Power Electronics - Components, Converters, Control and Applications (EIEN 25)

Why take this course?

The growth of humanity, from less than 2 billion in the end of the 19th century to over 7 billion in the beginning of the 21st century is strongly related to our ability to use energy. The use of fossile energy cause severe problems with the environment and is truly challenging the future of man kind. We strongly need I) to reduce our use of energy and II) to transfer from fossil and probably nuclear to renewable energy sources.

This is where Power Electronics is important. Independent of primary energy source, a lot of our use of energy involves electric energy technology. Manufacturing, transport, lighting, ventilation, heating, electricity transmission, physics research, ... all involve one or several steps where the energy is converted to electricity before finally consumed. In addition, renewable energy sources like wind, wave and solar are entirely dependent on conversion of the primary energy source to electricty as an intermediate state before finally consumed.

ABB_robot Electric CarLED driver Fan Heatpump HVDC  ESS 

In most, if not all, of these applications the energy is converted by means of switching power electronics converters built by power semiconductors and controlled in real time by very fast control systems. The development of modern power electronics started half a century ago and is today developing faster than ever before. As an engineer with ambitions to work with, or just understand the fundaments of, electric energy conversion and control, it is important t study power electronics - it is involved "everywhere" in electric energy flow control.

This course is given to provide a deep understanding of the technologies involved, the requirements and limitations, the opportunities and to give the understanding and tools to help those who want to contribute to the development.

The course is built on lectures,labs, exercises. The labs are prepared within the Matlab/Simulink environment such that you by the computer get a chanse to understand the dynamic behaviour that you will se on instruments in the lab.


The course is given by Professor Mats Alaküla, and Associate Professor Avo Reinap.

The course is assisted by Philip Abrahamsson, Akanksha Upadhyey, Max Collins and Samuel Estenlund, all PhD students at IEA.


Lecture 1 - Intro & Switches

Lecture 2 - Bridges, switches and snubbers

Lecture 3 - Q1, Q2 and single phase modulation

Lecture 4 - Q4 and two phase modulation

Lecture 5 - Speed Control

Lecture 6 - DC Current Control

Lecture 7 - Torque generation

Lecture 8 - DC machine

Lecture 9 - AC and three phase modulation

Lecture 10 - AC Current Control

Lecture 11 - Grid Connected Power Converters

Lecture 14 - Passive components

Lecture 15 - PMSM with control

Lecture 16 - Semiconductor components I

Lecture 18 - Semiconductor components II

Lecture 19 - Losses

Lecture 20 - Cooling

Lecture 21 - Induction Machine

Lecture 22 - Guestlecture_automotive

Lecture 23a - Introduction to MMC

Lecture 23b - Multilevel Converters

Lecture 24 - EMC

Lecture 25 - Summary

Study guide

Suitable book chapters and exercises matched with lectures


Exercises with solutions, updated 2019-02-06


Lab 1 - The flyback converter

Installation of LTspice IV or XVII Software

  • Download LTspice IV or XVII
  • Simulation exercise (Deadline 28/1: akanksha.upadhyay(at)iea.lth.se)

  • Instructions & what to investigate?
  • Library and schematic files for Flyback converter simulation exercise
  • Lab manual (Derive expressions for 3, 4, 5 before your lab session)

  • Lab manual

  • Lab 2 - The H-bridge converter

    Simulation exercise (Deadline 18/2: akanksha.upadhyay(at)iea.lth.se) H-bridge dc/dc converter

  • Design of an Analog Modulator for an H-Bridge dc-dc converter
  • Assignment 2 - half bridge circuit

    Lab manual (Do exercises 1, 3, 4 and 5 before your lab session)

  • Lab manual
  • A short report regarding the simulation exercise should be handed in latest 28th of February by email to akanksha.upadhyay(at)iea.lth.se

    Lab 3 - The DC machine

  • Manual for the DC machine lab
  • Instructions
  • Simulation files

    Samuel Estenlund in Room 2375 M-building 2nd floor
    Or email samuel.estenlund(at)iea.lth.se

  • Videos

    Lab 4 - The active filter

  • Manual for the active filter lab
  • Instructions
  • Simulation files

    Max Collins in Room 2373 M-building 2nd floor
    Or email max.collins(at)iea.lth.se

    Lab 5 - The PMSM

  • Manual for the PMSM lab
  • Instructions
  • Simulation files

    Samuel Estenlund in Room 2375 M-building 2nd floor
    Or email samuel.estenlund(at)iea.lth.se

  • Videos: Introduction
  • Videos: Comments
  • Doodle to sign up for the lab

    Lab 6 - The induction machine

  • Instructions and simulation files

    Samuel Estenlund in Room 2375 M-building 2nd floor
    Or email samuel.estenlund(at)iea.lth.se

  • Videos: Introduction

    Previous Exams

    Course Material

    Course Plan

    Course compendium This book is subject to being upgraded during the course. Please check in here for pdated versions.




  • Contact

    The Student adminstration office is open weekdays 11:00-12:30 on the second floow in the M-building. Other times by agreement.

    Phone: 046-229290

    Mail: studexp@iea.lth.se

    Exercise file updated with new solution to Exam 2012-05-21 question 1, 2017-05-30, question2 and some layout improvements.