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Johann W. Kolar

Researcher at ETH Zurich

Publications -  1009
Citations -  44219

Johann W. Kolar is an academic researcher from ETH Zurich. The author has contributed to research in topics: Rectifier & Three-phase. The author has an hindex of 97, co-authored 965 publications receiving 36902 citations. Previous affiliations of Johann W. Kolar include Alstom & Infineon Technologies.

Papers
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Proceedings ArticleDOI

Three-Phase Bidirectional Buck-Boost Current DC-Link EV Battery Charger Featuring a Wide Output Voltage Range of 200 to 1000V

Daifei Zhang, +5 more
TL;DR: In this paper, the component stresses and design optimization of a two-stage three-phase bidirectional buck-boost current DC-link PFC rectifier system, realized solely with SiC power MOSFETs and conveniently requiring only a single magnetic component, are introduced.
Proceedings ArticleDOI

Comprehensive comparative evaluation of single- and multi-stage three-phase power converters for photovoltaic applications

Ralph M. Burkart, +2 more
TL;DR: In this paper, a comparative evaluation of selected three-phase single-and multi-stage voltage source inverters with rated power of 50kW for modular utility-scale PV plants is presented.
Journal ArticleDOI

Analysis of on- and off-line optimized predictive current controllers for PWM converter systems

Johann W. Kolar, +2 more
- 01 Jul 1991 - 
TL;DR: In this paper, the problem of on-off current control for coupling of a DC voltage system with a three-phase (polyphase) AC voltage system via a pulsewidth modulated (PWM) converter is discussed.
Journal ArticleDOI

Modulation and Control of a Three-Phase Phase-Modular Isolated Matrix-Type PFC Rectifier

Lukas Schrittwieser, +4 more
- 01 Jun 2018 - 
TL;DR: A detailed analysis of the operating principles and switching behavior of the converter is presented, showing that zero voltage switching can be achieved in the phase modules.
Journal ArticleDOI

Dielectric Losses in Dry-Type Insulation of Medium-Voltage Power Electronic Converters

Thomas Guillod, +5 more
- 01 Sep 2020 - 
TL;DR: In this article, the authors analyzed the modeling and the computation of dielectric losses with pulsewidth modulated (PWM) voltages and proposed scalable analytical expressions for the losses produced by PWM voltages.