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Johann W. Kolar

Johann W. Kolar

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Electronics and Electrical Engineering
Switzerland
2026

D-Index & Metrics

Electronics and Electrical Engineering

D-Index
121
Citations
59669
World Ranking
61
National Ranking
3

Research.com Recognitions

  • 2026 - Research.com Electronics and Electrical Engineering in Switzerland Leader Award
  • 2025 - Research.com Electronics and Electrical Engineering in Switzerland Leader Award
  • 2022 - Research.com Electronics and Electrical Engineering in Switzerland Leader Award
  • 2016 - IEEE William E. Newell Power Electronics Award For contributions to the advancement of three-phase pulse-width modulation (PWM) converter systems and power electronics education.

Overview

Johann W. Kolar is affiliated with ETH Zurich in Switzerland and has contributed extensively to the field of engineering, particularly within electrical and electronic engineering. Their academic output includes 314 publications targeting advanced research topics in engineering. The subfields of study include electrical and electronic engineering, control and systems engineering, biomedical engineering, mechanical engineering, and automotive engineering.

Their research covers several main topics, with significant work on advanced DC-DC converters, multilevel inverters and converters, silicon carbide semiconductor technologies, magnetic bearings and levitation dynamics, microgrid control and optimization, and electromagnetic compatibility and noise suppression, alongside advanced battery technologies research.

Recent notable papers by Kolar include:

  • "Artificial Neural Network (ANN) Based Fast and Accurate Inductor Modeling and Design," 2020, IEEE Open Journal of Power Electronics
  • "Three Levels Are Not Enough: Scaling Laws for Multilevel Converters in AC/DC Applications," 2020, IEEE Transactions on Power Electronics
  • "New Figure-of-Merit Combining Semiconductor and Multi-Level Converter Properties," 2020, IEEE Open Journal of Power Electronics
  • "Monolithic Bidirectional Power Transistors," 2023, IEEE Power Electronics Magazine
  • "Comparative Evaluation of a Full- and Partial-Power Processing Active Power Buffer for Ultracompact Single-Phase DC/AC Converter Systems," 2020, IEEE Journal of Emerging and Selected Topics in Power Electronics

Their work has been published in frequent venues such as:

  • IEEJ Transactions on Electrical and Electronic Engineering
  • IEEE Transactions on Power Electronics
  • IEEE Open Journal of Power Electronics
  • IEEE Journal of Emerging and Selected Topics in Power Electronics
  • Electronics

Kolar has collaborated repeatedly with several co-authors, including Jonas Huber, Dominik Bortis, David Menzi, Narendra Ahuja, and Frede Blaabjerg.

The scientist received the IEEE William E. Newell Power Electronics Award in 2016 for contributions related to the advancement of three-phase pulse-width modulation (PWM) converter systems and power electronics education.

Best Publications

  • Design and Implementation of a Highly Efficient Three-Level T-Type Converter for Low-Voltage Applications

    M. Schweizer;J. W. Kolar

  • An Isolated Three-Port Bidirectional DC-DC Converter With Decoupled Power Flow Management

    Chuanhong Zhao;S.D. Round;J.W. Kolar

  • SiC versus Si—Evaluation of Potentials for Performance Improvement of Inverter and DC–DC Converter Systems by SiC Power Semiconductors

    J Biela;M Schweizer;S Waffler;J W Kolar

  • A novel three-phase utility interface minimizing line current harmonics of high-power telecommunications rectifier modules

    J.W. Kolar;F.C. Zach

  • Efficiency-Optimized High-Current Dual Active Bridge Converter for Automotive Applications

    F. Krismer;J. W. Kolar

  • Influence of the modulation method on the conduction and switching losses of a PWM converter system

    J.W. Kolar;H. Ertl;F.C. Zach

  • The essence of three-phase PFC rectifier systems

    Johann W. Kolar;Thomas Friedli

  • A Review of Control and Modulation Methods for Matrix Converters

    Jose Rodriguez;Marco Rivera;Johan W. Kolar;Patrick W. Wheeler

  • The Essence of Three-Phase PFC Rectifier Systems—Part II

    Thomas Friedli;Michael Hartmann;Johann W. Kolar

  • Review of Three-Phase PWM AC–AC Converter Topologies

    J. W. Kolar;T. Friedli;J. Rodriguez;P. W. Wheeler

  • Closed Form Solution for Minimum Conduction Loss Modulation of DAB Converters

    F. Krismer;J. W. Kolar

  • PWM Converter Power Density Barriers

    Johann W. Kolar;Uwe Drofenik;Juergen Biela;Marcelo Heldwein

  • Core Losses Under the DC Bias Condition Based on Steinmetz Parameters

    J. Muhlethaler;J. Biela;J. W. Kolar;A. Ecklebe

  • Novel Three-Phase AC–AC Sparse Matrix Converters

    J.W. Kolar;F. Schafmeister;S.D. Round;H. Ertl

  • Improved Core-Loss Calculation for Magnetic Components Employed in Power Electronic Systems

    J. Muhlethaler;J. Biela;J. W. Kolar;A. Ecklebe

  • Accurate Power Loss Model Derivation of a High-Current Dual Active Bridge Converter for an Automotive Application

    F. Krismer;J.W. Kolar

  • Comparative Evaluation of Advanced Three-Phase Three-Level Inverter/Converter Topologies Against Two-Level Systems

    M. Schweizer;T. Friedli;J. W. Kolar

  • Accurate Small-Signal Model for the Digital Control of an Automotive Bidirectional Dual Active Bridge

    F. Krismer;J.W. Kolar

  • Optimal ZVS Modulation of Single-Phase Single-Stage Bidirectional DAB AC–DC Converters

    Jordi Everts;Florian Krismer;Jeroen Van den Keybus;Johan Driesen

  • Analytical calculation of the RMS current stress on the DC-link capacitor of voltage-PWM converter systems

    J.W. Kolar;S.D. Round

  • Comparative Evaluation of Three-Phase AC–AC Matrix Converter and Voltage DC-Link Back-to-Back Converter Systems

    T. Friedli;J. W. Kolar;J. Rodriguez;P. W. Wheeler

Frequent Co-Authors

Dominik Bortis
Dominik Bortis ETH Zurich
Jurgen Biela
Jurgen Biela ETH Zurich
S.D. Round
S.D. Round ETH Zurich
Thomas Friedli
Thomas Friedli ABB (Switzerland)
Marcelo L. Heldwein
Marcelo L. Heldwein Technical University of Munich
Jose Rodriguez
Jose Rodriguez San Sebastián University
Patrick Wheeler
Patrick Wheeler University of Nottingham

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