[{"type":"dissertation","status":"public","abstract":[{"lang":"eng","text":"On-bord DC-DC-Konverter sind das Bindeglied zwischen der Traktionsbatterie und der Hilfsbatterie und versorgen wichtige Komponenten des Elektrofahrzeugs. Diese Arbeit adressiert den weiten Spannungsbereich des Wandlers, der eine Folge der variierenden Spannungen der Batterien ist. Als potentielle Topologien werden der LLC Resonanzwandler, der aktiv geklemmte Flusswandler und der isolierte Vollbrücken-Konverter untersucht.Zunächst wird hierbei der LLC untersucht und verschiedene Modulationstechniken zur Abdeckung des weiten Spannungsbereichs gegenübergestellt, um zu zeigen, dass die Frequenzverdoppler-Modulation und die alternierende Phasenverschiebungsmodulation die maximale Temperatur der Halbleiter deutlich senken. Zum Wechsel zwischen Voll- und Halbbrückenmodulation wird eine Modulationstechnik vorgeschlagen, welche den transienten Magnetisierungsfluss um über 70 % respektive des konventionellen Konzept senkt. Für den aktiv geklemmten Flusswandler wird ein verbessertes Modell vorgestellt, das die Blockierspannung sehr genau modelliert. Zudem wird eine Snubber-Schaltung vorgeschlagen, welche die sekundärseitige transiente Blockierspannung deutlich reduziert. Für den isolierten Vollbrücken-Konverter werden hart- und weichschaltende Modulationstechniken analysiert und eine hartschaltende Frequenz-Verdoppler-Modulationstechnik vorgeschlagen, welche die maximale Schaltertemperatur deutlich reduziert und eine Modulationstechnik mit Beschaltung vorgestellt, um zwischen dem Voll- und Halbbrückenmodus zu wechseln. Die zuvor erarbeiteten Konverter werden unter Anwendung einer vorgestellten Designmethodik verglichen und messtechnisch evaluiert."},{"text":"On-board DC-DC converters are the connecting link between the traction battery and the auxiliary battery and supply energy to the crucial components of an electrical vehicle. This work addresses DC-DC converters of a wide conversion range necessary to cover the voltage-transfer ratio resulting from the varying state of charge of the traction and auxiliary battery and investigates three topologies for this application: the LLC resonant converter, the active-clamp forward converter and the isolated full-bridge converter. At first, the LLC resonant converter is analyzed and several operating modes are investigated and proposed to better cover the wide transfer ratio. The operating modes are benchmarked showing that the alternating-asymmetrical phase shift modulation and the frequency-doubler modulations can significantly reduce the MOSFET temperature. To switch from full-bridge mode to half-bridge mode, an improved morphing modulation is proposed that reduces the flux by about 70 % compared to the conventional concept. Finally, an integrated planar transformer is proposed to increase the power density of the LLC.The active-clamp forward converter is investigated to propose an accurate steady-state model. A snubber circuitry is presented to limit the voltage overshoot of the synchronous rectifier. The isolated full-bridge converter is investigated in its hard- and soft-switching operation. A hard-switched frequency-doubler modulation is proposed to reduce the maximum temperature significantly. Additionally, a steady-state model is derived to accurately calculate the current shape of the converter and a topology morphing concept is proposed to limit the blocking voltage of the secondary-side semiconductors during mode transition. Finally, a topology comparison and design methodology is proposed that enables a fair topology comparison. The three aforementioned topologies are experimentally evaluated.","lang":"eng"}],"department":[{"_id":"52"}],"user_id":"71353","_id":"58757","language":[{"iso":"eng"}],"citation":{"bibtex":"@book{Rehlaender_2024, title={Single-stage DC-DC converters for a wide input &#38;amp; output voltage range}, DOI={<a href=\"https://doi.org/10.17619/UNIPB/1-2148\">10.17619/UNIPB/1-2148</a>}, publisher={LibreCat University}, author={Rehlaender, Philipp}, year={2024} }","short":"P. Rehlaender, Single-Stage DC-DC Converters for a Wide Input &#38;amp; Output Voltage Range, LibreCat University, 2024.","mla":"Rehlaender, Philipp. <i>Single-Stage DC-DC Converters for a Wide Input &#38;amp; Output Voltage Range</i>. LibreCat University, 2024, doi:<a href=\"https://doi.org/10.17619/UNIPB/1-2148\">10.17619/UNIPB/1-2148</a>.","apa":"Rehlaender, P. (2024). <i>Single-stage DC-DC converters for a wide input &#38;amp; output voltage range</i>. LibreCat University. <a href=\"https://doi.org/10.17619/UNIPB/1-2148\">https://doi.org/10.17619/UNIPB/1-2148</a>","ama":"Rehlaender P. <i>Single-Stage DC-DC Converters for a Wide Input &#38;amp; Output Voltage Range</i>. LibreCat University; 2024. doi:<a href=\"https://doi.org/10.17619/UNIPB/1-2148\">10.17619/UNIPB/1-2148</a>","ieee":"P. Rehlaender, <i>Single-stage DC-DC converters for a wide input &#38;amp; output voltage range</i>. LibreCat University, 2024.","chicago":"Rehlaender, Philipp. <i>Single-Stage DC-DC Converters for a Wide Input &#38;amp; Output Voltage Range</i>. LibreCat University, 2024. <a href=\"https://doi.org/10.17619/UNIPB/1-2148\">https://doi.org/10.17619/UNIPB/1-2148</a>."