05 - Testing of Single Phase Transformers
Lecture 06 - Efficiency of Single Phase Transformers
Lecture 07 - Voltage Regulation of Single Phase Transformers
Lecture 08 - Parallel Operation of Single Phase Transformers
Lecture 09 - Harmonics and Switching Transients in Single Phase Transformers
Lecture 10 - Introduction to Three Phase Transformers
Lecture 11 - Construction of Three Phase Transformers
Lecture 12 - Three Phase Transformer Connections
Lecture 13 - Three Phase Transformer Phase Groups Part I
Lecture 14 - Three Phase Transformer Phase Groups Part II
Lecture 15 - Analysis and Testing of Three Phase Transformers
Lecture 16 - Operation of Three Phase Transformers
Lecture 17 - Auto Transformers
Lecture 18 - Three Winding Transformers
Lecture 19 - Scott Connected Transformers
Lecture 20 - Potential and Current Transformers
Lecture 21 - Operating Principles of DC Machines
Lecture 22 - Constructional Features of DC Machines
Lecture 23 - Generated EMF and Torque in DC Machines
Lecture 24 - Armature Reaction
Lecture 25 - Commutation in DC Machines
Lecture 26 - Separately Excited DC Generators
Lecture 27 - DC Shunt Generators
Lecture 28 - Compound DC Generators
Lecture 29 - Interconnected DC Generators
Lecture 30 - Characteristics of DC Shunt Motors
Lecture 31 - Starting of DC Shunt Motors
Lecture 32 - Speed Control of DC Shunt Motors
Lecture 33 - Braking of DC Shunt Motors
Lecture 34 - Electronic Control of DC Shunt Motors
Lecture 35 - Testing of DC Shunt Motors
Lecture 36 - Characteristics of DC Series Motors
Lecture 37 - Starting and Braking of DC Series Motors
Lecture 38 - Speed Control of DC Series Motors
Lecture 39 - Testing of DC Series Motors
Lecture 40 - Characteristics of Compound DC Series Motors