@misc{12032, abstract = {{As DC grids become more widespread in industry, the demand for DC industry-compliant power supplies is increasing. This paper describes the design and analysis of a SiC-based Active-Front-End with a switching frequency of 100 kHz and an output power of 50 kW. The focus of this Active-Front-End is on the small input inductance (uk=0,6%), which has been deliberately reduced in order to reduce package size. For a small inductance a high switching frequency and a fast and precise current measurement are basic requirements. The increase of the switching frequency reduces the size of the whole filter.}}, author = {{Otte, Raphael and Koch, Jan-Niklas and Borcherding, Holger and Stuckmann, Tim}}, booktitle = {{PCIM Europe : International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 11-13 June 2024, Nuremberg}}, isbn = {{978-3-8007-6262-0}}, keywords = {{DC-Industry, DC-Grids, AIC, AFE, Active-Infeed-Converter, Active-Front-End}}, location = {{Nürnberg}}, pages = {{3402}}, publisher = {{VDE Verlag}}, title = {{{Design and Analysis of a 50kW SiC-based Active-Front-End with a very small line choke for DC-Grids}}}, year = {{2024}}, } @misc{12284, abstract = {{Due to the increasingly widespread use of efficient power electronics, DC grids offer more and more advantages over AC grids. In the field of energy supply the use of DC technology is also growing and is state of the art in offshore, high-voltage, vehicle and data center applications. The spread of industrial open DC grids is currently starting and is completely different due to the requirements and the specifics of certain industrial applications such as conductor systems, e.g. monorail conveyer or rack feeder systems. This paper investigates multi feed in operation in industrial DC conductor systems, especially for transitions between loaded and load free conductor segments. For this purpose, a test bench consisting of two conductor segments is developed. Each segment is individually fed by an infeed converter. The transitions between segments will be analyzed regarding control behavior and stability.}}, author = {{Koch, Jan-Niklas and Otte, Raphael and Stuckmann, Tim and Warkentin, Slavi and Borcherding, Holger}}, booktitle = {{PCIM Europe 2024 International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}}, isbn = {{ 978-3-8007-6262-0}}, location = {{Nürnberg}}, pages = {{PP194}}, publisher = {{VDE Verlag}}, title = {{{Investigation of Load Transitions Between Loaded and Load Free Conductor Segments in Industrial Conductor Systems}}}, doi = {{10.30420/566262317}}, year = {{2024}}, } @misc{10405, abstract = {{Due to the increasingly widespread use of efficient power electronics, DC grids today offer more and more advantages over AC grids. In the field of energy supply, the use of DC technology is also growing and is state of the art in offshore, high-voltage, vehicle and data center applications. The spread of industrial open DC grids is currently starting and is completely different due to the requirements. The DC links of each device are connected directly and the capacitors of individual devices shall not be overloaded. Especially not by ripple currents from other devices. The paper describes the easy use of a measuring box which evaluates and optically displays the load of electrolytic capacitors. No further measuring equipment is required. The simple, temporary integration into a grid makes it easy to check whether capacitors of individual devices are overloaded, and their lifetime is limited.}}, author = {{Koch, Jan-Niklas and Puls, Simon and Borcherding, Holger and Warkentin, Slavi}}, booktitle = {{ größer Mesago Messe Frankfurt GmbH, Stuttgart (Hrsg.) PCIM Europe 2023 International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}}, location = {{Nürnberg}}, pages = {{PP060}}, publisher = {{VDE Verlag}}, title = {{{Conceptual Design of a Portable Measuring Box for Monitoring Ripple Currents affecting the Lifetime of Electrolytic Capacitors in Industrial Open DC Grids}}}, doi = {{10.30420/566091166}}, year = {{2023}}, } @misc{8432, abstract = {{In this paper a highly efficient three-phase power factor correction (PFC) converter is used as an active infeed converter (AIC) for an industrial DC conductor system. The DC grid is a monorail conveyer system with distributed DC link capacitors and intelligent energy storages alongside the conductor. The operation of the system, using voltage droop control for proper load distribution, is investigated. The power consumption of the proposed DC grid will be compared to a conventional AC grid with identical drives. The used active infeed converter operates at 100kHz and 650V nominal DC bus voltage with a nominal power of 5kW.