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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Proceedings ArticleDOI
Design and Comparison of Permanent Magnet Self-Bearing Linear-Rotary Actuators
TL;DR: Fundamental scaling laws concerning achievable axial forces and torques of linear and rotary machines with interior and exterior rotor arrangement are derived, enabling a qualitative comparison in order to figure out the most suitable actuator concept.
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Analysis and Modeling of Eddy-Current Couplings for Auxiliary Power Generation on a Freight Train Wagon
TL;DR: In this article, a non-coaxial eddy-current coupling was proposed for a freight train wagon for generating auxiliary power in the range of several Watts. But the authors only used a wheel with radially magnetized permanent magnets to extract kinetic energy when the train was in motion.
Proceedings ArticleDOI
Multivariable state feedback control of a 500 000 rpm self-bearing motor
TL;DR: In this paper, a multivariable rotor position control scheme is proposed for magnetically-levitated electrical drive systems, which enables applying linear state feedback control without linearization of bearing actuators.
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Analysis of the Influence of Measurement Circuit Asymmetries on Three-Phase CM/DM Conducted EMI Separation
TL;DR: In this paper, the authors theoretically analyzed and experimentally proven that asymmetries in the EMI test setup result in an unwanted conversion between CM and DM EMI noise, and therefore significantly influence the CM/DM EMI separation.
Proceedings ArticleDOI
Gate signal jitter elimination and noise shaping modulation for high-SNR Class-D power amplifiers
TL;DR: In this article, a jitter elimination technique for the transistor gate signals in power electronic converters is presented and verified, which enables half-bridge output voltage SNR values of more than 100dB in an open-loop system.