},"year":"2024","date_created":"2025-02-21T11:40:18Z","author":[{"first_name":"Philipp","last_name":"Rehlaender","full_name":"Rehlaender, Philipp","id":"69469"}],"date_updated":"2025-02-21T11:40:59Z","publisher":"LibreCat University","doi":"10.17619/UNIPB/1-2148","title":"Single-stage DC-DC converters for a wide input &amp; output voltage range"},{"status":"public","type":"conference","publication":"Proc. 37th IEEE Applied Power Electronics Conference (APEC)","language":[{"iso":"eng"}],"user_id":"71291","department":[{"_id":"52"}],"_id":"30349","citation":{"apa":"Förster, N., Rehlaender, P., Wallscheid, O., Schafmeister, F., &#38; Böcker, J. (n.d.). An Open-Source Transistor Database and Toolbox as an Unified Software Engineering Tool for Managing and Evaluating Power Transistors. <i>Proc. 37th IEEE Applied Power Electronics Conference (APEC)</i>. 37th IEEE Applied Power Electronics Conference (APEC 22), Houston, TX, USA.","mla":"Förster, Nikolas, et al. “An Open-Source Transistor Database and Toolbox as an Unified Software Engineering Tool for Managing and Evaluating Power Transistors.” <i>Proc. 37th IEEE Applied Power Electronics Conference (APEC)</i>, IEEE.","short":"N. Förster, P. Rehlaender, O. Wallscheid, F. Schafmeister, J. Böcker, in: Proc. 37th IEEE Applied Power Electronics Conference (APEC), IEEE, Houston, TX, USA, n.d.","bibtex":"@inproceedings{Förster_Rehlaender_Wallscheid_Schafmeister_Böcker, place={Houston, TX, USA}, title={An Open-Source Transistor Database and Toolbox as an Unified Software Engineering Tool for Managing and Evaluating Power Transistors}, booktitle={Proc. 37th IEEE Applied Power Electronics Conference (APEC)}, publisher={IEEE}, author={Förster, Nikolas and Rehlaender, Philipp and Wallscheid, Oliver and Schafmeister, Frank and Böcker, Joachim} }","ieee":"N. Förster, P. Rehlaender, O. Wallscheid, F. Schafmeister, and J. Böcker, “An Open-Source Transistor Database and Toolbox as an Unified Software Engineering Tool for Managing and Evaluating Power Transistors,” presented at the 37th IEEE Applied Power Electronics Conference (APEC 22), Houston, TX, USA.","chicago":"Förster, Nikolas, Philipp Rehlaender, Oliver Wallscheid, Frank Schafmeister, and Joachim Böcker. “An Open-Source Transistor Database and Toolbox as an Unified Software Engineering Tool for Managing and Evaluating Power Transistors.” In <i>Proc. 37th IEEE Applied Power Electronics Conference (APEC)</i>. Houston, TX, USA: IEEE, n.d.","ama":"Förster N, Rehlaender P, Wallscheid O, Schafmeister F, Böcker J. An Open-Source Transistor Database and Toolbox as an Unified Software Engineering Tool for Managing and Evaluating Power Transistors. In: <i>Proc. 37th IEEE Applied Power Electronics Conference (APEC)</i>. IEEE."},"place":"Houston, TX, USA","year":"2022","publication_status":"inpress","conference":{"end_date":"2022-03-24","location":"Houston, TX, USA","name":"37th IEEE Applied Power Electronics Conference (APEC 22)","start_date":"2022-03-20"},"title":"An Open-Source Transistor Database and Toolbox as an Unified Software Engineering Tool for Managing and Evaluating Power Transistors","author":[{"first_name":"Nikolas","full_name":"Förster, Nikolas","last_name":"Förster"},{"first_name":"Philipp","last_name":"Rehlaender","id":"69469","full_name":"Rehlaender, Philipp"},{"orcid":"https://orcid.org/0000-0001-9362-8777","last_name":"Wallscheid","full_name":"Wallscheid, Oliver","id":"11291","first_name":"Oliver"},{"full_name":"Schafmeister, Frank","id":"71291","last_name":"Schafmeister","first_name":"Frank"},{"orcid":"0000-0002-8480-7295","last_name":"Böcker","full_name":"Böcker, Joachim","id":"66","first_name":"Joachim"}],"date_created":"2022-03-16T12:41:02Z","date_updated":"2022-03-16T13:35:07Z","publisher":"IEEE"},{"publication":"2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)","type":"conference","status":"public","_id":"35126","department":[{"_id":"52"}],"user_id":"83383","language":[{"iso":"eng"}],"year":"2022","page":"P.1-P.9","citation":{"ama":"Förster N, Hölscher J, Piepenbrock T, et al. An Open-Source FEM Magnetic Toolbox for Calculating Electric and Thermal Behavior of Power Electronic Magnetic Components. In: <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>. ; 2022:P.1-P.9.","chicago":"Förster, Nikolas, Jonas Hölscher, Till Piepenbrock, Philipp Rehlaender, Oliver Wallscheid, Frank Schafmeister, and Joachim Böcker. “An Open-Source FEM Magnetic Toolbox for Calculating Electric and Thermal Behavior of Power Electronic Magnetic Components.” In <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>, P.1-P.9, 2022.","ieee":"N. Förster <i>et al.</i>, “An Open-Source FEM Magnetic Toolbox for Calculating Electric and Thermal Behavior of Power Electronic Magnetic Components,” in <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>, 2022, p. P.1-P.9.","apa":"Förster, N., Hölscher, J., Piepenbrock, T., Rehlaender, P., Wallscheid, O., Schafmeister, F., &#38; Böcker, J. (2022). An Open-Source FEM Magnetic Toolbox for Calculating Electric and Thermal Behavior of Power Electronic Magnetic Components. <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>, P.1-P.9.","mla":"Förster, Nikolas, et al. “An Open-Source FEM Magnetic Toolbox for Calculating Electric and Thermal Behavior of Power Electronic Magnetic Components.” <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>, 2022, p. P.1-P.9.","bibtex":"@inproceedings{Förster_Hölscher_Piepenbrock_Rehlaender_Wallscheid_Schafmeister_Böcker_2022, title={An Open-Source FEM Magnetic Toolbox for Calculating Electric and Thermal Behavior of Power Electronic Magnetic Components}, booktitle={2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)}, author={Förster, Nikolas and Hölscher, Jonas and Piepenbrock, Till and Rehlaender, Philipp and Wallscheid, Oliver and Schafmeister, Frank and Böcker, Joachim}, year={2022}, pages={P.1-P.9} }","short":"N. Förster, J. Hölscher, T. Piepenbrock, P. Rehlaender, O. Wallscheid, F. Schafmeister, J. Böcker, in: 2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), 2022, p. P.1-P.9."