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Bidirectional Isolated Non-Resonant DAB DC-DC Converter for Ultra-Wide Input Voltage Range Applications
(2014)2014 International Electronics and Application Conference and Exposition (PEAC 2014)Conference Paper -
Weight Optimization of a Machine for Airborne Wind Turbines
(2014)IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics SocietyConference Paper -
Analysis and practical relevance of CM/DM EMI noise separator characteristics
(2014)2014 16th European Conference on Power Electronics and Applications (EPE'14-ECCE Europe)This Paper details two different contributions related to practical CM/DM EMI measurements. A first part investigates sources and implications of measurement errors that result for CM/DM separators in a practical measurement environment with a particular focus on the recently presented input impedance criterion for CM/DM separators. Furthermore, the realization of an active CM/DM separator, which features competitive separation capabilities ...Conference Paper -
η-ρ Pareto optimization of 3-phase 3-level T-type AC-DC-AC converter comprising Si and SiC hybrid power stage
(2014)2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)In this paper, the η-ρ (efficiency - power density) Pareto front of a 20 kVA Uninterruptible Power Supply (UPS), comprising a Si and SiC hybrid 3-level T-type rectifier and inverter stage, and input / output side filters, is determined. A multi-objective optimization procedure is detailed, which employs an electrical converter model and coupled electro-thermal component models. Each component model determines the corresponding losses, ...Conference Paper -
Control method for Inductive Power Transfer with high partial-load efficiency and resonance tracking
(2014)2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)Frequency controlled Inductive Power Transfer (IPT) systems for Electric Vehicle (EV) battery charging applications often suffer from high power losses in partial-load, because the transmitter coil current is not significantly reduced at low output power. Therefore, in this paper a novel control method is presented that exhibits a substantially higher partial-load efficiency, while it also enables full control of the power semiconductor ...Conference Paper -
Optimal inductor design for 3-phase voltage-source PWM converters considering different magnetic materials and a wide switching frequency range
(2014)2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)In this paper, an optimization regarding volume, efficiency and costs of AC boost inductors in 3-phase PWM converters based on detailed multi-domain models is presented. The optimization is performed for a wide switching frequency range of 5-80 kHz and a wide current ripple range of 5-100 %, considering ferrite, amorphous and powder core materials in combination with round, litz, foil and flat wire windings. The shown analysis and ...Conference Paper -
Concept and experimental evaluation of a novel DC- 100MHz wireless oscilloscope
(2014)2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)A wireless oscilloscope featuring 100 MHz analog bandwidth and ultra-high isolated measurement channels is presented in this paper. In order to visualize the benefits of this potential-free measurement system, the paper starts with a revision of commonly utilized isolated voltage and current measurement concepts.With a clear understanding of the benefits given by a high-bandwidth, high-isolated and highly common mode immune measurement ...Conference Paper -
Common-mode currents in multi-cell Solid-State Transformers
(2014)2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)Solid-State Transformers (SSTs) are considered important building blocks of a future Smart Grid, where they will replace conventional transformers and provide enhanced functionality and controllability. To deal with the medium-voltage levels at the input of an SST for distribution applications, commonly cascaded cells converter topologies are proposed. This paper presents a detailed analysis of the common-mode currents appearing in cascaded ...Conference Paper -
Integrated isolation and voltage balancing link of 3-phase 3-level PWM rectifier and inverter systems
(2014)2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)For a 3-phase pulse width modulated high-bandwidth AC voltage source, this paper presents a series resonant DC-DC converter (SRC) with a high-frequency transformer operated by only two half-bridges interconnecting a 3-phase 3-level rectifier and 3-phase plus neutral conductor 3-level inverter stage. On the primary side, one terminal of the transformer is connected through the resonant capacitor and inductor to one bridge-leg output and ...Conference Paper -
Performance comparison of a GaN GIT and a Si IGBT for high-speed drive applications
(2014)2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)GaN power switches enable better switching characteristics compared to state-of-the-art power transistors that are widely used today. Due to their lower switching losses, GaN switches may lead to new horizons in key application areas of power electronics such as photovoltaic converters, high-speed electrical drives and contactless power transfer. However, this technology has not yet diffused fully into the industry. Therefore, today only ...Conference Paper