Johann W. Kolar

Last Name

Kolar

First Name

Johann W.

ORCID

0000-0002-6000-7402

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Publications1 - 10 of 1127

Modern and Intuitive Way of Teaching Space Vector Calculus and PWM in an Undergraduate Course
Drofenik, Uwe; Kolar, Johann W. (2002)
Proceedings of the 2002 IEEE Power Conversion Conference (PCC 2002)
Novel Three-Phase Electronic Transformer
Menzi, David; Yang, Aobo; Chhawchharia, Saransh; et al. (2024)
IEEE Transactions on Power Electronics
Electronic transformers enable galvanic isolation and voltage level adaption at high frequency, and thus the magnetic core volume and weight can be reduced substantially compared to traditional transformers operating at the grid frequency. This article introduces a novel phase-modular single-stage three-phase electronic transformer (3Φ-ET) which advantageously enables the use of standard power transistors with unipolar voltage blocking capability. The output frequency is identical to the grid input frequency and the bidirectional power flow can be adjusted by means of a simple dual active bridge (DAB)-type modulation which results in inherently sinusoidal grid currents. The 3Φ-ET is thoroughly described and experimental waveforms with a 6 kW prototype system operated in a 400 V (rms, line-line) three-phase grid provide a proof of concept and verify the theoretical considerations.
Passive and Active Hybrid Integrated EMI Filters
Biela, Jürgen; Wirthmüller, Alexander; Waespe, Roman; et al. (2009)
IEEE Transactions on Power Electronics
A Novel Method for On-Line Monitoring and Managing of Electrolytic Capacitors of DC Voltage Link PWM Converters
Ertl, Hans; Edelmoser, Karl; Zach, Franz C.; et al. (2006)
Official proceedings of the International Conference Power Electronics, Intelligent Motion, Power Quality : May 30 - June 1, 2006, Nürnberg, Germany
Origin and Quantification of IncreasedCore Loss in MnZn Ferrite Plates of a Multi-Gap Inductor
Neumayr, Dominik; Bortis, Dominik; Kolar, Johann W.; et al. (2019)
CPSS Transactions on Power Electronics and Applications
Scaling and Design of Miniature High-Speed Bearingless Slice Motors
Schuck, Marcel; Puentener, Pascal; Holenstein, Thomas; et al. (2019)
e & i Elektrotechnik und Informationstechnik
A High Torque, Wide Air Gap Bearingless Motor with Permanent Magnet Free Rotor
Holenstein, Thomas; Greiner, Jonas; Steinert, Daniel; et al. (2017)
2017 IEEE International Electric Machines and Drives Conference (IEMDC)
Analysis of Rotary Transformer Concepts for High-Speed Applications
Bortis, Dominik; Fässler, Lukas; Looser, Andreas; et al. (2013)
IEEE Applied Power Electronics Conference and Exposition. Conference Proceedings
MVAC-LVDC Hybrid and Solid-State Transformer Concepts for Future Data Centers
Huber, Jonas; Wallmeier, Peter; Pieper, Ralf; et al. (2022)
Extending winding capacitance cancellation to three-phase EMC input filter networks
Heldwein, Marcelo L.; Kolar, Johann W. (2007)
IEEE International Symposium on Electromagnetic Compatibility

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Johann W. Kolar

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