Power Electronics
Subject Code: EEN3076
Aim of Subject: To introduce students to power switching devices and their applications.
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:
  • Ability to acquire and apply fundamental principles of science and engineering(10%)
  • Capability to communicate effectively(10%)
  • Acquisition of technical competence in specialised areas of engineering discipline(40%)
  • Ability to identify, formulate and model problems and find engineering solutions based on a systems approach(10%)
  • Ability to conduct investigation and research on engineering problems in chosen field of study(10%)
  • Understanding of the importance of sustainability and cost-effectiveness in design and development of engineering solutions(10%)
  • Ability to work effectively as an individual, and as a member/leader in a team(10%)

Assessment Scheme:
  • Lab Experiments - work in group of 2, lab report writing, on spot evaluation at the lab(10%)
  • Tutorial / Assignment - group assignment, focus group discussion at tutorial, to enhance understanding of basic concepts in lecture(10%)
  • Test/Quiz - written exam(20%)
  • Final Exam - written exam(60%)
Teaching and Learning Activities : 51 hours (lectures,tutorials and laboratory experiments)
Credit Hours: 3
Pre-Requisite: EEN1026: Electronics II
Text Book:
  • Mohan, Undeland and Robbins, “Power Electronics”, 3rd ed., Wiley, 2003

  • Muhammad H. Rashid, “Power electronics  : circuits, devices, and applications”,  3rd ed., Englewood Cliffs, N.J., Prentice Hall, 2004

  • 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

Subject 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


1. Power Semiconductor Switches
2. Switch-mode Power Converter (Buck)