},"date_updated":"2023-10-20T11:39:27Z","date_created":"2023-01-03T08:56:48Z","author":[{"first_name":"Nikolas","last_name":"Förster","full_name":"Förster, Nikolas","id":"83383"},{"full_name":"Hölscher, Jonas","last_name":"Hölscher","first_name":"Jonas"},{"first_name":"Till","last_name":"Piepenbrock","full_name":"Piepenbrock, Till"},{"last_name":"Rehlaender","full_name":"Rehlaender, Philipp","id":"69469","first_name":"Philipp"},{"first_name":"Oliver","orcid":"https://orcid.org/0000-0001-9362-8777","last_name":"Wallscheid","id":"11291","full_name":"Wallscheid, Oliver"},{"id":"71291","full_name":"Schafmeister, Frank","last_name":"Schafmeister","first_name":"Frank"},{"first_name":"Joachim","id":"66","full_name":"Böcker, Joachim","last_name":"Böcker","orcid":"0000-0002-8480-7295"}],"title":"An Open-Source FEM Magnetic Toolbox for Calculating Electric and Thermal Behavior of Power Electronic Magnetic Components"},{"doi":"10.1109/apec43599.2022.9773701","title":"An Open-Source Transistor Database and Toolbox as a Unified Software Engineering Tool for Managing and Evaluating Power Transistors","author":[{"last_name":"Förster","id":"83383","full_name":"Förster, Nikolas","first_name":"Nikolas"},{"first_name":"Philipp","id":"69469","full_name":"Rehlaender, Philipp","last_name":"Rehlaender"},{"orcid":"https://orcid.org/0000-0001-9362-8777","last_name":"Wallscheid","id":"11291","full_name":"Wallscheid, Oliver","first_name":"Oliver"},{"full_name":"Schafmeister, Frank","id":"71291","last_name":"Schafmeister","first_name":"Frank"},{"id":"66","full_name":"Böcker, Joachim","last_name":"Böcker","orcid":"0000-0002-8480-7295","first_name":"Joachim"}],"date_created":"2023-01-03T08:54:22Z","publisher":"IEEE","date_updated":"2023-01-23T07:28:56Z","citation":{"apa":"Förster, N., Rehlaender, P., Wallscheid, O., Schafmeister, F., &#38; Böcker, J. (2022). An Open-Source Transistor Database and Toolbox as a Unified Software Engineering Tool for Managing and Evaluating Power Transistors. <i>2022 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. <a href=\"https://doi.org/10.1109/apec43599.2022.9773701\">https://doi.org/10.1109/apec43599.2022.9773701</a>","short":"N. Förster, P. Rehlaender, O. Wallscheid, F. Schafmeister, J. Böcker, in: 2022 IEEE Applied Power Electronics Conference and Exposition (APEC), IEEE, 2022.","bibtex":"@inproceedings{Förster_Rehlaender_Wallscheid_Schafmeister_Böcker_2022, title={An Open-Source Transistor Database and Toolbox as a Unified Software Engineering Tool for Managing and Evaluating Power Transistors}, DOI={<a href=\"https://doi.org/10.1109/apec43599.2022.9773701\">10.1109/apec43599.2022.9773701</a>}, booktitle={2022 IEEE Applied Power Electronics Conference and Exposition (APEC)}, publisher={IEEE}, author={Förster, Nikolas and Rehlaender, Philipp and Wallscheid, Oliver and Schafmeister, Frank and Böcker, Joachim}, year={2022} }","mla":"Förster, Nikolas, et al. “An Open-Source Transistor Database and Toolbox as a Unified Software Engineering Tool for Managing and Evaluating Power Transistors.” <i>2022 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>, IEEE, 2022, doi:<a href=\"https://doi.org/10.1109/apec43599.2022.9773701\">10.1109/apec43599.2022.9773701</a>.","ama":"Förster N, Rehlaender P, Wallscheid O, Schafmeister F, Böcker J. An Open-Source Transistor Database and Toolbox as a Unified Software Engineering Tool for Managing and Evaluating Power Transistors. In: <i>2022 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. IEEE; 2022. doi:<a href=\"https://doi.org/10.1109/apec43599.2022.9773701\">10.1109/apec43599.2022.9773701</a>","ieee":"N. Förster, P. Rehlaender, O. Wallscheid, F. Schafmeister, and J. Böcker, “An Open-Source Transistor Database and Toolbox as a Unified Software Engineering Tool for Managing and Evaluating Power Transistors,” 2022, doi: <a href=\"https://doi.org/10.1109/apec43599.2022.9773701\">10.1109/apec43599.2022.9773701</a>.","chicago":"Förster, Nikolas, Philipp Rehlaender, Oliver Wallscheid, Frank Schafmeister, and Joachim Böcker. “An Open-Source Transistor Database and Toolbox as a Unified Software Engineering Tool for Managing and Evaluating Power Transistors.” In <i>2022 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. IEEE, 2022. <a href=\"https://doi.org/10.1109/apec43599.2022.9773701\">https://doi.org/10.1109/apec43599.2022.9773701</a>."},"year":"2022","publication_status":"published","language":[{"iso":"eng"}],"department":[{"_id":"52"}],"user_id":"83383","_id":"35125","status":"public","publication":"2022 IEEE Applied Power Electronics Conference and Exposition (APEC)","type":"conference"},{"status":"public","publication":"PCIM Europe 2022; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management","type":"conference","language":[{"iso":"eng"}],"department":[{"_id":"52"}],"user_id":"83383","_id":"35127","page":"1-10","citation":{"ama":"Förster N, Piepenbrock T, Rehlaender P, Wallscheid O, Schafmeister F, Böcker J. An Open-Source FEM Magnetics Toolbox for Power Electronic Magnetic Components. In: <i>PCIM Europe 2022; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management</i>. ; 2022:1-10. doi:<a href=\"https://doi.org/10.30420/565822103\">10.30420/565822103</a>","ieee":"N. Förster, T. Piepenbrock, P. Rehlaender, O. Wallscheid, F. Schafmeister, and J. Böcker, “An Open-Source FEM Magnetics Toolbox for Power Electronic Magnetic Components,” in <i>PCIM Europe 