IIT Delhi offers Free Online Course on Electrical Machines via NPTEL

IIT Delhi offers this course to introduce electrical machines or transformers, DC and AC rotating machines. It says that these are the most important components of energy and power conversion industry. The 12-week course states, ""Transformers, being static, are the easiest of electrical machines. Hence, the course will deal with it initially after introducing magnetic circuit fundamentals. DC and AC machines will be discussed after understanding the process of electromechanical energy conversion through a magnetic field. The efficiency, voltage regulation and characteristics of these machines will be discussed while they are functioning as generators. Further, their speed-torque characteristics, starting, braking, speed control and efficiency will be discussed while they function as motors. Every topic will include their applications in various power industries as well."

Who can enrol in the course?

This is an Undergraduate Electric Engineering level course. But anyone can enrol in the course. The only prerequisite is you should know Basic Electrical Engineering, Circuit theory. You also should have the desire to expand the horizon of your knowledge. Moreover, this course is a must-take as Machines manufacturing and drives manufacturing industries like Kirloskar, ABB and Siemens need the same.

Timeline of the course

This Elective course has a duration of 12 weeks. It will start from 18 January 2021 and end on 09 April 2021. If you want the certificate, you have to give a proctored exam on 25 April 2021. The last date to enrol is 25 January 2020.

Who will teach this DBMS course?

Prof. Bhuvaneshwari will lead the course. She has been working as a faculty member in the Department of Electrical Engineering IIT Delhi since 1997. First, she did her BE from College of Engineering, Guindy, Anna University and then completed her M.Tech and PhD from IIT Madras in 1987 and 1992 respectively. She worked as a lecturer in College of Engineering, Madras after which she was working for the electric utility company ComEd in Chicago, IL, USA before joining as a faculty member in IIT Delhi. She has more than 150 international and National journal and conference papers to her credit. A Fellow of IEEE-USA, IETUK, IETE, IE(I), she is also a life member of ISTE. Her areas of interest are power electronics, electrical machines, drives, power quality, power conditioning and renewable energy.

What will the course teach?

This is a 12-week-long course. Here’s the itinerary for the course.

W1: Introduction to Electrical machines, Review of single-phase and three-phase circuits, complex notation, power and power factor

W2: Magnetic circuits and flux calculations: MMF, Flux, permeability, reluctance, Ferromagnetic materials, BH loop, hysteresis, Eddy current losses

W3: Assignment No 1 and 2 on AC circuits & Magnetic Circuits

W4: Transformers: Principle of operation, ideal and practical transformer, efficiency and voltage regulation, Open circuit, short circuit

and Load tests. Auto-transformer and instrument transformers. Parallel operation. Three-phase transformer fundamentals.

W5: Assignment No. 3 and 4 on single-phase and three-phase transformers

W6: Electromagnetic energy conversion principles: Filed energy, co-energy, Torque & power calculations, singly excited and doubly excited machines.

W7: DC machines: Generators and motors; Construction, Different types of DC machines, principle of operation, torque and emf equation, Characteristics of DC generators and motors, Starting Braking and Speed control of DC Motors.

W8: 3-phase induction machines: Construction, Different types of rotors, principle of operation, revolving magnetic field theory, equivalent circuit, Torque expression,3 Torque-speed Characteristics of induction motors, Starting Braking and Speed control.

W9: Single-phase induction motor: Types, Construction, Principle of operation, equivalent circuit, Torque-speed characteristics

W10: Assignment No. 6 & 7 Problems on DC Generators and motors

W11: Single-phase induction motor: Types, Construction, Principle of operation, equivalent circuit, Torque-speed characteristics

W12: Three-phase Synchronous Machines: Construction, Different types, principle of operation, EMF equation, winding factor, OCC, SCC and calculation of synchronous reactance, Equivalent circuit, Voltage regulation and efficiency, Motoring operation, Power and Torque expressions, PF control, V and inverted V Characteristics of synchronous motors, Starting Braking and speed control.

How to obtain a certificate from IIT Delhi?

The course is free to enrol and learn. But if you want a certificate, you have to register and write the optional proctored exam. The fee for this exam is ₹ 1000. Also, the successful completion of the exam does not guarantee a certificate. To get a certificate, you need to get 25% from the assignments and 75% of the proctored certification exam score out of 100.

Final score = Average assignment score (>10/25) + Exam score (>30/75). If one of the 2 criteria is not met, you will still not get the certificate even if the Final score > 40/100.

This printable certificate will carry the stamp from both NPTEL and IIT Delhi. Further, you can enrol in the course here.