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Konferenzveröffentlichung
Unsymmetrische Beiträge zur Momentanreserve durch Erzeugung, Verbrauch und Speicher
(Conexio-PSE GmbH, 2022)
Im Zuge der Dekarbonisierung müssen Verbundsysteme auf wiederkehrende Situationen vorbereitet werden, während derer sie vor allem aus Wechselrichtern gespeist werden. Der stabilisierende Einfluss der durch Synchrongeneratoren direkt an das Netz gekoppelten Schwungmassen auf jede Frequenzveränderung ist heute unverzichtbar. Die inhärente Sofortreaktion von Synchronmaschinen auf Spannungswinkeländerungen und Frequenzbewegungen heißt Momentanreserve. Wenn sich Verbrauch oder Erzeugung dynamisch ändern, und besonders ...
Konferenzveröffentlichung
Designing a Conversational Agent as a Formative Course Evaluation Tool
(GITO Verlag, 2020)
Today’s graduating students face ever-changing environments when they enter their job life. Educational institutions must therefore continuously develop their course structure and content in order to prepare their students to be future employees. A very important means for developing the courses is the students’ course evaluations. Due to financial and organizational restrictions, these course evaluations are usually carried out quantitatively and at the end of the semester. However, past research has shown that this ...
Konferenzveröffentlichung
The Effect of Injection Molding Parameters on Microcellular Foam Morphology
(2021)
Microcellular foam injection molding with physical blowing agent (MuCell®) delivers monetary benefits, processing advantages and freedom of product design by reducing shrinkage. In conjunction with an advanced mold technology, so-called Pull and Foam method, there is great potential in controlling the foam structure of the component locally. In this study, Polycarbonate (PC) components were produced with nearly compact outer skin and a closed cellular core. To understand the relation between processing parameters and ...
Konferenzveröffentlichung
The Bicycle, a climate change mitigation tool in Latin America
(Kassel, Universität Kassel, Fachbereich Bauingenieur- und Umweltingenieurwesen, Fachgebiet Radverkehr und Nahmobilität, 2022)
Konferenzveröffentlichung
Sustainability in traffic systems: Indicators for a systemic view in science an planning
(Kassel, Universität Kassel, Fachbereich Bauingenieur- und Umweltinsgenieurwesen, Fachgebiet Radverkehr und Nahmobilität, 2022)
Konferenzveröffentlichung
Interleaved Buck Converter with Coupled Inductors as Auxiliary Bias-Current Source for Controllable Magnetic Devices
(VDE Verlag, 2020-08-26)
This paper presents an Interleaved Buck Converter with Coupled Inductors as a DC-Bias Current Source for Controllable Magnetic Devices, the modular interleaved Buck system supplies a low-ripple current for the auxiliary DC-bias winding of a controllable inductor with different biasing winding disposition in relationship with the main operating flux of the inductor. A 4-phase interleaved Buck converter system was built and inductance measurements where made for different operating current values of the DC-bias and the ...
Konferenzveröffentlichung
A Conversational Agent to Improve Response Quality in Course Evaluations
(Association for Computing Machinery, 2020)
Recent advances in Natural Language Processing (NLP) bear the opportunity to design new forms of human-computer interaction with conversational interfaces. We hypothesize that these interfaces can interactively engage students to increase response quality of course evaluations in education compared to the common standard of web surveys. Past research indicates that web surveys come with disadvantages, such as poor response quality caused by inattention, survey fatigue or satisficing behavior. To test if conversational ...
Konferenzveröffentlichung
A GaN-based DC/DC converter for e-vehicles applications
(IEEE, 2020)
This paper presents a 4 kW GaN-based galvanically isolated bidirectional DC/DC converter suitable for on-board auxiliary power supply systems, interconnecting the HV battery with the LV power system. To enable the trend towards higher levels of electrification, a second LV level of 48 V is introduced to supply the high-power consumers, relieving the 12 V grid on the one hand and/or avoiding using additional costly isolated converters connected to the HV batteries on the other. The built converter prototypes aim to ...
Konferenzveröffentlichung
Referring nouns in name-informing quotation: A copula-based approach
(Universität OsnabrückenHumboldt-Universität zu Berlin, 2020)
In name-informing constructions like "The phenomenon is called a “sun halo”", the noun mentioned in the quotation (a “sun halo”) adopts a referring interpretation, as indicated by the determiner. As an account, we claim predicates like call to introduce a copular relation, which is the source of referring uses of nominals in name-informing quotation: To call y “n” entails that y is an n. Two copula types are argued to be covertly contained in name-informing constructions, an identificational copula and an equative ...
Konferenzveröffentlichung
Impact of implementation of auxiliary bias-windings on controllable inductors for power electronic converters
(IEEE, 2020)
Magnetic devices are an important part of electronic converters. They can be used to control some properties of the converters. There are three different control methods using an auxiliary bias-winding. In the presented paper, the impact of the implementation of the auxiliary bias-winding was studied for mixed biasing. Seven different designs were investigated in small signal measurements and 3D-FEM-simulations. The results were proven by calculated results of equivalent diagram circuits, which have been developed. ...