Thomas Guillod / CV


Location: NH, USA
Citizenship: Switzerland linkedin.com/in/tguillod
Birth year: 1989 github.com/otvam

Work Experience

04.2021 - current

Researcher, Thayer School of Engineering, Dartmouth College, NH, USA

Modeling techniques for high-performance ferrite materials

07.2020 - 06.2021

Independent Engineering Consultant, Zurich, Switzerland

Magnetic component design, converter optimization, dielectric barrier discharges

11.2018 - 07.2020

Postdoctoral Researcher, ETH Zurich, Switzerland, Power Electronic Systems Lab.

Medium-voltage and/or high-frequency magnetics, machine learning, thesis supervision

09.2013 - 11.2018

Research & Teaching Assistant, ETH Zurich, Switzerland, Power Electronic Systems Lab.

Design and construction of medium voltage DC-DC converters, teaching

04.2013 - 07.2013

Research Assistant, ETH Zurich, Switzerland, High Voltage Lab.

Study of high voltage corona discharges with mixed AC/DC voltages

09.2011 - 12.2011

Intern, Bombardier Transport, Propulsion and Controls, Zurich, Switzerland

Simulation of traction chain of high-speed trains (transformer and converter)

08.2008 - 09.2009

Teacher Substitute, CIFOM-ET, Le Locle, Switzerland

Mathematics and physics teaching at a technical high school

Education

09.2013 - 11.2018

Doctorate, ETH Zurich, Switzerland, Power Electronic Systems Lab.

Modeling and Design of Medium-Voltage Medium-Frequency Transformers

02.2011 - 03.2013

Master of Science, ETH Zurich, Switzerland, Electrical Engineering and Inf. Tech.

Focus on numerical methods, field theory, and high voltage technology

Overall grade point average: 5.8 out of 6.0 (with distinction)

09.2012 - 03.2013

Master Thesis, ETH Zurich, Switzerland, High Voltage Lab. (with Swissgrid)

Simulation of AC/DC Hybrid Overhead Lines

09.2007 - 02.2011

Bachelor of Science, ETH Zurich, Switzerland, Electrical Engineering and Inf. Tech.

Major: Energy and Power Electronics

Overall grade point average: 5.5 out of 6.0 (very good)

Languages

French
Native speaker
English
Fluent (C1) - Master and PhD studies in English, many publications in English
German
Fluent (C1) - Bachelor studies in German, Intensivkurs Deutsch als Fremdsprache

Skills

Science
Numerical simulations, multi-objective optimization, magnetics, converter design,
high-frequency measurements, high-voltage testing, machine learning
Computer
Linux, Windows, Word, Excel, Powerpoint, Illustrator, LaTeX,
COMSOL, Ansys, Altium Designer, Inventor, Simulink, SPICE, PLECS
Programming
Python, Keras, TensorFlow, MATLAB, Qt, C, Java, DSP, Bash
Open-source
Creation and maintenance of scientific open-source tools