2022; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management</i>, 2022, pp. 1–10, doi: <a href=\"https://doi.org/10.30420/565822103\">10.30420/565822103</a>.","chicago":"Förster, Nikolas, Till Piepenbrock, Philipp Rehlaender, Oliver Wallscheid, Frank Schafmeister, and Joachim Böcker. “An Open-Source FEM Magnetics Toolbox for Power Electronic Magnetic Components.” In <i>PCIM Europe 2022; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management</i>, 1–10, 2022. <a href=\"https://doi.org/10.30420/565822103\">https://doi.org/10.30420/565822103</a>.","mla":"Förster, Nikolas, et al. “An Open-Source FEM Magnetics Toolbox for Power Electronic Magnetic Components.” <i>PCIM Europe 2022; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management</i>, 2022, pp. 1–10, doi:<a href=\"https://doi.org/10.30420/565822103\">10.30420/565822103</a>.","short":"N. Förster, T. Piepenbrock, P. Rehlaender, O. Wallscheid, F. Schafmeister, J. Böcker, in: PCIM Europe 2022; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 2022, pp. 1–10.","bibtex":"@inproceedings{Förster_Piepenbrock_Rehlaender_Wallscheid_Schafmeister_Böcker_2022, title={An Open-Source FEM Magnetics Toolbox for Power Electronic Magnetic Components}, DOI={<a href=\"https://doi.org/10.30420/565822103\">10.30420/565822103</a>}, booktitle={PCIM Europe 2022; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}, author={Förster, Nikolas and Piepenbrock, Till and Rehlaender, Philipp and Wallscheid, Oliver and Schafmeister, Frank and Böcker, Joachim}, year={2022}, pages={1–10} }","apa":"Förster, N., Piepenbrock, T., Rehlaender, P., Wallscheid, O., Schafmeister, F., &#38; Böcker, J. (2022). An Open-Source FEM Magnetics Toolbox for Power Electronic Magnetic Components. <i>PCIM Europe 2022; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management</i>, 1–10. <a href=\"https://doi.org/10.30420/565822103\">https://doi.org/10.30420/565822103</a>"},"year":"2022","doi":"10.30420/565822103","title":"An Open-Source FEM Magnetics Toolbox for Power Electronic Magnetic Components","author":[{"full_name":"Förster, Nikolas","id":"83383","last_name":"Förster","first_name":"Nikolas"},{"first_name":"Till","last_name":"Piepenbrock","full_name":"Piepenbrock, Till"},{"first_name":"Philipp","last_name":"Rehlaender","id":"69469","full_name":"Rehlaender, Philipp"},{"id":"11291","full_name":"Wallscheid, Oliver","last_name":"Wallscheid","orcid":"https://orcid.org/0000-0001-9362-8777","first_name":"Oliver"},{"id":"71291","full_name":"Schafmeister, Frank","last_name":"Schafmeister","first_name":"Frank"},{"first_name":"Joachim","id":"66","full_name":"Böcker, Joachim","orcid":"0000-0002-8480-7295","last_name":"Böcker"}],"date_created":"2023-01-03T08:58:11Z","date_updated":"2023-01-23T07:27:15Z"},{"issue":"11","publication_identifier":{"issn":["0885-8993","1941-0107"]},"publication_status":"published","intvolume":"        37","page":"13413-13427","citation":{"short":"P. Rehlaender, O. Wallscheid, F. Schafmeister, J. Böcker, IEEE Transactions on Power Electronics 37 (2022) 13413–13427.","bibtex":"@article{Rehlaender_Wallscheid_Schafmeister_Böcker_2022, title={LLC Resonant Converter Modulations for Reduced Junction Temperatures in Half-Bridge Mode and Transformer Flux in the On-the-Fly Morphing Thereto}, volume={37}, DOI={<a href=\"https://doi.org/10.1109/tpel.2022.3180758\">10.1109/tpel.2022.3180758</a>}, number={11}, journal={IEEE Transactions on Power Electronics}, publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Rehlaender, Philipp and Wallscheid, Oliver and Schafmeister, Frank and Böcker, Joachim}, year={2022}, pages={13413–13427} }","mla":"Rehlaender, Philipp, et al. “LLC Resonant Converter Modulations for Reduced Junction Temperatures in Half-Bridge Mode and Transformer Flux in the On-the-Fly Morphing Thereto.” <i>IEEE Transactions on Power Electronics</i>, vol. 37, no. 11, Institute of Electrical and Electronics Engineers (IEEE), 2022, pp. 13413–27, doi:<a href=\"https://doi.org/10.1109/tpel.2022.3180758\">10.1109/tpel.2022.3180758</a>.","apa":"Rehlaender, P., Wallscheid, O., Schafmeister, F., &#38; Böcker, J. (2022). LLC Resonant Converter Modulations for Reduced Junction Temperatures in Half-Bridge Mode and Transformer Flux in the On-the-Fly Morphing Thereto. <i>IEEE Transactions on Power Electronics</i>, <i>37</i>(11), 13413–13427. <a href=\"https://doi.org/10.1109/tpel.2022.3180758\">https://doi.org/10.1109/tpel.2022.3180758</a>","ama":"Rehlaender P, Wallscheid O, Schafmeister F, Böcker J. LLC Resonant Converter Modulations for Reduced Junction Temperatures in Half-Bridge Mode and Transformer Flux in the On-the-Fly Morphing Thereto. <i>IEEE Transactions on Power Electronics</i>. 2022;37(11):13413-13427. doi:<a href=\"https://doi.org/10.1109/tpel.2022.3180758\">10.1109/tpel.2022.3180758</a>","ieee":"P. Rehlaender, O. Wallscheid, F. Schafmeister, and J. Böcker, “LLC Resonant Converter Modulations for Reduced Junction Temperatures in Half-Bridge Mode and Transformer Flux in the On-the-Fly Morphing Thereto,” <i>IEEE Transactions on Power Electronics</i>, vol. 37, no. 11, pp. 13413–13427, 2022, doi: <a href=\"https://doi.org/10.1109/tpel.2022.3180758\">10.1109/tpel.2022.3180758</a>.","chicago":"Rehlaender, Philipp, Oliver Wallscheid, Frank Schafmeister, and Joachim Böcker. “LLC Resonant Converter Modulations for Reduced Junction Temperatures in Half-Bridge Mode and Transformer Flux in the On-the-Fly Morphing Thereto.” <i>IEEE Transactions on Power Electronics</i> 37, no. 11 (2022): 13413–27. <a href=\"https://doi.org/10.1109/tpel.2022.3180758\">https://doi.org/10.1109/tpel.2022.3180758</a>."