PhD Courses in Denmark

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.

For additional information, updates, and registration, please refer to AAU PhD Moodle via the link provided on the right side of this page.