Faculty of Engineering Handbook

POWER ELECTRONICS

Subject Code:	EEN3076
Objective:	To introduce students to power switching devices and their applications.
Pre-Requisite:	EEN1046: Electronics III
Credit Hours:	3
Contact Hours:	51 hours (lectures, tutorials, laboratories)
Assessment:	Lab: 10% Test/Quiz: 20% Tutorial/Assignment: 10% Final Examination: 60%
Laboratory:	1. Power Semiconductor Switches 2. Switch-mode Power Converter (Buck)
Details of Assignment:	Example: Title: Design of an uncontrolled full-bridge rectifier for R-L load based applications. Objective: To design and investigate the performance of the rectifier for R-L load based applications using simulation tools. Type: Design and simulation. Description: Students are expected to design and investigate the performance of the rectifier for R-L load based applications using simulation tools.
References:	Mohan, Undeland and Robbins, "Power Electronics", 2nd ed., Wiley,1995 Muhammad H. Rashid, "Power electronics : circuits, devices, and applications", 2nd ed., Englewood Cliffs, N.J., Prentice Hall, 1993 John G. Kassakian, Martin F. Schlecht, and George C. Verghese, "Principles of Power Electronics", Addision Wesley, 1991 M. Fisher, "Power Electronics", PWS-KENT Publishing Company, 1991 S.S.Ang, "Power-Switching Converters", Mercel Dekker, 1995

Course Contents

Overview of Power Semiconductor Switches
Power diodes, Thyristors, Power MOSFET, G.T.O., IGBT, Field controlled switches (SiT and SiTH), Comparison of Semiconductor Switches, Desired Characteristics in Controllable Switches, Drive and Snubber Circuits
Line-Commutated Diode Rectifiers
Uncontrolled rectifier, Single-Phase Diode Bridge Rectifiers, Three-Phase Full-Bridge Rectifiers, Inrush Current and Over-voltages at Turn-On, Line-Current Harmonics and Power Factor, Phase-Controlled Rectifiers and Inverters
DC-DC Switch-Mode Converters
Basic Topologies, Buck converter, Boost converter, Buck-Boost Converter, Flyback Converter
Switch-Mode DC-AC Inverters
Pulse-Width Modulation, Single-Phase Inverters, Three-Phase Inverters, Effect of Blanking Time on Output Voltage in PWM Inverters
Resonant Converters
Classification of Resonant Converters, Basic Concepts, Load-Resonant Converters, Resonant-Switch Converters
Power Supply Applications
Switching Power Supplies, Electrical Isolation, Protection Circuits, Power Supply Specification, Power Line Disturbances, Power Conditioners, Uninterruptible Power Supplies

Learning Outcome of Subject

At the completion of the subject, students should be able to :

describe the operational principles and concepts of power semiconductor switches

elaborate the operational principles and concepts of ac to dc rectifiers

apply the operational principles and concepts of dc to dc switch-mode converters.

describe the operational principles and concepts of dc to ac inverter

analyze the operational principles and concepts of resonant converters

elaborate the general concepts of switch-mode power supplies

apply circuit theory in analyzing power converter circuits

design switching driver circuits for switch-mode converters

apply over-voltage protection circuits in switch-mode power circuits

undertake, under supervision, laboratory experiments to analyse the switching behaviours of thyristor and power BJTs as well as investigating the output behaviours of buck converter circuit

Programme Outcomes (% of contribution)

Ability to acquire and apply fundamental principles of science and engineering. - 10%

Capability to communicate effectively. - 10%

Acquisition of technical competence in specialized areas of engineering discipline. - 40%

Ability to identify, formulate and model problems and find engineering solutions based on a system approach. - 10%

Ability to conduct research in chosen fields of engineering.- 10%

Understanding of the importance of sustainability and cost-effectiveness in design and development of engineering solutions.- 10%

Ability to work independently as well as with others in a team.- 10%