Johann W. Kolar
Loading...
1127 results
Search Results
Publications1 - 10 of 1127
- Modern and Intuitive Way of Teaching Space Vector Calculus and PWM in an Undergraduate CourseItem type: Conference Paper
Proceedings of the 2002 IEEE Power Conversion Conference (PCC 2002)Drofenik, Uwe; Kolar, Johann W. (2002) - Novel Three-Phase Electronic TransformerItem type: Journal Article
IEEE Transactions on Power ElectronicsMenzi, David; Yang, Aobo; Chhawchharia, Saransh; et al. (2024)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 FiltersItem type: Journal Article
IEEE Transactions on Power ElectronicsBiela, Jürgen; Wirthmüller, Alexander; Waespe, Roman; et al. (2009) - A Novel Method for On-Line Monitoring and Managing of Electrolytic Capacitors of DC Voltage Link PWM ConvertersItem type: Conference Paper
Official proceedings of the International Conference Power Electronics, Intelligent Motion, Power Quality : May 30 - June 1, 2006, Nürnberg, GermanyErtl, Hans; Edelmoser, Karl; Zach, Franz C.; et al. (2006) - Origin and Quantification of IncreasedCore Loss in MnZn Ferrite Plates of a Multi-Gap InductorItem type: Journal Article
CPSS Transactions on Power Electronics and ApplicationsNeumayr, Dominik; Bortis, Dominik; Kolar, Johann W.; et al. (2019) - Scaling and Design of Miniature High-Speed Bearingless Slice MotorsItem type: Journal Article
e & i Elektrotechnik und InformationstechnikSchuck, Marcel; Puentener, Pascal; Holenstein, Thomas; et al. (2019) - A High Torque, Wide Air Gap Bearingless Motor with Permanent Magnet Free RotorItem type: Conference Paper
2017 IEEE International Electric Machines and Drives Conference (IEMDC)Holenstein, Thomas; Greiner, Jonas; Steinert, Daniel; et al. (2017) - Analysis of Rotary Transformer Concepts for High-Speed ApplicationsItem type: Conference Paper
IEEE Applied Power Electronics Conference and Exposition. Conference ProceedingsBortis, Dominik; Fässler, Lukas; Looser, Andreas; et al. (2013) - MVAC-LVDC Hybrid and Solid-State Transformer Concepts for Future Data CentersItem type: Other Conference ItemHuber, Jonas; Wallmeier, Peter; Pieper, Ralf; et al. (2022)
- Extending winding capacitance cancellation to three-phase EMC input filter networksItem type: Conference Paper
IEEE International Symposium on Electromagnetic CompatibilityHeldwein, Marcelo L.; Kolar, Johann W. (2007)
Publications1 - 10 of 1127