J
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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Journal ArticleDOI
All-SiC 9.5 kW/dm 3 On-Board Power Electronics for 50 kW/85 kHz Automotive IPT System
Roman Bosshard,Johann W. Kolar +1 more
TL;DR: In this article, the design of an on-board active rectifier and dc-dc converter for interfacing the receiver coil of a 50 kW/85 kHz IPT system is designed.
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Modeling and Comparison of Machine and Converter Losses for PWM and PAM in High-Speed Drives
TL;DR: In this article, the rotor, copper, and core losses of the machine as well as the inverter losses, taking the modulation type into account, were derived by considering two typical high-speed permanent magnet synchronous motor topologies driven by PAM and PWM converters.
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The New High-Efficiency Hybrid Neutral-Point-Clamped Converter
TL;DR: It is shown that, operating in the low converter dc-link voltage range, this new solution not only can achieve higher efficiency than many typical three-level structures but also can overcome their drawback of asymmetrical semiconductor loss distribution for some operating conditions.
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Accurate Transient Calorimetric Measurement of Soft-Switching Losses of 10-kV SiC mosfets and Diodes
TL;DR: In this article, the authors presented an accurate and reliable calorimetric method for the determination of soft-switching losses using the example of 10-kV SiC mosfet modules.
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Improving mains current quality for three-phase three-switch buck-type PWM rectifiers
TL;DR: In this article, an advanced modulation scheme is proposed which prevents the input current distortion and allows it to maintain the optimum performance of conventional modulation schemes, and the theoretical considerations are finally verified by measurements on a 5kW hardware prototype.