},"year":"2022","volume":37,"author":[{"first_name":"Philipp","full_name":"Rehlaender, Philipp","id":"69469","last_name":"Rehlaender"},{"first_name":"Oliver","last_name":"Wallscheid","orcid":"https://orcid.org/0000-0001-9362-8777","full_name":"Wallscheid, Oliver","id":"11291"},{"id":"71291","full_name":"Schafmeister, Frank","last_name":"Schafmeister","first_name":"Frank"},{"first_name":"Joachim","full_name":"Böcker, Joachim","id":"66","orcid":"0000-0002-8480-7295","last_name":"Böcker"}],"date_created":"2023-04-25T08:32:29Z","publisher":"Institute of Electrical and Electronics Engineers (IEEE)","date_updated":"2023-04-25T08:41:43Z","doi":"10.1109/tpel.2022.3180758","title":"LLC Resonant Converter Modulations for Reduced Junction Temperatures in Half-Bridge Mode and Transformer Flux in the On-the-Fly Morphing Thereto","publication":"IEEE Transactions on Power Electronics","type":"journal_article","status":"public","department":[{"_id":"52"}],"user_id":"66","_id":"44163","language":[{"iso":"eng"}],"keyword":["Electrical and Electronic Engineering"]},{"language":[{"iso":"eng"}],"_id":"44164","department":[{"_id":"52"}],"user_id":"66","status":"public","publication":"2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)","type":"conference","title":"Experimental Demonstration of a 2.2kW Active-Clamp Converter for High-Current Wide-Voltage-Transfer Ratio Applications","conference":{"name":"EPE","start_date":"2022-09","location":"Hannover, Germany"},"date_updated":"2023-04-25T08:41:27Z","date_created":"2023-04-25T08:35:42Z","author":[{"id":"69469","full_name":"Rehlaender, Philipp","last_name":"Rehlaender","first_name":"Philipp"},{"last_name":"Korthauer","full_name":"Korthauer, Bastian","first_name":"Bastian"},{"last_name":"Schafmeister","full_name":"Schafmeister, Frank","id":"71291","first_name":"Frank"},{"first_name":"Joachim","orcid":"0000-0002-8480-7295","last_name":"Böcker","full_name":"Böcker, Joachim","id":"66"}],"year":"2022","page":"P.1-P.11","citation":{"ama":"Rehlaender P, Korthauer B, Schafmeister F, Böcker J. Experimental Demonstration of a 2.2kW Active-Clamp Converter for High-Current Wide-Voltage-Transfer Ratio Applications. In: <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>. ; 2022:P.1-P.11.","chicago":"Rehlaender, Philipp, Bastian Korthauer, Frank Schafmeister, and Joachim Böcker. “Experimental Demonstration of a 2.2kW Active-Clamp Converter for High-Current Wide-Voltage-Transfer Ratio Applications.” In <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>, P.1-P.11, 2022.","ieee":"P. Rehlaender, B. Korthauer, F. Schafmeister, and J. Böcker, “Experimental Demonstration of a 2.2kW Active-Clamp Converter for High-Current Wide-Voltage-Transfer Ratio Applications,” in <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>, Hannover, Germany, 2022, p. P.1-P.11.","apa":"Rehlaender, P., Korthauer, B., Schafmeister, F., &#38; Böcker, J. (2022). Experimental Demonstration of a 2.2kW Active-Clamp Converter for High-Current Wide-Voltage-Transfer Ratio Applications. <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>, P.1-P.11.","bibtex":"@inproceedings{Rehlaender_Korthauer_Schafmeister_Böcker_2022, title={Experimental Demonstration of a 2.2kW Active-Clamp Converter for High-Current Wide-Voltage-Transfer Ratio Applications}, booktitle={2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)}, author={Rehlaender, Philipp and Korthauer, Bastian and Schafmeister, Frank and Böcker, Joachim}, year={2022}, pages={P.1-P.11} }","mla":"Rehlaender, Philipp, et al. “Experimental Demonstration of a 2.2kW Active-Clamp Converter for High-Current Wide-Voltage-Transfer Ratio Applications.” <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>, 2022, p. P.1-P.11.","short":"P. Rehlaender, B. Korthauer, F. Schafmeister, J. Böcker, in: 2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), 2022, p. P.1-P.11."}},{"citation":{"apa":"Rehlaender, P., Schafmeister, F., &#38; Böcker, J. (2022). Phase-Shift Modulation for Flying-Capacitor DC-DC Converters. <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>, 1–9.","short":"P. Rehlaender, F. Schafmeister, J. Böcker, in: 2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), 2022, pp. 1–9.","mla":"Rehlaender, Philipp, et al. “Phase-Shift Modulation for Flying-Capacitor DC-DC Converters.” <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>, 2022, pp. 1–9.","bibtex":"@inproceedings{Rehlaender_Schafmeister_Böcker_2022, title={Phase-Shift Modulation for Flying-Capacitor DC-DC Converters}, booktitle={2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)}, author={Rehlaender, Philipp and Schafmeister, Frank and Böcker, Joachim}, year={2022}, pages={1–9} }","chicago":"Rehlaender, Philipp, Frank Schafmeister, and Joachim Böcker. “Phase-Shift Modulation for Flying-Capacitor DC-DC Converters.” In <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>, 1–9, 2022.","ieee":"P. Rehlaender, F. Schafmeister, and J. Böcker, “Phase-Shift Modulation for Flying-Capacitor DC-DC Converters,” in <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>, Hannover, Germany, 2022, pp. 1–9.","ama":"Rehlaender P, Schafmeister F, Böcker J. Phase-Shift Modulation for Flying-Capacitor DC-DC Converters. In: <i>2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)</i>. ; 2022:1-9."