Peer-Reviewed Scientific Journal Papers

[JESTPE 2021]
T. Guillod, P. Czyz, and J. W. Kolar, “Geometrical Optimization of Medium-Frequency Air-Core Transformers for DCX Applications”, IEEE J. Emerg. Sel. Topics Power Electron., 2021
[JESTPE 2021]
P. Czyz, T. Guillod, D. Zhang, F. Krismer, R. Färber, J. Huber, C. M. Franck, and J. W. Kolar, “Analysis of the Performance Limits of 166 kW / 7 kV Air-Core and Magnetic-Core Medium-Voltage Medium-Frequency Transformers for 1:1-DCX Applications”, IEEE J. Emerg. Sel. Topics Power Electron., 2021
[MDPI 2021]
P. Czyz, P. Papamanolis, F. Trunas Bruguera, T. Guillod, F. Krismer, V. Lazarevic, J. Huber, and J. W. Kolar, “Load-Independent Voltage Balancing of Multi-Level Flying Capacitor Converters in Quasi-2-Level Operation”, MDPI Electronics, 2021
[JESTPE 2021]
P. Czyz, T. Guillod, F. Krismer, J. Huber and J. W. Kolar, “Design and Experimental Analysis of 166 kW Medium-Voltage Medium-Frequency Air-Core Transformer for 1:1-DCX Applications”, IEEE J. Emerg. Sel. Topics Power Electron., 2021
[TPEL 2020]
P. Papamanolis, T. Guillod, F. Krismer, and J. W. Kolar, “Transient Calorimetric Measurement of Ferrite Core Losses up to 50MHz”, IEEE Trans. Power Electron., 2021
[OJPEL 2020]
P. Papamanolis, T. Guillod, F. Krismer, and J. W. Kolar, “Minimum Loss Operation and Optimal Design of High-Frequency Inductors for Defined Core and Litz Wire”, IEEE Open Access Journal of Power Electronics, 2020
[OJPEL 2020]
T. Guillod, P. Papamanolis, and J. W. Kolar, “Artificial Neural Network (ANN) Based Fast and Accurate Inductor Modeling and Design”, IEEE Open Access Journal of Power Electronics, 2020
[CPSS 2020]
T. Guillod and J. W. Kolar, “Medium-Frequency Transformer Scaling Laws: Derivation, Verification, and Critical Analysis”, IEEE CPSS Trans. on Power Electron. and App., 2020
[MDPI 2019]
R. Färber, T. Guillod, F. Krismer, J. W. Kolar, and C. M. Franck, “Endurance of Polymeric Insulation Foil Exposed to DC-Biased Medium-Frequency Rectangular Pulse Voltage Stress”, MDPI Energies, 2019
[JESTPE 2019]
T. Guillod, R. Färber, F. Krismer, C. M. Franck, and J. W. Kolar, “Dielectric Losses in Dry-Type Insulation of Medium-Voltage Power Electronic Converters”, IEEE J. Emerg. Sel. Topics Power Electron., 2019
[TPEL 2019]
T. Guillod, D. Rothmund, and J. W. Kolar, “Active Magnetizing Current Splitting ZVS Modulation of a 7kV/400V DC Transformer”, IEEE Trans. Power Electron., 2019
[JESTPE 2019]
D. Rothmund, T. Guillod, D. Bortis, and J. W. Kolar, “99% Efficient 10kV SiC-Based 7kV/400V DC-Transformer for Future Data Centers”, IEEE J. Emerg. Sel. Topics Power Electron., 2019.
[JESTPE 2019]
D. Rothmund, T. Guillod, D. Bortis, and J. W. Kolar, “99.1% Efficient 10kV SiC-Based Medium Voltage ZVS Bidirectional Single-Phase PFC AC/DC Stage”, IEEE J. Emerg. Sel. Topics Power Electron., 2019.
[ELEN 2018]
T. Guillod, F. Krismer, and J. W. Kolar, “Magnetic Equivalent Circuit of MF Transformers: Modeling and Parameter Uncertainties”, Springer / Electrical Engineering, 2018
[ELEN 2017]
R. Bosshard, T. Guillod, and J. W. Kolar, “Electromagnetic Field Patterns and Energy Flux of Efficiency Optimal Inductive Power Transfer Systems”, Springer / Electrical Engineering, 2017
[JESTPE 2017]
T. Guillod, F. Krismer, and J. W. Kolar, “Protection of MV Converters in the Grid: The Case of MV/LV Solid-State Transformers”, IEEE J. Emerg. Sel. Topics Power Electron., 2017
[TPWRD 2014]
T. Guillod, M. Pfeiffer, and C. M. Franck, “Improved Coupled Ion-Flow Field Calculation Method for AC/DC Hybrid Overhead Power Lines”, IEEE Trans. Power Del., 2014
[JPIER 2013]
T. Guillod, F. Kehl, and C. Hafner, “FEM-based Method for the Simulation of Dielectric Waveguide Grating Biosensors”, Progress in Electromagnetics Research, 2013
[TPS 2013]
D. Gerber, T. Guillod, J. Biela, and R. Leutwyler, “Gate Unit with Improved Short Circuit Detection and Turn-Off Capability for 4.5kV Press-Pack IGBTs Operated at 4kA Pulse Current”, IEEE Trans. Plasma Sci., 2013