}}, author = {{Koch, Jan-Niklas and Otte, Raphael and Borcherding, Holger}}, booktitle = {{PCIM Europe 2022 : International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management : 10-12 May 2022 }}, isbn = {{978-3-8007-5822-7 }}, location = {{Nürnberg}}, pages = {{1983}}, publisher = {{VDE Verlag}}, title = {{{Operation of a SiC-Based Three-Phase PFC Converter in an Industrial DC Conductor System with Distributed DC Link Capacitors}}}, doi = {{10.30420/565822183}}, year = {{2022}}, } @misc{8433, abstract = {{Today DC offers far-reaching advantages over AC. Therefore, many devices have been equipped with an internal DC link for many years. In the field of energy supply, the use of DC technology is also growing and is state of the art in offshore, high-voltage, vehicle and data center applications. The spread of industrial open DC grids is currently starting and is completely different due to the requirements: The industrial DC grid is highly dynamic. This means that power varies greatly over time and therefore there is a large amount of capacitance with little damping. The paper describes possibilities of outsourcing DC link capacitors from devices and the resulting influences on the lifetime.}}, author = {{Puls, Simon and Koch, Jan-Niklas and Warkentin, Slavi and Borcherding, Holger}}, booktitle = {{PCIM Europe 2022 International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management Proceedings}}, location = {{Nürnberg}}, publisher = {{VDE Verlag}}, title = {{{Influence of Link Capacitor Outsourcing and Reduction of Capacitors in DC fed Drive Inverters}}}, doi = {{10.30420/565822046}}, year = {{2022}}, } @misc{8436, abstract = {{Today DC offers far-reaching advantages over AC. Therefore, many devices have been equipped with an internal DC link for years. In the field of energy supply, the use of DC technology is also growing and is state of the art e.g. in offshore, high-voltage, automotive and data center applications. The spread of industrial open DC grids is currently starting and is completely different due to the requirements: The DC grid itself and energy flows in an industrial environment are highly dynamic and bidirectional. Due to the low impedance electrical connection of the DC links of many devices, stored energies in fault cases as well as ripple currents during operation place particular requirements on the devices.}}, author = {{Puls, Simon and Koch, Jan-Niklas and Ehlich, Martin and Borcherding, Holger}}, booktitle = {{EPE Proceeding 2022}}, isbn = {{978-9-0758-1539-9}}, issn = {{2325-0313}}, keywords = {{Industries, Semiconductor device measurement, Capacitors, Europe, High-voltage techniques, Inverters, Circuit faults}}, location = {{Hannover}}, publisher = {{IEEE}}, title = {{{Particular Requirements on Drive Inverters for Safe and Robust Operation on an Open Industrial DC Grid}}}, year = {{2022}}, } @misc{8438, abstract = {{This paper investigates multi feed in operation of highly efficient SiC-based active infeed converters (AIC) for industrial DC micro grids using voltage droop control. For the demonstration of multi feed in operation two identical three-phase power factor correction (PFC) converters with different droop curve settings are utilized. The AICs are designed for a nominal power of 5 kW. A DC bus voltage range from 400 to 800 V is specified while the desired nominal DC bus voltage is 650 V. Multi feed in operation with implemented voltage droop control shows, that circulating currents between the active infeed converters occur, which cause problems due to high current peaks even on low load operation. These circulating currents are analysed.}}, author = {{Koch, Jan-Niklas and Otte, Raphael and Borcherding, Holger}}, booktitle = {{NEIS 2021; Conference on Sustainable Energy Supply and Energy Storage Systems}}, editor = {{Schulz, Detlef}}, isbn = {{978-3-8007-5651-3}}, location = {{Hamburg, Germany}}, pages = {{148--153}}, publisher = {{VDE}}, title = {{{Investigation of Multi Feed In of Active Infeed Converters for Industrial DC Micro Grids with Voltage Droop Control}}}, year = {{2022}}, } @misc{10404, abstract = {{Today DC offers far-reaching advantages over AC. Therefore, many devices have been equipped with an internal DC link for many years. In the field of energy supply, the use of DC technology is also growing and is state of the art in offshore, high-voltage, vehicle and data center applications. The spread of industrial open DC grids is currently starting and is completely different due to the requirements: The industrial DC grid is highly dynamic. This means that power varies greatly over time and therefore there is a large amount of capacitance with little damping. The paper describes possibilities of reduction and changing of DC link capacitors from devices and the resulting influences on the lifetime for both electrolytic and film capacitors.