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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

Small-Signal Model of a 5kW High-Output Voltage Capacitive-Loaded Series-Parallel Resonant DC-DC Converter

F.S. Cavalcante, +1 more
TL;DR: In this article, the authors presented an accurate method, based on first harmonic analysis, to derive the small-signal model of the series-parallel resonant DC-DC converter with capacitive output filter for highvoltage applications.
Proceedings ArticleDOI

Soft-switching techniques for medium-voltage isolated bidirectional DC/DC converters in solid state transformers

G. Ortiz, +3 more
TL;DR: The behavior of the internal charge dynamics in high-voltage semiconductors is analyzed, giving a clear base to understand the previously proposed zero-current-switching techniques for IGBT-based resonant dual-active-bridges.
Proceedings ArticleDOI

Shifting input filter resonances - An intelligent converter behavior for maintaining system stability

Mario Schweizer, +1 more
TL;DR: In this article, a new concept is presented as to how the power converter can shift filter resonances into an unproblematic frequency range by simulating an additional inductivity or capacity.
Journal ArticleDOI

Weight Optimization of a Cooling System Composed of Fan and Extruded-Fin Heat Sink

Christoph Gammeter, +2 more
- 01 Jan 2015 - 
TL;DR: In this article, the weight optimization of forced convection cooling systems, composed of a fan and an extruded-fin heat sink, required for a dc-dc converter of an airborne wind turbine system was investigated.
Journal ArticleDOI

Comparison of Performance and Realization Effort of a Very Sparse Matrix Converter to a Voltage DC Link PWM Inverter with Active Front End

S.D. Round, +5 more
- 01 May 2006 - 
TL;DR: In this paper, a comparison of the very sparse matrix converter (VSMC) and the back-to-back voltage DC-link converter (BBC) for a permanent magnetic synchronous motor drive application is made.