},"page":"1-9","year":"2022","date_created":"2023-04-25T08:24:57Z","author":[{"id":"69469","full_name":"Rehlaender, Philipp","last_name":"Rehlaender","first_name":"Philipp"},{"last_name":"Schafmeister","full_name":"Schafmeister, Frank","id":"71291","first_name":"Frank"},{"full_name":"Böcker, Joachim","id":"66","last_name":"Böcker","orcid":"0000-0002-8480-7295","first_name":"Joachim"}],"date_updated":"2023-04-25T08:28:00Z","conference":{"location":"Hannover, Germany","start_date":"2022-09","name":"EPE"},"title":"Phase-Shift Modulation for Flying-Capacitor DC-DC Converters","type":"conference","publication":"2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe)","status":"public","user_id":"66","department":[{"_id":"52"}],"_id":"44161","language":[{"iso":"eng"}]},{"publication_identifier":{"issn":["0885-8993","1941-0107"]},"publication_status":"published","issue":"9","year":"2021","page":"10065-10080","intvolume":"        36","citation":{"ama":"Rehlaender P, Schafmeister F, Böcker J. Interleaved Single-Stage LLC Converter Design Utilizing Half- and Full-Bridge Configurations for Wide Voltage Transfer Ratio Applications. <i>IEEE Transactions on Power Electronics</i>. 2021;36(9):10065-10080. doi:<a href=\"https://doi.org/10.1109/tpel.2021.3067843\">10.1109/tpel.2021.3067843</a>","chicago":"Rehlaender, Philipp, Frank Schafmeister, and Joachim Böcker. “Interleaved Single-Stage LLC Converter Design Utilizing Half- and Full-Bridge Configurations for Wide Voltage Transfer Ratio Applications.” <i>IEEE Transactions on Power Electronics</i> 36, no. 9 (2021): 10065–80. <a href=\"https://doi.org/10.1109/tpel.2021.3067843\">https://doi.org/10.1109/tpel.2021.3067843</a>.","ieee":"P. Rehlaender, F. Schafmeister, and J. Böcker, “Interleaved Single-Stage LLC Converter Design Utilizing Half- and Full-Bridge Configurations for Wide Voltage Transfer Ratio Applications,” <i>IEEE Transactions on Power Electronics</i>, vol. 36, no. 9, pp. 10065–10080, 2021, doi: <a href=\"https://doi.org/10.1109/tpel.2021.3067843\">10.1109/tpel.2021.3067843</a>.","apa":"Rehlaender, P., Schafmeister, F., &#38; Böcker, J. (2021). Interleaved Single-Stage LLC Converter Design Utilizing Half- and Full-Bridge Configurations for Wide Voltage Transfer Ratio Applications. <i>IEEE Transactions on Power Electronics</i>, <i>36</i>(9), 10065–10080. <a href=\"https://doi.org/10.1109/tpel.2021.3067843\">https://doi.org/10.1109/tpel.2021.3067843</a>","bibtex":"@article{Rehlaender_Schafmeister_Böcker_2021, title={Interleaved Single-Stage LLC Converter Design Utilizing Half- and Full-Bridge Configurations for Wide Voltage Transfer Ratio Applications}, volume={36}, DOI={<a href=\"https://doi.org/10.1109/tpel.2021.3067843\">10.1109/tpel.2021.3067843</a>}, number={9}, journal={IEEE Transactions on Power Electronics}, publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Rehlaender, Philipp and Schafmeister, Frank and Böcker, Joachim}, year={2021}, pages={10065–10080} }","mla":"Rehlaender, Philipp, et al. “Interleaved Single-Stage LLC Converter Design Utilizing Half- and Full-Bridge Configurations for Wide Voltage Transfer Ratio Applications.” <i>IEEE Transactions on Power Electronics</i>, vol. 36, no. 9, Institute of Electrical and Electronics Engineers (IEEE), 2021, pp. 10065–80, doi:<a href=\"https://doi.org/10.1109/tpel.2021.3067843\">10.1109/tpel.2021.3067843</a>.","short":"P. Rehlaender, F. Schafmeister, J. Böcker, IEEE Transactions on Power Electronics 36 (2021) 10065–10080."},"date_updated":"2022-02-22T08:28:30Z","publisher":"Institute of Electrical and Electronics Engineers (IEEE)","volume":36,"author":[{"id":"69469","full_name":"Rehlaender, Philipp","last_name":"Rehlaender","first_name":"Philipp"},{"last_name":"Schafmeister","id":"71291","full_name":"Schafmeister, Frank","first_name":"Frank"},{"orcid":"0000-0002-8480-7295","last_name":"Böcker","id":"66","full_name":"Böcker, Joachim","first_name":"Joachim"}],"date_created":"2022-02-20T21:18:08Z","title":"Interleaved Single-Stage LLC Converter Design Utilizing Half- and Full-Bridge Configurations for Wide Voltage Transfer Ratio Applications","doi":"10.1109/tpel.2021.3067843","publication":"IEEE Transactions on Power Electronics","type":"journal_article","status":"public","_id":"29892","department":[{"_id":"34"},{"_id":"52"}],"user_id":"66","keyword":["Electrical and Electronic Engineering"],"language":[{"iso":"eng"}]},{"publication_status":"published","citation":{"ieee":"B. Korthauer, P. Rehlaender, F. Schafmeister, and J. Böcker, “Design and Analysis of a Regenerative Snubber for a 2.2 kW Active-Clamp Forward Converter with Low-Voltage Output,” 2021, doi: <a href=\"https://doi.org/10.1109/apec42165.2021.9487130\">10.1109/apec42165.2021.9487130</a>.","chicago":"Korthauer, Bastian, Philipp Rehlaender, Frank Schafmeister, and Joachim Böcker. “Design and Analysis of a Regenerative Snubber for a 2.2 KW Active-Clamp Forward Converter with Low-Voltage Output.” In <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. IEEE, 2021. <a href=\"https://doi.org/10.1109/apec42165.2021.9487130\">https://doi.org/10.1109/apec42165.2021.9487130</a>.","ama":"Korthauer B, Rehlaender P, Schafmeister F, Böcker J. Design and Analysis of a Regenerative Snubber for a 2.2 kW Active-Clamp Forward Converter with Low-Voltage Output. In: <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. IEEE; 2021. doi:<a href=\"https://doi.org/10.1109/apec42165.2021.9487130\">10.1109/apec42165.2021.9487130</a>","short":"B. Korthauer, P. Rehlaender, F. Schafmeister, J. Böcker, in: 2021 IEEE Applied Power Electronics Conference and Exposition (APEC), IEEE, 2021.","mla":"Korthauer, Bastian, et al. “Design and Analysis of a Regenerative Snubber for a 2.2 KW Active-Clamp Forward Converter with Low-Voltage Output.” <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>, IEEE, 