Course

Unit 1

Power Semiconductor Devices: Power diodes, Thyristors, BJT, Power MOSFET, IGBT -Structure, turn ON and turn OFF operation, steady state and switching characteristics. Introduction to wide band gap power semiconductor devices, Comparison and selection of controllable switches – Introduction to driver circuits – Power loss in switching devices, Temperature rise and heat sink.

Unit 2

Phase Controlled Converters: Single phase and Three phase Converters in CCM – performance parameters, DCM operation, Analysis of Single-phase converter with different loads – Non-Sinusoidal Analysis. Inverter mode of operation – Effect of Source Inductance. Single-phase AC Voltage Controllers with different loads – Thyristor Controlled Reactor. Choppers: Step down and step up choppers – Steady state operation – CCM. Applications of choppers – power factor correction.

Unit 3

Inverters: Single phase half bridge and full bridge inverter, Inverter control – square wave, sine PWM – Unipolar and Bipolar voltage    switching, performance parameters, AC and DC side current. Three phase inverters – sine PWM. Rectifier mode of operation – AC side filter – Applications.

Learning Objectives

LO1:  Understand the characteristics, operation, and selection criteria of power semiconductor
devices, including wide bandgap devices.

LO2: Learn the principles and performance analysis of phase-controlled converters and
choppers under various load conditions.

LO3: Analyze single-phase and three-phase inverters and their control strategies such as sine
PWM and square wave.

LO4: Explore practical aspects of power electronic systems including losses, heat dissipation,
filtering, and power quality.

Course Outcomes:

CO1: Understand the static and dynamic characteristics of power semiconductor devices and
various power electronic converters.

CO2: Analyze the behaviour of converters and their control under different modes of operation.

CO3: Design different converter circuits under different operating modes.

CO4: Evaluate the performance of power converters for various applications.

CO-PO Mapping

Textbooks

1. Ned Mohan, Tore M. Underland and William P. Robbins, “Power Electronics: Converters, Applications and Design”, Third Edition, John Wiley & Sons, 2007.
2. Erickson, Maksimovic, and Dragan “Fundamentals of Power Electronics”, Kluwer academic publishers, 2020.

References:

1. L. Umanand, “Power Electronics: Essentials and Applications”, Wiley India, 2009.
2. Joseph Vithayathil “Power Electronics” Tata McGraw Hill, 2010.
3. Muhammed H Rashid, “Power Electronics- circuits, devices and applications” Pearson Education; Fourth edition 2017.
4. Shaffer, Randall, “Fundamentals of Power Electronics with MATLAB”, Firewall media, 2013