POWER ELECTRONICS (18EE53)

POWER ELECTRONICS

Course Code 18EE53 CIE Marks 40
Number of Lecture Hours/Week (L:T:P) 3:2:0 SEE Marks 60
Credits 04 Exam Hours 03

Course Learning Objectives:

· To give an overview of applications power electronics, different types of power semiconductor devices,
their switching characteristics.
· To explain power diode characteristics, types, their operation and the effects of power diodes on RL
circuits.
· To explain the techniques for design and analysis of single phase diode rectifier circuits.
· To explain different power transistors, their steady state and switching characteristics and imitations.
· To explain different types of Thyristors, their gate characteristics and gate control requirements.
· To explain the design, analysis techniques, performance parameters and characteristics of controlled
rectifiers, DC- DC, DC -AC converters and Voltage controllers.

Module-1

Introduction: Applications of Power Electronics, Types of Power Electronic Circuits, Peripheral
Effects, Characteristics and Specifications of Switches.
Power Diodes: Introduction, Diode Characteristics, Reverse Recovery Characteristics, Power Diode
Types, Silicon Carbide Diodes, Silicon Carbide Schottky Diodes, Freewheeling diodes ,Freewheeling diodes
with RL load.
Diode Rectifiers: Introduction, Diode Circuits with DC Source connected to R and RL load, Single-Phase
Full-Wave Rectifiers with R load , Single-Phase Full-Wave Rectifier with RL Load .

Module-2

Power Transistors: Introduction, Power MOSFETs – Steady State Characteristics, Switching
Characteristics Bipolar Junction Transistors – Steady State Characteristics, Switching Characteristics,
Switching Limits, IGBTs, MOSFET Gate Drive, BJT Base Drive, Isolation of Gate and Base Drives,
Pulse transformers and Opto-couplers

 

Module-3

Thyristors: Introduction, Thyristor Characteristics, Two-Transistor Model of Thyristor, Thyristor Turn-
On, Thyristor Turn-Off, A brief study on Thyristor Types, Series Operation of Thyristors, Parallel
Operation of Thyristors, di/dtProtection, dv/dtProtection, DIACs, Thyristor Firing Circuits, Unijunction
Transistor.

 

Module-4

Controlled Rectifiers: Introduction, Single phase half wave circuit with RL Load, Single phase half wave
circuit with RL Load and Freewheeling Diode, Single phase half wave circuit with RLE Load, Single-Phase
Full Converters with RLE Load, Single-Phase Dual Converters, Principle of operation of Three- Phase duel
Converters.
AC Voltage Controllers: Introduction, Principle of phase control & Integral cycle control, Single-Phase
Full-Wave Controllers with Resistive Loads, Single- Phase Full-Wave Controllers with Inductive Loads,
Three-Phase Full-Wave Controllers. 

 

Module-5

DC-DC Converters: Introduction, principle of step down and step up chopper with RL load,
performance parameters, DC-DC converter classification.
DC-AC Converters: Introduction, principle of operation single phase bridge inverters, three phase bridge
inverters, voltage control of single phase inverters, Harmonic reductions, Current source inverters.

 

Course Outcomes: At the end of the course the student will be able to:

· To give an overview of applications power electronics, different types of power semiconductor devices,
their switching characteristics, power diode characteristics, types, their operation and the effects of power
diodes on RL circuits.
· To explain the techniques for design and analysis of single phase diode rectifier circuits.
· To explain different power transistors, their steady state and switching characteristics and limitations.
· To explain different types of Thyristors, their gate characteristics and gate control requirements.
· To explain the design, analysis techniques, performance parameters and characteristics of controlled
rectifiers, DC- DC, DC -AC converters and Voltage controllers.

Question paper pattern:

· The question paper will have ten questions.
· Each full question is for 20 marks.
· There will be 2 full questions (with a maximum of three sub questions in one full question)
from each module.
· Each full question with sub questions will cover the contents under a module.
· Students will have to answer 5 full questions, selecting one full question from each module.

Text Book

1 Power Electronics: Circuits Devices
and Applications
Mohammad H Rashid, Pearson 4th Edition, 2014

Reference Books

1 Power Electronics P.S. Bimbhra Khanna
Publishers
5th Edition, 2012

2 Power Electronics:
Converters, Applications
and Design
Ned Mohan et al Wiley 3rd Edition, 2014

3 Power Electronics Daniel W Hart McGraw Hill 1st Edition, 2011

4 Elements of Power Electronics Philip T Krein Oxford Indian Edition, 2008