Search Results - "Kolar, Johann W."

Applicability of Solid-State Transformers in Today's and Future Distribution Grids by Huber, Jonas E., Kolar, Johann W.

“…Solid-state transformers (SSTs) are power electronic converters that provide isolation between a medium-voltage and a low-voltage (LV) system using…”
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Efficiency-Optimized High-Current Dual Active Bridge Converter for Automotive Applications by Krismer, F., Kolar, J. W.

“…An efficiency-optimized modulation scheme and design method are developed for an existing hardware prototype of a bidirectional dual active bridge (DAB) dc/dc…”
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Multi-Objective Optimization of 50 kW/85 kHz IPT System for Public Transport by Bosshard, Roman, Kolar, Johann W.

“…Inductive power transfer (IPT) is an attractive solution for the automated battery charging of public transport electric vehicles (EVs) with low maintenance…”
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99% Efficient Isolated Three-Phase Matrix-Type DAB Buck-Boost PFC Rectifier by Schrittwieser, Lukas, Leibl, Michael, Kolar, Johann W.

“…Three-phase power factor correction rectifiers are an essential area of power electronics, supplying a direct current load with tens of kilowatts, or more,…”
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99% Efficient 10 kV SiC-Based 7 kV/400 V DC Transformer for Future Data Centers by Rothmund, Daniel, Guillod, Thomas, Bortis, Dominik, Kolar, Johann W.

“…The power supply chain of data centers from the medium voltage (MV) utility grid down to the chip-level voltage consists of many series connected power…”
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Design and Experimental Analysis of a Medium-Frequency Transformer for Solid-State Transformer Applications by Leibl, Michael, Ortiz, Gabriel, Kolar, Johann W.

“…Within a solid-state transformer, the isolated dc-dc converter and in particular its medium-frequency transformer are one of the critical components, as it…”
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Accurate Small-Signal Model for the Digital Control of an Automotive Bidirectional Dual Active Bridge by Krismer, Florian, Kolar, Johann W.

“…The derivation of an accurate small-signal model for a galvanically isolated, bidirectional dc-dc converter and the implementation of a corresponding…”
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Review of Three-Phase PWM AC-AC Converter Topologies by Kolar, J. W., Friedli, T., Rodriguez, J., Wheeler, P. W.

“…This paper presents first an overview of the well-known voltage and current dc-link converter topologies used to implement a three-phase PWM ac-ac converter…”
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Comprehensive Evaluation of Rectangular and Double-D Coil Geometry for 50 kW/85 kHz IPT System by Bosshard, Roman, Iruretagoyena, Ugaitz, Kolar, Johann W.

“…In this paper, the influence of the inductive power transfer (IPT) coil geometry on the performance factors efficiency, power density, and stray field is…”
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Artificial Neural Network (ANN) Based Fast and Accurate Inductor Modeling and Design by Guillod, Thomas, Papamanolis, Panteleimon, Kolar, Johann Walter

“…This paper analyzes the potential of Artificial Neural Networks (ANNs) for the modeling and optimization of magnetic components and, specifically, inductors…”
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Optimal ZVS Modulation of Single-Phase Single-Stage Bidirectional DAB AC-DC Converters by Everts, Jordi, Krismer, Florian, Van den Keybus, Jeroen, Driesen, Johan, Kolar, Johann W.

“…A comprehensive procedure for the derivation of optimal, full-operating-range zero voltage switching (ZVS) modulation schemes for single-phase, single-stage,…”
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Novel bidirectional universal 1‐phase/3‐phase‐input unity power factor differential AC/DC converter by Sarnago, Héctor, Lucía, Óscar, Chhawchharia, Saransh, Menzi, David, Kolar, Johann W.

“…A common 400 V dc bus for industrial motor drives advantageously allows the use of high‐performance 600 V power semiconductor technology in the inverter drive…”
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Advanced Cooling Methods for High-Speed Electrical Machines by Tuysuz, Arda, Meyer, Francesca, Steichen, Mathis, Zwyssig, Christof, Kolar, Johann W.

“…High-speed electrical machines are gaining increasing attention, as they enable higher power densities in several applications such as micromachining spindles…”
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Sinusoidal Input Current Discontinuous Conduction Mode Control of the VIENNA Rectifier by Leibl, Michael, Kolar, Johann W., Deuringer, Josef

“…During light load conditions unidirectional power factor correction rectifiers, such as the VIENNA rectifier, enter discontinuous conduction mode, causing the…”
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Analysis of High-Efficiency Three-Phase Two- and Three-Level Unidirectional Hybrid Rectifiers by Soeiro, T. B., Kolar, J. W.

“…This paper presents highly efficient three-phase high-power-factor hybrid rectifiers assembled by the parallel connection of a three-phase diode-bridge…”
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Modeling and Comparison of Machine and Converter Losses for PWM and PAM in High-Speed Drives by Schwager, Lukas, Tuysuz, Arda, Zwyssig, Christof, Kolar, Johann W.

“…For variable-speed drives, the interaction of the machine and the converter is becoming increasingly important, especially for high-speed applications, mainly…”
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Modulation and Control of a Three-Phase Phase-Modular Isolated Matrix-Type PFC Rectifier by Schrittwieser, Lukas, Cortes, Patricio, Fassler, Lukas, Bortis, Dominik, Kolar, Johann W.

“…Three-phase phase-modular isolated power factor correction rectifiers are an interesting alternative to phase-integrated three-phase rectifiers as matrix-type…”
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Optimal Design of LCL Harmonic Filters for Three-Phase PFC Rectifiers by Muhlethaler, J., Schweizer, M., Blattmann, R., Kolar, J. W., Ecklebe, A.

“…Inductive components such as line filter inductors or transformers occupy a significant amount of space in today's power electronic systems, and furthermore,…”
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An Active Magnetic Damper Concept for Stabilization of Gas Bearings in High-Speed Permanent-Magnet Machines by Looser, Andreas, Kolar, Johann W.

“…The successful application of ultrahigh-speed electrical-drive systems in industrial products is currently limited by lacking high-speed bearing technologies…”
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Experimental Analysis and Optimization of a Contactless Eddy-Current-Based Speed Sensor for Smooth Conductive Surfaces by Gong, Cheng, Tuysuz, Arda, Flankl, Michael, Stolz, Tibor, Kolar, Johann W., Habetler, Thomas

“…Speed sensing is an essential part in all closed-loop systems. There exist some situations in industry where the speed has to be measured without touching the…”
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