Welcome to Advanced Topics in Pulse Width Modulation for Voltage Source Converters

Description: These days the electric energy conversion is mainly based on single and three-phase voltage source converters (VSC), starting from low up to high power. Different topologies are used for VSCs depending on their application, such as: power rating, voltage/current rating, employed semiconductor devices etc. The pulse width modulation (PWM) methods are the key techniques to control such VSCs.

The objective of the course is to present the PWM techniques, starting from the theoretical aspects to the practical issues. Thus, the course starts with a brief presentation of the classical PWM schemes, which is followed by a hands-on experience in simulations and dSpace controlling electrical drives. A new trend is to use highly integrated converters by employing wide bandgap devices, where soft switching is applied. Several soft switching techniques and design aspects are presented, followed by reliability issues of the power devices.

The morning session of the second day starts with presentation of the state of art semiconductor devices used in medium power converters and their limitations related to the modulation schemes. The afternoon session focuses on used in high voltage converters (typically used in energy transport). Due to their high efficiency, scalability, high reliability the Modular Multilevel Converters (MMC) are in the focus of the researchers. Different topologies, modulation and control techniques for MMC are presented, while the testing of the presented methods are done by using simulation models.

Course Programme:

Day 1, 08.30-17.00

08:30-08:45: Registration & Welcome;

08:30-10:00: Basics of PWM for 2 level topologies

10:30-12:00: Simulation models for different PWM schemes

13:00-13:45: Soft switching techniques for highly integrated converters

13:45-14:30: Effects of the modulation on the power switches

15:00-16:30: Laboratory exercise: Implementation of the modulation schemes in dSpace environment

16:30-17:00: Discussion

Day 2, 08.30-17.00

08:30-10:00: Medium power converters

10:30-12:00: Laboratory exercises

13:00-13:45: MMC – Topologies

13:45-14:30: MMC – Modulation and control

15:00-16:30: Simulation techniques for MMC using Matlab/Simulink and/or Plecs

16:30-17:00: Discussion


Organizer: Associate Professor Laszlo Mathe, lam@et.aau.dk, Aalborg University

Lecturers: Professor Stig Munk-Nielsen, Aalborg University, Associate Professor Laszlo Mathe, Aalborg University, Associate Professor Sanjay Kumar Chaudhary, Aalborg University


Price: 6000 DKK for PhD students outside of Denmark and 1500 DKK for PhD students in Denmark, who are not from AAU. 8000 DKK for the Industry.

Time: 6-7 March 2017


Zip code:


Number of seats: 30

Deadline: 13 February 2017


Important information concerning PhD courses We have over some time experienced problems with no-show for both project and general courses. It has now reached a point where we are forced to take action. Therefore, the Doctoral School has decided to introduce a no-show fee of DKK 5,000 for each course where the student does not show up. Cancellations are accepted no later than 2 weeks before start of the course. Registered illness is of course an acceptable reason for not showing up on those days. Furthermore, all courses open for registration approximately three months before start. This can hopefully also provide new students a chance to register for courses during the year. We look forward to your registrations.