Fundamental of Power Electronics

By Prof. L Umanand   |   IISc Bangalore
Learners enrolled: 4310
The course introduces basics of power electronic devices and converters. Working principles, operating modes and analysis of AC-DC and DC-DC converters will be covered in detail. A flavour of DC-AC inverter will be introduced at the end of the course. This course uses SPICE simulation as a means for understanding and gaining more insight into the circuits. Control of power electronic converters will be explained. 

INTENDED AUDIENCE  : Undergraduate and post graduate, including research students, with electrical and electronics engg. background would benefit from the course. Those with background in energy science and engineering and system and control disciplines may also benefit. Industry professionals and researchers in R&D stream will also benefit.
PREREQUISITES : Electrical and electronic circuits, network theory and basics of semiconductor physics.
INDUSTRY SUPPORT : All industries directly or indirectly using power electronics technology may find the course relevant.
Course Status : Completed
Course Type : Elective
Duration : 12 weeks
Category :
  • Electrical, Electronics and Communications Engineering
  • Power Systems and Power Electronics
Credit Points : 3
Level : Undergraduate/Postgraduate
Start Date : 24 Jan 2022
End Date : 15 Apr 2022
Enrollment Ends : 07 Feb 2022
Exam Date : 24 Apr 2022 IST

Note: This exam date is subjected to change based on seat availability. You can check final exam date on your hall ticket.

Page Visits

Course layout

Week 1 : Ideal switch, diode static characteristics, diode dynamic characteristics, reading the diode datasheet, thermal dissipation, heatsink design, diac and triac.
Week 2 : Bipolar junction transistor - operation, static and dynamic characteristics, loss calculation, safe operation area, reading the datasheet, parallel operation, darlington connection.
Week 3 : MOSFETs and IGBTs - operation, static and dynamic characteristics of MOSFET and IGBT, parallel operation, loss calculation and simulation.
Week 4 : Rectifier - Capacitor filter, circuit operation and waveforms, designing the circuit, setting up for simulation in ngSpice, simulation of circuit.
Week 5 : Inrush current limiting in rectifier-capacitor filter circuits, resistor solution, thermistor solution, transformer solution, MOSFET solution, relay and contactor solution, power factor concepts and measurement of power factor for rectifier capcitor filter circuit.
Week 6 : Linear DC -DC converter or linear regulators, shunt regulator, operation, design and applications, series regulator, operation and design, improvement solutions, datasheet study.
Week 7 : DC-DC switched mode converters : Buck, Boost and buck-boost converters, operation, waveforms, equations and simulation in ngSpice.
Week 8 :  Forward converter operation, waveforms, core resetting methods, simulation in ngSpice, Inductor deisgn by area product approach, Flyback converter, operation and waveforms.
Week 9 : Magnetics design, permeance, inductor value and energy storage, inductor design, transformer design area product approach, 
Week 10 : Push pull, half bridge and full bridge circuits, operation and waveforms, simulation example
Week 11 : Drive circuits, BJT drive requirements, drive circuit non-isolated, drive circuits isolated, MOSFET drive requirements, drive circuit non-isolated and isolated, series snubber, shunt snubber.
Week 12 : Close loop control, current control, slope compensation for current control, single phase inverter with sinusoidal PWM, simulation example

Books and references

1. John G. Kassakian, Martin F. Schlecht and George C. Verghese, "Principles of Power Electronics," Pearson, 2010.
2. P. Wood, Switching Power Converters, New York: Van Nostrand Reinhold Inc., 1981.
3. Ned Mohan, T. Undeland, and W. Riobbins, “Power Electronics: Converters, Applications and Design,” Wiley-India, 2011.
4. J. W. Motto, “Introduction to solid state power electronics” POWEREX Semiconductor Division, 1977.
5. R.W. Erickson and D. Maksimovic, “Fundamentals of Power Electronics”, Springer, 2001.
6. S. B. Dewan and A. Straughen, "Power Semiconductor Circuits", Wiley, 1975.
7. J. Vithayathil, "Power Electronics: Principles and Application", McGraw-Hill Series, International Edition, 1995.
8. A. S. Sedra and K. C. Smith, "Microelectronic Circuits", Oxford University Press, Fifth Edition, 1998.   

Instructor bio

Prof. L Umanand

IISc Bangalore
L. Umanand is a faculty at the Department of Electronics System Engineering (DESE) of Indian Institute of Science, Bangalore. He has been teaching, guiding and consulting in power electronic converters for more than two decades. His area of research are in power conversion, renewable energy systems and modelling.

Course certificate

The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.
The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).
Date and Time of Exams: 24 April 2022 Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.
Registration url: Announcements will be made when the registration form is open for registrations.
The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.
Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.


Average assignment score = 25% of average of best 8 assignments out of the total 12 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IISc Bangalore.It will be e-verifiable at nptel.ac.in/noc.

Only the e-certificate will be made available. Hard copies will not be dispatched.

Once again, thanks for your interest in our online courses and certification. Happy learning.

- NPTEL team

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