Peer-reviewed International Conference Proceedings

[COMPEL 2022]
D. Serrano, H. Li, T. Guillod, S. Wang, M. Luo, C. R. Sullivan, M. Chen, “Neural Network as Datasheet: Modeling B-H Loops of Power Magnetics with Sequence-to-Sequence LSTM Encoder-Decoder Architecture”, IEEE COMPEL, Israel, 2022
[APEC 2022]
H. Li, D. Serrano, T. Guillod, E. Dogariu, A. B. Nadler, S. Wang, M. Luo, V. Bansal, Y. Chen, C. R. Sullivan, M. Chen, “MagNet: an Open-Source Database for Data-Driven Magnetic Core Loss Modeling”, IEEE APEC, USA, 2022
[CIPS 2020]
M. Kasper, L. Peluso, G. Deboy, G. Knabben, T. Guillod, and J. W. Kolar, “Ultra-high Power Density Server Supplies Employing GaN Power Semiconductors and PCB-Integrated Magnetics”, IEEE CIPS, Germany, 2020
[APEC 2020]
P. Papamanolis, T. Guillod, F. Krismer, and J. W. Kolar, “Transient Calorimetric Measurement of Ferrite Core Losses”, IEEE APEC, USA, 2020
[ECCE Asia 2019]
P. Czyz, P. Papamanolis, T. Guillod, F. Krismer, and J. W. Kolar, “New 40kV/300kVA Quasi-2-Level Operated 5-Level Flying Capacitor SiC”Super-Switch" IPM", IEEE ECCE Asia, South Korea, 2018
[ECCE Asia 2018]
P. Czyz, T. Guillod, F. Krismer, and J. W. Kolar, “Exploration of the Design and Performance Space of a High Frequency 166kW/10kV SiC Solid-State Air-Core Transformer”, IEEE ECCE Asia, Japan, 2018
[COMPEL 2017]
T. Guillod, J. Huber, F. Krismer, and J. W. Kolar, “Litz Wire Losses: Effects of Twisting Imperfections”, IEEE COMPEL, USA, 2017
[APEC 2017]
T. Guillod, F. Krismer, and J. W. Kolar, “Electrical Shielding of MV/MF Transformers Subjected to High dv/dt PWM Voltages”, IEEE APEC, USA, 2017
[ECCE USA 2016]
T. Guillod, R. Färber, F. Krismer, C. M. Franck, and J. W. Kolar, “Computation and Analysis of Dielectric Losses in MV Power Electronic Converter Insulation”, IEEE ECCE, USA, 2016
[IECON 2015]
T. Guillod, F. Krismer, R. Färber, C. M. Franck, and J. W. Kolar, “Protection of MV/LV Solid-State Transformers in the Distribution Grid”, IEEE IECON, Japan, 2015
[APEC 2015]
D. Rothmund, G. Ortiz, T. Guillod, and J. W. Kolar, “10kV SiC-Based Isolated DC-DC Converter for Medium-Voltage-Connected SSTs”, IEEE APEC, USA, 2015
[ECCE USA 2014]
T. Guillod, J. Huber, G. Ortiz, A. De, C. M. Franck, and J. W. Kolar, “Characterization of the Voltage and Electric Field Stresses in Multi-Cell Solid-State Transformers”, IEEE ECCE, USA, 2014
[CIPS 2012]
T. Guillod, D. Gerber, J. Biela, and A. Müsing, “Design of a PCB Rogowski Coil Based on the PEEC Method”, IEEE CIPS, Germany, 2012
[PPC 2011]
D. Gerber, T. Guillod, and J. Biela, “IGBT Gate-Drive with PCB Rogowski Coil for Improved Short Circuit Detection and Current Turn-Off Capability”, IEEE PPC, USA, 2011

