05. - 07.06.2018
Power Electronics | Intelligent Motion | Renewable Energy | Energy Management
Wednesday, 06.06.2018, 15:15 - 17:30 hrs
Jacques Laeuffer, Dtalents, F
Reducing the dv/dt of Motor Inverters by a Two Leg Resonant Switching Cell
Nominated for the Best Paper Award
Nominated for the Young Engineer Award
A concept for reducing the output dv/dt of SiC PWM motor inverters, which keeps high semiconductor switching speed is presented and analyzed. This is achieved by splitting up each phase leg into two legs which are gated slightly time delayed against each other and combining the output voltages by an interphase transformer. The stray inductance of this transformer in combination with an additional capacitor forms a resonant circuit which shows a cosine edge shaped output (motor) voltage at low dv/dt rates for a properly operation
SiC 2.5 MHz Switching Mode Resonant Halfbridge Inverter
We demonstrate a switching mode resonant halfbridge inverter with SiC-MOSFETs and an operating frequency of 2.5 MHz. The SiC-MOSFETs are IXFN50N120SIC from IXYS. The inverter operates in zero voltage switching mode (ZVS) and we present the design and measurements on a prototype. The losses are discussed with a loss model and related to different components, i.e. gate driver losses, losses of Rds(on) and the resonance circuit. The prototype achieves a high conversion efficiency above 95 %.
Analysis and Design of a Multilayer DC Bus With Low Stray Impedance and Homogenous Current Distribution
The aim of this work is to design a DC bus for silicon carbide power inverter. This converter works at high voltage and current levels with high frequencies signals, so a DC bus design with low impedance is necessary. Moreover, current has to flow homogeneously to avoid imbalances between bus capacitors. Theory of semiconductor parallelization has been applied in order to get a modular bus structure where the design symmetry and mutual coupling effect of layers produce a current balance over copper areas of the DC bus.
Replacing Si-IGBTs with SiC-MOSFETs in Low Voltage Grid Converters
For low voltage, medium power grid converters two competitive converter technologies are available: state-of-the-art Silicon IGBTs and new SiC MOSFETs. For a comparison of the technologies, two available power modules with same package and similar ratings are examined in a 3-phase VSI. The effort of the SiC converter development is minimized by the replacement of the IGBTs by the SiC MOSFETs. A comparison shows that for the same efficiency at rated power the SiC converter can operate with 5 times the switching frequency of the IGBT converter.
A Polymer Optical Fiber Bus for Power Electronic Applications
This work focuses on the design and the implementation details of a Polymer Optical Fiberbased communication network for power electronic devices. For this purpose, first therequirements needed in this area are presented in detail. Afterwards the design challengesand the implementation of specific components such as the optical splitter and transmittercircuit are shown and discussed regarding their characteristics in the industrial environment.
High-Inductive Zero-Voltage Commutations within Active-Neutral Point-Clamped Inverters
Improved three-level active neutral point clamped inverters allow an inductance between the upper and the lower half of the inverter. The failure current di/dt during the short is limited. But this protection inductance results in a high-inductive zero-voltage switching of the semiconductor. These switching conditions are unusual for high-voltage devices. Within this paper the behavior during switching of the semiconductor is described with the help of measurements and device simulations.
A SiC-based 15-Level Power Inverter for the Generation of Variable High Frequency Output Voltages
A novel 15-level power inverter for the generation of variable high frequency output voltages is presented. The system, which can be used for the testing of inductive or capacitive components, is capable to generate output voltage waveforms up to 900 V and 50 kHz at 100 A in continuous and 200 A in pulsed operation. This results in an output apparent power of 40 kVA in continuous and up to 80 kVA in pulsedoperation. The setup, control strategy and measurement results are presented.
Loss Optimization for 48 Volt High Current Inverter
To realize high power levels in a 48 volt system, the inverter must be capable of providing very high current levels, while maintaining high efficiency and power density. Purpose of this work is the optimization of a low-voltage high power inverter. Switching losses of high current devices are investigated by means of different simulation methods and measurement. Together with the consideration of conduction losses, trade-offs will be highlighted, and an optimized design will be presented.
Common- and Differential-Mode Separators Including the FM Broadcasting Band
Nominated for the Young Engineer Award
Noise reduction techniques depend on the propagation mode (Common mode (CM) or differential mode (DM)). Hence, the separation between CM and DM within measurements is essential. In SiC based power electronics, the electromagnetic emission increases significantly at frequencies above 10MHz. A CM/DM separator is a low-cost wideband and non-invasive laboratory equipment. In this paper implementation and design issues of CM/DM separators for the frequency range up to 110MHz are presented.