2021, doi:<a href=\"https://doi.org/10.1109/apec42165.2021.9487130\">10.1109/apec42165.2021.9487130</a>.","bibtex":"@inproceedings{Korthauer_Rehlaender_Schafmeister_Böcker_2021, title={Design and Analysis of a Regenerative Snubber for a 2.2 kW Active-Clamp Forward Converter with Low-Voltage Output}, DOI={<a href=\"https://doi.org/10.1109/apec42165.2021.9487130\">10.1109/apec42165.2021.9487130</a>}, booktitle={2021 IEEE Applied Power Electronics Conference and Exposition (APEC)}, publisher={IEEE}, author={Korthauer, Bastian and Rehlaender, Philipp and Schafmeister, Frank and Böcker, Joachim}, year={2021} }","apa":"Korthauer, B., Rehlaender, P., Schafmeister, F., &#38; Böcker, J. (2021). Design and Analysis of a Regenerative Snubber for a 2.2 kW Active-Clamp Forward Converter with Low-Voltage Output. <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. <a href=\"https://doi.org/10.1109/apec42165.2021.9487130\">https://doi.org/10.1109/apec42165.2021.9487130</a>"},"year":"2021","author":[{"full_name":"Korthauer, Bastian","last_name":"Korthauer","first_name":"Bastian"},{"id":"69469","full_name":"Rehlaender, Philipp","last_name":"Rehlaender","first_name":"Philipp"},{"first_name":"Frank","id":"71291","full_name":"Schafmeister, Frank","last_name":"Schafmeister"},{"full_name":"Böcker, Joachim","id":"66","orcid":"0000-0002-8480-7295","last_name":"Böcker","first_name":"Joachim"}],"date_created":"2022-02-20T21:20:14Z","date_updated":"2022-02-22T08:28:24Z","publisher":"IEEE","doi":"10.1109/apec42165.2021.9487130","title":"Design and Analysis of a Regenerative Snubber for a 2.2 kW Active-Clamp Forward Converter with Low-Voltage Output","publication":"2021 IEEE Applied Power Electronics Conference and Exposition (APEC)","type":"conference","status":"public","department":[{"_id":"34"},{"_id":"52"}],"user_id":"66","_id":"29895","language":[{"iso":"eng"}]},{"language":[{"iso":"eng"}],"ddc":["620"],"user_id":"60223","department":[{"_id":"52"}],"_id":"29871","status":"public","abstract":[{"lang":"eng","text":"LLC resonant converters typically employ power\r\nMOSFETs in their inverter stage. The generally weak reverse\r\nrecovery behaviour of the intrinsic body diodes of those\r\nMOSFETs causes significant turn-on losses when being forced\r\nto hard commutations. Continuous operation in this way will\r\nlead to self-destruction of the transistors. Consequently,\r\nzero-voltage switching (ZVS) is essential in a MOSFET-based\r\ninverter stage. To ensure ZVS, the LLC converter is operated in\r\nthe inductive region. On the contrary, IGBTs show dominant\r\nturn-off losses and are therefore conventionally not applied in\r\nLLC converters typically requiring high switching frequencies\r\nto achieve low output voltages. However, if the LLC converter\r\nis intentionally designed for capacitive operation, zero-current\r\nswitching (ZCS) is enabled and thus robust and cost-efficient\r\nIGBTs can be applied in the inverter stage. The aim of this work\r\nis to investigate the use IGBTs in the inverter of an LLC\r\nconverter. The theory behind the capacitive operated LLC is\r\nderived using a switched simulation model and compared with\r\nthe fundamental harmonic approximation (FHA). The results\r\nprove FHA to be useless for practical converter design. Instead,\r\na stress value analysis based on switched model simulations is\r\nproposed to the design a capacitive operated LLC utilizing ZCS.\r\nA 2 kW prototype for on-board EV applications was built to\r\nverify the theory and design approach. The prototype confirms\r\nthe derived theory and thus the deployment of IGBTs in the\r\ninverter stage of LLC resonant converters. Synchronous\r\nrectification turns out to require a specific control solution, but\r\nif given the resulting efficiency in the most critical operation\r\npoint exceeds the value of a MOSFET-based (inductive\r\noperated) LLC-design of an identical application. Therefore,\r\nthis concept should be further developed."}],"type":"conference","publication":"2021 IEEE Applied Power Electronics Conference and Exposition (APEC)","main_file_link":[{"url":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9487109"}],"conference":{"end_date":"2021-06-17","location":"Arizona","name":"Applied Power Electronics Conference (APEC)","start_date":"2021-06-14"},"title":"LLC Converter in Capacitive Operation Utilizing ZCS for IGBTs – Theory, Concept and Verification of a 2 kW DC-DC Converter for EVs","author":[{"first_name":"Daniel","last_name":"Urbaneck","id":"60223","full_name":"Urbaneck, Daniel"},{"id":"69469","full_name":"Rehlaender, Philipp","last_name":"Rehlaender","first_name":"Philipp"},{"orcid":"0000-0002-8480-7295","last_name":"Böcker","id":"66","full_name":"Böcker, Joachim","first_name":"Joachim"},{"id":"71291","full_name":"Schafmeister, Frank","last_name":"Schafmeister","first_name":"Frank"}],"date_created":"2022-02-18T09:36:01Z","date_updated":"2022-02-23T16:12:38Z","citation":{"ama":"Urbaneck D, Rehlaender P, Böcker J, Schafmeister F. LLC Converter in Capacitive Operation Utilizing ZCS for IGBTs – Theory, Concept and Verification of a 2 kW DC-DC Converter for EVs. In: <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. ; 2021.","chicago":"Urbaneck, Daniel, Philipp Rehlaender, Joachim Böcker, and Frank Schafmeister. “LLC Converter in Capacitive Operation Utilizing ZCS for IGBTs – Theory, Concept and Verification of a 2 KW DC-DC Converter for EVs.” In <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>, 2021.","ieee":"D. Urbaneck, P. Rehlaender, J. Böcker, and