PhD Courses in Denmark

Welcome to EMI/EMC in Power Electronics (2025)

Description: With a rapid advancement of power switching devices and digital signal processing units, power electronics technology has found its way into many applications of renewable energy generation, transmission, and consumption. Although power electronics systems are a key enabler as a cross-functional technology in the energy conversion process, their pulse energy conversion with inherent switching behavior exhibits disturbing harmonic emissions and electromagnetic noises. 

Recently, with the high penetration of power electronic systems and advent of new power semiconductor devices known as wide-band gap (WBG) the importance of understanding and preventing power converter switching disturbances has significantly elevated. The generated harmonic and noise disturbances can result in electromagnetic interference (EMI) and should be controlled within specific limits by applying proper filtering, topology, and control schemes. Thereby, to prevent the power converters from disturbing their own operation and other nearby electronic devices they should be designed for electromagnetic compatibility (EMC).

The emphasis of this course is to give a complete and clear picture of EMI issues and mitigation methodologies. Systematic designing of passive EMI filters for differential mode (DM) and common mode (CM) noises in single-phase and three-phase systems will be provided. Printed circuit board (PCB) design criteria, passive and active components parasitic and shielding approaches in reducing near-field couplings will be covered as well. Furthermore, time and frequency domain modeling of conducted low and high frequency emission noises through developing equivalent circuit models of power electronics converters to reduce the analysis complexity and prevent from conventional trial and error design approach will be addressed. This course will also focus on new challenges within the new frequency band of 2-150 kHz in power electronic based power systems. The course content is combined with real-world application examples and demonstrations.

In the first day, the course will focus on the basics of harmonics generated by switching, EMI issues in PWM converters, components parasitic, measurement requirements, interference mechanisms, filtering components and strategies. In the second day, there will be more focus on advanced topics such as magnetic coupling, EMI prediction, Shielding and new standard requirements. The second day will be supported with industrial examples and real-world design experience regarding different aspects of EMI/EMC in power electronics. In the third day, the course will dig into the details of parasitic capacitances in magnetic components, practically showing the measurement methods of using an impedance analyzer. The recent research on numerical and analytical EMI/modelling and supraharmonics will also be introduced in the third day.

Key words: Electromagnetic Interference, Electromagnetic Compatibility, Power Electronics, Supraharmonics, EMI Prediction, EMI filter design

Prerequisites: This course is intended for intermediate and advanced researchers and engineers in the field of power electronics and its applications, for EMC specialists and advanced university students exploring new harmonics and EMI challenges in power electronics-based power systems and WBG-based power electronic systems. General knowledge in power electronics converter operation modes, passive components and basic control theory are preferred. Course exercises and mini projects will be performed on MATLAB/LTSPICE software platform.

Learning objectives: 

1- EMI Prediction and Filtering in Power Electronics

2- Understanding EMI mechanisms and EMC Design Strategy in Power Electronics

3- Analytical Modeling and Parasitic Measurement

Teaching methods: Lectures, Group work, Presentations, Excercise, Demonstration

Form of evaluation: The participants will work on the design for EMC exercises from the final 1st day of lecture. Two to three design exercises will be provided. The exercises are defined based on a real application design and one exercise will be assigned to a group of four people. The participants are required to study the exercises prior to the lecture. In the 2nd day of lecture, the groups will start to work on their mini projects, with necessary support and Q&A by the lecturers. Groups will continue to compare and deeply discuss their design method and choices on the 3rd day and present their results and solutions in a presentation form to the class during the 3rd day to get feedback from the lecturers to better work out their solutions. Later each group will have one week after the lecture to submit their solutions to the course coordinator in a pdf format for final evaluation.

Criteria for assessment: 

1 - Written report with solutions on the power electronics EMI/EMC design exercise 

2- Powerpoint presentation

Remarks: In total 56 hours [20 hours for Preparations, 22 hours for Teaching, 8 hours for Practicing and Assignment, and 6 hours for finalizing report.] 

Key literature: TBA

Organizer: Associate Professor Pooya Davari, pda@energy.aau.dk

Lecturers: 

Professor Eckart Hoene - Aalborg University and Fraunhofer IZM,

Dr. Christian Wolf, Lead Specialist, EMC & Power Electronics - Grundfos Holding A/S,

Associate Professor Pooya Davari - Aalborg University

Assistant Professor Hongbo Zhao – Aalborg University

External lecturers: Professor Eckart Hoene - Aalborg University and Fraunhofer IZM, Dr. Christian Wolf, Lead Specialist, EMC & Power Electronics - Grundfos Holding A/S

ECTS: 2.0

Time: 11, 12, 13 November 2025

Place: Aalborg University (AAU Energy - Room: TBA)

Zip code: 9220

City: Aalborg

Maximal number of participants: 25

Deadline: 21 October 2025