Course Objectives:

1.      To impart knowledge about the physics of device operation, static and dynamic characteristics, ratings, protection, operating limitations and safe operating area

2.      To discuss the design issues of drive circuits and their usage

3.      To Learn about the relative merits and demerits of the different PWM schemes

4.      To discuss the different types of inverters and cyclo-converters and their analysis with R, RL, RLE type of loads

5.      To explain different types of DC-DC converters and resonant inverters

Introduction: Power Flow Control by Switches, Attributes of a Practical Switch, Physics of device operation, static/ dynamic switching characteristics, ratings, protection, operating limitations and safe operating area.


Gate and Drive Circuits: Design Consideration, De-coupled drive circuits, electrically isolated driver circuits, Cascade connected drive circuits, Protection in drive circuits, Heat sink Design


PWM Inverter Modulation Strategies: Single and multiple PWM, Sinusoidal PWM (SPWM), Modified SPWM, Space vector modulation and hysteresis band current control PWM techniques. Line frequency inductor design, High frequency transformer design for power converters.


Power Converters: H-bridge configuration of converter, 1200/1800 mode of operation of three phase inverters, three phase Step wave inverter circuits, three phase PWM controlled inverter circuits, Multilevel inverter, Matrix converters, Phase Controlled and Envelope Cyclo-converters.


DC-DC Converter: Buck Converter, Boost Converter, Buck-Boost Converter; Switch Mode Converter Power Supplies: Push-Pull Converter, Full-Bridge Converter, Forward Converter, Fly-back Converter; Resonant DC-DC converters: Basic circuit concepts, Analysis  and design of Series Resonant Converter (SRC), Parallel Resonant Converter (PRC)  and Series-Parallel Resonant Converter (SPRC) Circuits, PWM resonant converters: Zero-Voltage and Zero-Current Resonant Converter, reduction in THD and power factor improvement, Industrial applications


Laboratory Work: Device characteristics, Gate Drive Circuits, PWM signal Generation, DC-DC Converter, Three phase full converter, Voltage Source Inverter, Half and Full wave Cyclo-converter, Simulation of Power Converters and harmonic analysis.


Minor Project:  Harmonic analysis of power converters with continuous and discontinuous operating modes, Investigation of performance of power converters with PWM firing scheme




Course Learning Outcomes (CLO):

On the completion of the course, the student will be able

1.      To identify the power semiconductor devices and its utilisation

2.       To design the   Gate and base drive circuits

3.      To develop skills to utilize the different PWM schemes

4.      To validate the performance of different types of power converters

5.      To select the power converter for variety of applications

Recommended Books:

1.             Mohan, N., Undeland, T.M.  and Robbins, W. P., Power Electronics: Converter Applications and Design, John Wiley and Sons (2007). 

2.             Rashid, M.H., Power Electronics Circuits, Devices and Applications, Prentice-Hall of India Private Limited (2006).

3.             Sen, P.C., Power Electronics, Tata McGraw-Hill Publishing Company (1996).

4.             Philip T. Krein, Elements of Power Electronics, Oxford university Press (2008)

5.             Bose B.K., Power Electronics & AC Drives, Prentice Hall Englewood cliffs, NJ, (1986)