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 electricity 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.

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


L1_Intro&Switches, Video
L2_Bridges&Snubbers, Video
L3_Modulation, Video
L4_4QModulation&Thermal (Including Exercise 4), Video
L5_Thermal&SpeedControl, Video
L6_DC CurrentControl, Video
L7_TorqueGeneration, Video
L8_DC Machine and Control, Video
L9_3phaseModulation, Video
L10_3PhaseCurrentControl, Video1, Video2
L11&12 StaticVArComp&ActiveFilters, Video1, Video2
Guest Lecture Active Filters Video only
L13&14_PassiveComponents, Video13,Video14
L15_PMSM Modelling, Video
L16_PMSM Control, Video
L17_PowerSemiconductors, Video
L18_Losses, Video
L19_Cooling, Video
L20_GuestLecture_PowerSemiconductors, Video1
L21_InductionMachine, Video1, Video2
L22_EMC, Video
L23_Guest Lecture on EMC in heavy vehicles (only Video)
L24_Resonance & Multi level converters, Video
, Video1 + Video2

A special link to the conference "Elvägar och framtidens transporter". This conference is given in Swedish!


Exercises with solutions (Updated 2021-05-18)

Exercise1&2. E1.1, E1.2, E1.3, E1.4, E1.5, Video
Exercise 3. Video, Whiteboard
Exercise 4 - Included in L4 above. E1.6, E1.7
Exercise 5 - Video, Whiteboard
Exercise 6. Video.
Exercise 7- Included in L7 above
Exercise 8 - Included in L8 above
Exercise 9. Video
Exercise 10. Became more of a Lecture - see Lecture 10 videos above
Exercise 14. Inductor design with Excel
Exercise 16, PMSMmodelling
Exercise 18, PowerSemiconductors

Extra Simulink models for:
3Phase2LevelCurrent Control


Lab 1 - The flyback converter

Simulation exercise before the lab:
  1. Download LT Spice
  2. Instructions & what to investigate?
  3. Library and schematic files for Flyback converter simulation exercise
  4. 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

Video laboration

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 (Including thermal)

Lab preparation lecture

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

Video laboration

Lab 3 - The DC machine

Lab 4 - The active filter

Lab manual
Home assignment instructions
Simulation files

Lab 5 - The PMSM

Lab 6 - The induction machine

Previous Exams

Old Exams

Course Material

Course Plan with Study guide

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





All lecture invitations are now updated as session-specific. Thus, you need to log in to each event with a unique Zoom-link, sent by mail.

All teaching will be made via Zoom, until further notice, as a consequence of the Corona pandemic.

This course is lab-intensive, with 6 different labs that each of them contain prestudies in the form of simulation work, and laboratory exercises, both of which involves report writing. As long as the Covid-situation does not lighten, all these labs will be run in a virtual form, based on pre-recorded lab activities that the student will evaluate and analyse to build the lab reports on.

IF the Corona restrictions lighten enough, teaching may return to normal class room / lecture hall sessions as well as physical labs again.

The teaching sessions will be recorded and made available to download from this page.


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_iea(@)listserver.lu.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