PhD Candidate for Developing Multi-Physics Models of High-Power Medium Frequency Transformers / PhD Candidate for Developing Multi-Physics Models of High-Power Medium Frequency Transformers

PhD Candidate for Developing Multi-Physics Models of High-Power Medium Frequency Transformers

100%, Zurich, fixed-term

The Laboratory for High Power Electronic Systems (HPE) at the Department of Information Technology and Electrical Engineering of ETH Zurich conducts internationally leading research on power electronic converter systems. These systems are essential for future energy distribution networks that integrate renewable energy sources and are pivotal in traction applications like electric vehicles. Another significant focus of research is on solid-state pulse modulators for medical applications, including computer tomography and cancer treatment, as well as for particle accelerators such as those at CERN. To advance the design and optimization of various power electronic systems, we develop advanced multi-physics models, digital twins, and virtual prototypes at both the component and system levels. For an exciting new research project on Solid-State Transformers aimed at future data centres, we are seeking a:

Job Description

We are looking for highly motivated individuals with an outstanding academic background who are interested in pursuing a PhD in the critical and multidisciplinary field of modeling and optimizing high-power, medium-frequency transformers (MFTs). These compact and highly efficient transformers, operating at kilohertz frequencies, serve as key components in high-power DC-DC converters, which are central to solid-state transformers (SSTs). SSTs are increasingly required in future AI data centers, where power consumption per computer rack can reach several hundred kilowatts or even megawatts. To efficiently transfer energy from the power grid to CPUs and GPUs, higher system voltages are essential in data centers, making efficient power electronics converter systems based on SSTs crucial for managing the dynamically changing power flow.

To push the limits of efficiency and power density for these SSTs, you will develop multi-physics models of transformers that detail not only the high-frequency losses in the windings and core but also the cooling and temperature distribution within the transformer, resonances in the winding due to parasitic capacitances, and the electrical insulation aspects. Additionally, you will work on optimizing the core and winding geometry, developing advanced cooling concepts, and designing efficient connections for high-current windings. Your efforts will culminate in identifying technological barriers to achieving optimal power transfer and efficiency for MFTs.

The developed models will be integrated into optimization procedures for power electronic converter systems in a computationally efficient manner, essential for attaining superior system efficiencies and power densities, thus maintaining a competitive edge. These models will also contribute to a broader modeling framework development project at HPE, providing opportunities for collaboration with other PhD candidates on various modeling aspects. To validate new concepts and models, you will design and build MFT prototypes, as well as converter systems, to operate under realistic conditions.

Profile

• You must hold a diploma or M.Sc. degree in electrical engineering with excellent grades.
• Fundamental knowledge of power electronic converter systems.
• Strong communication skills.
• Fluency in English.
• A readiness to fully commit to being part of an international team.
• An interest in detailed modeling and design of magnetic components and optimizing power electronic systems.

Workplace

We Offer

• Your job with impact: Become part of ETH Zurich, a university that supports your professional development and actively contributes to positive societal change.
• Commitment to a sustainable and climate-neutral university.
• Numerous benefits, including public transport season tickets, car sharing, a wide range of sports offered by ASVZ, childcare, and attractive pension plans.
• A challenging and scientifically stimulating full-time position in a dynamic, international team at one of the world's leading technical universities.
• Encouragement for participation in international conferences alongside a competitive salary, excellent benefits, and outstanding research and laboratory facilities for your experiments.

We Value Diversity and Sustainability

In keeping with our values, ETH Zurich fosters an inclusive culture. We promote equality of opportunity, value diversity, and nurture a working and learning environment where the rights and dignity of all staff and students are upheld. For more information, please visit our Equal Opportunities and Diversity website to learn how we create a fair and supportive environment for all. Sustainability is a core principle for us, and we are committed to advancing toward a climate-neutral future.

Curious? So Are We.

We look forward to receiving your online application, which should include the following documents:

• Comprehensive CV
• B.S. and M.Sc. transcripts
• Electronic copies of your B.Sc/M.Sc. thesis and/or publications (if available)
• Names and addresses of references

Apply online using the form below. Please note that only applications matching the job profile will be considered.

For further information about the Laboratory for High Power Electronic Systems (HPE), please visit our website. For inquiries, contact Prof. Dr. Jürgen Biela at +41 44 632 69 22 or via email at jbiela@ethz.ch (no applications).

About ETH Zurich

ETH Zurich is one of the world’s leading universities in science and technology, renowned for its excellent education, cutting-edge research, and the direct application of new knowledge for societal benefit. With over 30,000 individuals from more than 120 countries, our university fosters an environment that promotes independent thinking and inspires excellence. Located at the heart of Europe, we collaborate globally to create solutions for today’s and tomorrow’s challenges.