Accurate Self-Identification of Inverter Nonlinear Effects in AC Drives
This paper presents a novel self-identification method which characterises accurately the nonlinear voltage distortions of a voltage source inverter. The proposed method requires no additional test equipment and no position sensor which makes it together with its simplicity andhigh accuracy particullary suitable for industrial applications.
Helmut Schmidt University Hamburg, Hamburg, Deutschland
Sebastian Fahlbusch studied electrical engineering at the Hamburg University of Technology (TUHH) and received the Dipl.-Ing. degree in electrical engineering in 2011. He is currently working as a research fellow at the Helmut Schmidt University (University of the Federal Armed Forces Hamburg), Hamburg, Germany, where he is working toward doctoral thesis concerning silicon carbide power devices and multilevel converter.
Technical University of Vienna, Wien, Österreich
Thomas Fuchslueger studied Electrical Engineering at TU Wien, Vienna Austria, with focus on Automation Engineering/Power Electronics. He currently is working on the research project for optimizing traction converter systems.
Siemens, München, Deutschland
Marek Galek has graduated from University in 2009 with a degree in engineering for Electrical and Digital Technology (M.Sc.). He is currently employed as a research engineer at the Siemens Corporate Technologies for Power Electronics in Munich, Germany. His areas of expertise are modular converters and digital control of power electronic systems.
Universiy of the Federal Armed Forces Munich, Neubiberg, Deutschland
Matthias Ippisch studied Electrical Engineering at the Friedrich-Alexander-University Erlangen-Nuremberg. Since 2015 he is research assistant at the Chair of Electrical Drives and Actuators at the University of Federal Defense Munich. Currently he is working on the optimization of low-voltage high-current inverters for automotive drive applications.
Technical University of Berlin, Berlin, Deutschland
Marius Kaufmann-Bühler received his M.Sc. in electrical engeneering at Technische Universität Berlin TU Berlin in 2017. Now he is a member of the research group of power electronics in the institute of energy and automation technology of TU Berlin. In his research he focuses on wide bandgap power semiconductors in grid converters.
University of Rostock, Rostock, Deutschland
Felix Kayser studied Electrical Engineering at University of Rostock. He received his Dipl.-Ing. in 2017 and is now working as research assistant at the institute of Electrical Power Engineering at University of Rostock. His research interests are high-voltage semiconductors.
University of the Basque Country (UPV/EHU), Bilbao, Spanien
Since December 2013, he is a telecommunication engineer from the University of the Basque Country, Spain. Nowadays, he is working as a researcher in this university developing his PhD thesis. By this time, he has published several articles in national and international congresses and has collaborated in different research projects, as a member of the Electronics Department of the Faculty of Engineering of Bilbao.
ISEA RWTH Aachen, Aachen, Deutschland
Karl Oberdieck received his M.Sc. degree in electrical engineering from RWTH Aachen University, Aachen, Germany, 2013. Since February 2014 he has been working towards a Ph.D. degree in the Institute for Power Electronics and Electrical Drives (ISEA). His research interests include design of power electronic converters, EMI issues and modeling in particular for electric vehicle traction applications.
Karlsruhe Institute of Technology, Karlsruhe, Deutschland
Christoph Simon is Diplom-Ingenieur in Electrical Engineering and Information Technology. He studied at the Karlsruhe Institute of Technology and finished 2013 with a diploma thesis about an active three-phase rectifier with SiC-MOSFETs and space vector modulation for power factor correction. He is now a PhD student at the Light Technology Institute at the Karlsruhe Institute of Technology and researches electronic ballasts for inductively coupled plasmas.
MACCON GmbH, München, Deutschland
Simon Wiedemann received the M.Sc. degree in 2014 from the University of Newcastle-Upon-Tyne, Newcastle, United Kingdom. He is currently working toward the Dr.-Ing. degree in the Institute for Electrical Drive Systems and Power Electronics at the Technical University Munich (TUM), Munich, Germany as a Marie-Curie Research Scholar. He holds also a position in the Research and Development Department at MACCON GmbH, Munich, Germany. His research interests are Self-Commissioning, Characterisation and Optimal Control of AC Machines.