}}, author = {{Puls, Simon and Koch, Jan-Niklas and Warkentin, Slavi and Borcherding, Holger}}, booktitle = {{NEIS 2022 Conference on Sustainable Energy Supply and Energy Storage Systems}}, editor = {{Schlz, Detlef}}, location = {{Hamburg}}, pages = {{145--152}}, publisher = {{VDE Verlag}}, title = {{{Influence on Capacitor Lifetime due to Reduction of Link Capacitance for Devices operating on an Open Industrial DC grid}}}, year = {{2022}}, } @misc{8411, author = {{Borcherding, Holger and Koch, Jan-Niklas and Otte, Raphael}}, booktitle = {{NEIS 2021 - Conference on Sustainable Energy Supply and Energy Storage Systems}}, editor = {{Schulz, Detlef}}, isbn = {{978-3-8007-5651-3}}, location = {{Hamburg}}, pages = {{148--153}}, publisher = {{VDE Verlag}}, title = {{{Investigation of Multi Feed In of Active Infeed Converters for Industrial DC Micro Grids with Voltage Droop Control}}}, year = {{2021}}, } @misc{8412, abstract = {{In this paper a highly efficient 5 kW three-phase power factor correction (PFC) converter used as an active infeed converter (AIC) for an industrial DC grid is addressed. The converter operates at 100 kHz and the nominal DC bus voltage is 650 V. The DC grid the AIC is designed for is a conductor system with distributed DC link capacitors and intelligent energy storages alongside the conductor. Due to the use of intelligent energy storages, which meet the energy demand when load transients occur, it is possible to optimize the AIC for a lower power to ensure maximum system efficiency. The design of the hardware and controller is described and measurements of characteristic currents and voltages, efficiency over the whole load range and controller responses on load transients are shown.}}, author = {{Koch, Jan-Niklas and Otte, Raphael and Borcherding, Holger}}, booktitle = {{PCIM Europe digital days 2021; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}}, isbn = {{978-3-8007-5515-8}}, location = {{Online}}, publisher = {{VDE Verlag}}, title = {{{Highly Efficient SiC-based Active Infeed Converter for Industrial DC Conductor Systems}}}, year = {{2021}}, } @misc{4909, author = {{Koch, Jan-Niklas and Stuckmann, Tim and Borcherding, Holger}}, booktitle = {{PCIM Europe 2020}}, isbn = {{978-3-8007-5245-4}}, location = {{Nürnberg }}, publisher = {{VDE Verlag}}, title = {{{Cascade control of a two-stage isolated DC/DC converter with wide input voltage range for optimal efficiency}}}, year = {{2020}}, } @misc{4910, author = {{Stuckmann, Tim and Koch, Jan-Niklas and Borcherding, Holger}}, booktitle = {{PCIM Europe 2020}}, isbn = {{978-3-8007-5245-4}}, location = {{Nürnberg}}, publisher = {{VDE Verlag}}, title = {{{Design and Analysis of Highly Efficient SiC-based Phase-Shift Full-Bridge Converter for Industrial DC-Grids}}}, year = {{2020}}, } @misc{4908, author = {{Borcherding, Holger and Cepin, Simon and Koch, Jan-Niklas}}, publisher = {{TIB Hannover}}, title = {{{Abschlussbericht zum Projekt Luftstrom (Luftgekühlte Wide Band Gap-Leistungselektronik und Mechatronik) : BMBF-Verbundvorhaben im Rahmen einer Initiative der NPE - AG1 Cluster 2 : Teilprojekt Hochschule Ostwestfalen-Lippe: Untersuchung der leistungselektronischen Komponenten, von Entwärmungstechnologien und Aufbaukonzepten für Hochvolt-Bordnetzwandlern und Nebenaggregats-Wechselrichtern für Nutzfahrzeuge}}}, year = {{2018}}, } @inproceedings{4193, abstract = {{In diesem Beitrag wird eine Methode zur numerischen Berechnung von Stromoberschwingungen vorgestellt. Zunächst werden die Auswirkungen von Stromoberschwingungen und die Notwendigkeit einer solchen Berechnungsmethode erörtert. Auf der Basis von Ersatzschaltbildern werden die Betriebszustände erklärt und die notwendigen Gleichungen zur Berechnung der Zwischenkreisspannung und des Netzstroms aufgezeigt. Dann folgt eine Beschreibung des entwickelten Berechnungsalgorithmus; der es ermöglicht die Netzströme und Stromoberschwingungen zu konstruieren. Zur Validierung der Berechnungen werden Vergleichsmessungen aufgezeigt und mit den Berechnungsergebnissen verglichen.}}, author = {{Borcherding, Holger and Austermann, Johann and Koch, Jan-Niklas}}, booktitle = {{Tagungsband / AALE 2014 : das Forum für Fachleute der Automatisierungstechnik aus Hochschulen und Wirtschaft}}, isbn = {{978-3-8356-7142-3}}, location = {{Regensburg}}, pages = {{103 -- 112}}, publisher = {{Dt. Industrieverl.}}, title = {{{Numerische Berechnung von Stromoberschwingungen nichtlinearer Verbraucher}}}, year = {{2014}}, } @inproceedings{249, author = {{Austermann, Johann and Borcherding, Holger and Koch, Jan-Niklas}}, booktitle = {{Tagungsband / AALE 2014 : das Forum für Fachleute der Automatisierungstechnik aus Hochschulen und Wirtschaft ; 11. Fachkonferenz, Regensburg ; [mit interaktivem e-Book] / [OTH, Ostbayerische Technische Hochschule Regensburg ; Verein der Freunde und Förderer der Angewandten Automatisierungstechnik. Red.: Anne Purschwitz ; Aljona Hartstock}}, editor = {{Purschwitz, Anne}}, isbn = {{978-3-8356-7142-3}}, keywords = {{Automatisierungstechnik}}, location = {{Regensburg}}, pages = {{103--112}}, publisher = {{ Dt. Industrieverl. }}, title = {{{Numerische Berechnung von Stromoberschwingungen nichtlinearer Verbraucher}}}, year = {{2014}}, }