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PhD High-precision power converter with ultra-high effective switching frequency

PhD High-precision power converter with ultra-high effective switching frequency

Electromechanics and Power Electronics group is looking for a PhD in High-precision single-phase power converters with ultra-high effective switching frequency


Research challenge

This project focuses on the research, analysis, design, building and testing of a power converter with ultra-high precision output that has an ultra-high effective switching frequency. This involves research in calibration and self-learning techniques, as well as precision-enhancing techniques and topologies. Validation has to be carried out using a prototype that is targeting a semiconductor lithography application. The research is part of a European project (IC Technology for the 2nm node – IT2) and will be conducted within the Electromechanics and Power Electronics (EPE) group of the Department of Electrical Engineering, in close cooperation with the control systems (CS) group, ASML and Prodrive.

To enable 2nm node technology and 200 wafer per hours productivity for preserving the leading role of EU in Integrated Circuit (IC) manufacturing, a new generation of ultra-high precision power amplifiers is needed to enable precise positioning of the wafer stage with sub-nanometer accuracy. The positioning accuracy depends, among others, on the bandwidth and current ripple of the power amplifier, which can be optimized by integrating more advanced amplifier hardware and digital control.

The objective of this PhD research is to research power converters with an ultra-high switching frequency to thereby significantly enhance the available control bandwidth. This allows tighter control and better disturbance suppression at the relatively low frequencies of interest in the application. The research also involves laboratory work in terms of implementation and experimental verification of the work by designing and building a prototype converter in collaboration with the industrial partners. The research output ultimately serves as a basis for future advancements in semiconductor technology.

Main research directions

  • Optimization of GaN semiconductor technology operating at ultra-high effective switching frequencies: modeling, analysis, and implementation.
  • Multi-rate topologies for efficient high-frequency operation.
  • Advanced cooling of GaN semiconductor technology for performance optimization.
  • Modeling and design of passive components for improved accuracy at high frequencies.
  • Modulation and compensation methods for converter linearization.

Electromechanics and Power Electronics group

The EPE-group research activities span all facets of electromechanics and power electronics, such as linear and rotary electrical machines, multi-level and high-precision power converters. The EPE group has a strong interconnection with industry via direct, national and European funded projects in a variety of application areas like high-tech systems (semicon, robotics, medical) and sustainable energy (mobility, transport, smart grids). EPE owns a modern (opened in 2015) research laboratory (680m2) with additional workshop facilities and an additional educational laboratory. The PhD student will join the group and collaborate intensely with the other members of the EPE group (around 50 researchers), where he/she will participate in a mix of academic and industrial research activities. Research within the EPE Group is characterized by personal supervision.


For the PhD position in this project, a candidate with a MSc degree in Electrical Engineering, Physics or Applied Physics will be selected and hired as a doctoral student in the Electromechanics and Power Electronics Group ( for a 4-year period. The candidate should have the following competences:

  • Affinity and/or interest in power electronic converters with ultra-high precision and switching frequency, with practical experience in power electronic converters.
  • Academic background in fundamentals of power conversion with strong analytical capabilities.
  • Good programming skills in MATLAB, and well-versed in Simulink and (multi-physical) FEM programs.
  • A team-player with excellent communication and cooperation skills in a multi-partner and multi-disciplinary project environment.
  • You are creative and ambitious, hard-working and persistent.
  • Ability to independently organize your work.
  • Good scientific writing skills.
  • Strong command of the English language (knowledge of the Dutch language is not required).

The candidate will closely cooperate with the other parties involved in this project. The CV must include a complete list of marks obtained during your whole university career.


  • The position is available immediately.
  • Challenging job in a dynamic and ambitious university and a stimulating internationally renowned research environment.
  • Full-time temporary appointment for 4 years.
  • Gross salary between € 2.325,00 and € 2.972,00.
  • An extensive package of fringe benefits (e.g. excellent technical infrastructure, the possibility of childcare and excellent sports facilities).

Informatie en sollicitatie


For more information about the project, please contact dr. ir. Bas Vermulst (b.j.d.vermulst[at]

More information on employment conditions can be found here:


If interested, please use 'apply now'-button at the top of this page. You should upload the following: a detailed curriculum vitae including a complete list of the marks obtained during your whole university career, a letter of motivation and portfolio with relevant work. Recommendations will be requested upon the submission of the documents:

  • A cover letter explaining your motivation and suitability for the position;
  • A detailed Curriculum Vitae (including a list of publications and key achievements in research project(s);
  • Contact information of at least two references;
  • Copies of diplomas with course grades;
  • Graduation thesis.

Please note that a maximum of 1 document can be uploaded, so if you have more than 1 document you will have to combine them.

We look forward to your application and will screen it as soon as we have received it. Screening will continue until the positions have been filled.

Applications by e-mail are not accepted.