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 Akanksha Upadhyey, Max Collins and Samuel Estenlund, all PhD students at IEA.


Lecture 1 - Intro & Switches

Lecture 2 - Bridges and snubbers

Lecture 3 - DC/DC conv + 1 phase modulation

Lecture 4 - H-bridge + 2 phase modulation

Lecture 5 - Speed Control

Lecture 6 - DC Current Control

Lecture 7 - Torque Generation

Lecture 8 - DC Machine

Study guide

Suitable book chapters and exercises matched with lectures


Exercises with solutions


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
  • IF you have problems using installing and using the specific transisitor in the flyback circuit, any other suitable model in the buoild in library can be used instead.
  • Lab manual (Derive expressions for 3, 4, 5 before your lab session)

  • Lab manual

  • A short report regarding the simulation exercise should be handed in latest 14th of February by email to akanksha.upadhyay(at)iea.lth.se

  • Lab 2 - The H-bridge converter

    Simulation exercise (Deadline 5/2: 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)

    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

    Lab manual
    Home assignment instructions
    Simulation files
    Introduction videos
    Doodle link for lab signup

    Supervisor: Samuel Estenlund in Room 2469A M-building 2nd floor (above formula student)
    or email samuel.estenlund(at)iea.lth.se

    Lab 4 - The active filter

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    Lab 5 - The PMSM

  • Lab 6 - The induction machine

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    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.

    The teachers (except Mats) are all located in the south east corridor of the M-building, one floor above ground.

    Phone: 046-229290


    Secretary:    studexp(at)iea.lth.se

    Akanksha:   akanksha.upadhyay(at)iea.lth.se

    Max:   max.collins(at)iea.lth.se

    Samuel:   samuel.estenlund(at)iea.lth.se

    Mats:   mats.alakula(at)iea.lth.se

    Avo:   avo.reinap(at)iea.lth.se