Further Scientific Contributions

[Workshop 2022]
T. Guillod and C. R. Sullivan, “Data-Driven Core-Loss Modeling”, ECPE Magnetic Components Workshop, France, 2022
[Workshop 2022]
C. R. Sullivan and T. Guillod, “Magnetic Core Geometry Influences on Component Performance”, PSMA Workshop, High Frequency Power Magnetics, USA, 2022
[Workshop 2021]
T. Guillod and J. W. Kolar, “ANN Powered Models for Magnetic Components”, ECPE Online Workshop, Steps towards Design Automation & Artificial Intelligence in Power Electronics, 2021
[Talk 2021]
J. W. Kolar, J. Huber, and T. Guillod, “Fundamentals and Application Oriented Evaluation of Solid State Transformer Concepts”, PSMA Webinar, Roadmap Presentation, 2021
[Talk 2020]
P. Czyz, T. Guillod, F. Krismer, and J.W. Kolar, “Experimental Analysis of a 166kW Medium Voltage/Frequency Air Core Transformer for 1:1 DCX Applications”, IEEC ECCE, USA, 2020
[Talk 2020]
T. Guillod and J. W. Kolar, “From Brute Force Grid Search to Artificial Intelligence: Which Algorithms for Magnetics Optimization?”, APEC PSMA Industry Session, USA, 2020
[Invention 2020]
P. Czyz, P. Papamanolis, V. Lazarevic, T. Guillod, F. Krismer, and J.W. Kolar, “Voltage Source Converter Configured to Transition Between at Least Two Voltage Levels”, Swedish patent application, 2020
[Workshop 2020]
P. Papamanolis, T. Guillod, F. Krismer, and J. W. Kolar, “Minimum Loss Operation of High Frequency Inductors”, ECPE Magnetic Components Workshop, France, 2020
[Article 2019]
D. Rothmund, T. Guillod, D. Bortis, and J. W. Kolar, “Use Electrical Energy More Efficiently with New Solid-State Transformers”, Swiss National Science Foundation NRP 70/71, 2019
[Talk 2019]
T. Guillod and J. W. Kolar, “Handling Design Space Diversity of Power Electronics Multi-Objective Optimization”, IEEE Design Automation for Power Electronics, Italy, 2019
[Talk 2019]
T. Guillod, D. Rothmund, and J. W. Kolar, “10kV SiC MOSFETs for Solid-State Transformers: Opportunities and Challenges”, X-Power Electronics Conference, China, 2019
[Workshop 2019]
T. Guillod and J. W. Kolar, “Dielectric Losses in the Insulation of Dry-Type Medium-Frequency Transformers”, ECPE Solid-State Transformer Workshop, Switzerland, 2019
[PhD 2018]
T. Guillod, “Modeling and Design of Medium-Frequency Transformers for Future Medium-Voltage Power Electronics Interfaces”, PhD Thesis, ETH Zurich, 2018
[Talk 2018]
D. Rothmund, T. Guillod, D. Bortis, and J. W. Kolar, “Design and Experimental Analysis of a 10kV SiC MOSFET Based 50kHz Soft-Switching Single-Phase 3.8kV AC/400V DC Solid-State Transformer”, IEEC ECCE, USA, 2018
[Workshop 2017]
T. Guillod, F. Krismer, and, J. W. Kolar, “Dielectric Losses: MV/MF Converter Insulation”, SCCER FURIES Technical Workshop, Switzerland, 2017
[Talk 2016]
T. Guillod and J. W. Kolar, “Medium-Frequency Transformers for Smart Grid Applications: Challenges and Opportunities”, SCCER-FURIES Annual Conference, Switzerland, 2016
[Poster 2015]
T. Guillod, R. Färber, C. M. Franck, and J. W. Kolar, “Effects of Mixed-Frequency Voltage Stress on Dry-Type Insulation Systems”, SCCER-FURIES Annual Conference, Switzerland, 2015
[Article 2013]
M. Pfeiffer, T. Guillod, M. Weber, and C. Franck, “Erhöhung der Übertragungskapazität durch Hybride AC/DC-Freileitungen, Potenzial und Machbarkeit in der Schweiz”, Bulletin SEV/AES Electrosuisse, 2013
[Poster 2013]
T. Guillod, “Simulation von AC/DC hybriden Freileitungen”, ETG-Innovationspreis, 2013
[Master 2013]
T. Guillod, “Simulation of AC/DC Hybrid Overhead Lines”, Master Thesis, ETH Zurich, 2013
[Talk 2012]
F. Kehl and T. Guillod, “Combined FEM and Analytical Method for the Simulation and Optimization of Planar Dielectric Waveguide Grating Biosensors”, Workshop on Numerical Methods for Optical Nano Structures, Switzerland, 2012

Awards & Grants

SNSF 2021
Swiss National Science Foundation Mobility Fellowship
IEEE JESTPE 2021
IEEE JESTPE Transactions Second Prize Award
IEEE JESTPE 2020
IEEE JESTPE Transactions First Prize Award
IEEE ECCE 2018
Best Paper Award
IEEE ECCE 2016
Travel Grant Award
IEEE IECON 2015
Best Presentation Recognition
IEEE IECON 2015
Travel Grant Award
IEEE ECCE 2014
Best Overall Oral Presentation
IEEE ECCE 2014
Best Overall Student Paper
ETG 2013
ETG-Innovationspreis Finalist (electrosuisse)

Open-Source Tools

2016 - 2021

Toolbox for power magnetics: model and optimization.

MATLAB, github.com/otvam/magnetic_components_toolbox_matlab

2019 - 2020

AI-mag - Inductor design with artificial neural networks and the finite element method.

Python/MATLAB/COMSOL, ai-mag.github.io

2019 - 2020

Toolbox for multi-objective optimization with genetic algorithm

MATLAB, github.com/ethz-pes/multi_objective_optimization_matlab

2016 - 2020

Computation of Litz wire losses with homogenized parameters

MATLAB/COMSOL, github.com/ethz-pes/litz_wire_homogenization_comsol_matlab

2016 - 2020

Computation of Litz wire losses with FEM and Bessel functions

MATLAB, github.com/ethz-pes/litz_wire_losses_fem_matlab

2016 - 2020

Toolbox for 2D magnetic simulation with the mirroring method

MATLAB, github.com/ethz-pes/mirroring_method_matlab

2015 - 2020

Library for importing and handling 2D and 3D FEM meshes

MATLAB, github.com/otvam/fem_mesh_matlab