F. Schafmeister, “LLC Converter in Capacitive Operation Utilizing ZCS for IGBTs – Theory, Concept and Verification of a 2 kW DC-DC Converter for EVs,” presented at the Applied Power Electronics Conference (APEC), Arizona, 2021.","apa":"Urbaneck, D., Rehlaender, P., Böcker, J., &#38; Schafmeister, F. (2021). LLC Converter in Capacitive Operation Utilizing ZCS for IGBTs – Theory, Concept and Verification of a 2 kW DC-DC Converter for EVs. <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. Applied Power Electronics Conference (APEC), Arizona.","mla":"Urbaneck, Daniel, et al. “LLC Converter in Capacitive Operation Utilizing ZCS for IGBTs – Theory, Concept and Verification of a 2 KW DC-DC Converter for EVs.” <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>, 2021.","short":"D. Urbaneck, P. Rehlaender, J. Böcker, F. Schafmeister, in: 2021 IEEE Applied Power Electronics Conference and Exposition (APEC), 2021.","bibtex":"@inproceedings{Urbaneck_Rehlaender_Böcker_Schafmeister_2021, title={LLC Converter in Capacitive Operation Utilizing ZCS for IGBTs – Theory, Concept and Verification of a 2 kW DC-DC Converter for EVs}, booktitle={2021 IEEE Applied Power Electronics Conference and Exposition (APEC)}, author={Urbaneck, Daniel and Rehlaender, Philipp and Böcker, Joachim and Schafmeister, Frank}, year={2021} }"},"year":"2021","publication_status":"published","has_accepted_license":"1"},{"publication_status":"published","publication_identifier":{"isbn":["978-1-7281-8950-5"]},"year":"2021","citation":{"mla":"Rehlaender, Philipp, et al. “Alternating Asymmetrical Phase-Shift Modulation for Full-Bridge Converters with Balanced Switching Losses to Reduce Thermal Imbalances.” <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>, IEEE, 2021, doi:<a href=\"https://doi.org/10.1109/apec42165.2021.9487104\">10.1109/apec42165.2021.9487104</a>.","bibtex":"@inproceedings{Rehlaender_Unruh_Schafmeister_Böcker_2021, title={Alternating Asymmetrical Phase-Shift Modulation for Full-Bridge Converters with Balanced Switching Losses to Reduce Thermal Imbalances}, DOI={<a href=\"https://doi.org/10.1109/apec42165.2021.9487104\">10.1109/apec42165.2021.9487104</a>}, booktitle={2021 IEEE Applied Power Electronics Conference and Exposition (APEC)}, publisher={IEEE}, author={Rehlaender, Philipp and Unruh, Roland and Schafmeister, Frank and Böcker, Joachim}, year={2021} }","short":"P. Rehlaender, R. Unruh, F. Schafmeister, J. Böcker, in: 2021 IEEE Applied Power Electronics Conference and Exposition (APEC), IEEE, 2021.","apa":"Rehlaender, P., Unruh, R., Schafmeister, F., &#38; Böcker, J. (2021). Alternating Asymmetrical Phase-Shift Modulation for Full-Bridge Converters with Balanced Switching Losses to Reduce Thermal Imbalances. <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. 2021 IEEE Applied Power Electronics Conference and Exposition (APEC), Phoenix, AZ, USA. <a href=\"https://doi.org/10.1109/apec42165.2021.9487104\">https://doi.org/10.1109/apec42165.2021.9487104</a>","ieee":"P. Rehlaender, R. Unruh, F. Schafmeister, and J. Böcker, “Alternating Asymmetrical Phase-Shift Modulation for Full-Bridge Converters with Balanced Switching Losses to Reduce Thermal Imbalances,” presented at the 2021 IEEE Applied Power Electronics Conference and Exposition (APEC), Phoenix, AZ, USA, 2021, doi: <a href=\"https://doi.org/10.1109/apec42165.2021.9487104\">10.1109/apec42165.2021.9487104</a>.","chicago":"Rehlaender, Philipp, Roland Unruh, Frank Schafmeister, and Joachim Böcker. “Alternating Asymmetrical Phase-Shift Modulation for Full-Bridge Converters with Balanced Switching Losses to Reduce Thermal Imbalances.” In <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. IEEE, 2021. <a href=\"https://doi.org/10.1109/apec42165.2021.9487104\">https://doi.org/10.1109/apec42165.2021.9487104</a>.","ama":"Rehlaender P, Unruh R, Schafmeister F, Böcker J. Alternating Asymmetrical Phase-Shift Modulation for Full-Bridge Converters with Balanced Switching Losses to Reduce Thermal Imbalances. In: <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. IEEE; 2021. doi:<a href=\"https://doi.org/10.1109/apec42165.2021.9487104\">10.1109/apec42165.2021.9487104</a>"},"publisher":"IEEE","date_updated":"2023-10-20T11:50:25Z","date_created":"2022-02-20T21:19:46Z","author":[{"last_name":"Rehlaender","id":"69469","full_name":"Rehlaender, Philipp","first_name":"Philipp"},{"first_name":"Roland","full_name":"Unruh, Roland","id":"34289","last_name":"Unruh"},{"first_name":"Frank","full_name":"Schafmeister, Frank","id":"71291","last_name":"Schafmeister"},{"id":"66","full_name":"Böcker, Joachim","orcid":"0000-0002-8480-7295","last_name":"Böcker","first_name":"Joachim"}],"title":"Alternating Asymmetrical Phase-Shift Modulation for Full-Bridge Converters with Balanced Switching Losses to Reduce Thermal Imbalances","main_file_link":[{"url":"https://ieeexplore.ieee.org/abstract/document/9487104"}],"doi":"10.1109/apec42165.2021.9487104","conference":{"name":"2021 IEEE Applied Power Electronics Conference and Exposition (APEC)","start_date":"2021-06-14","end_date":"2021-06-17","location":"Phoenix, AZ, USA"},"type":"conference","publication":"2021 IEEE Applied Power Electronics Conference and Exposition (APEC)","abstract":[{"lang":"eng","text":"Phase-shift modulated full bridge converters suffer from thermal imbalances of the inverter switches. The lagging leg switches are subject to larger commutation currents compared to those of the leading leg as the transformer current reduces in the freewheeling interval. Furthermore, after this interval, the energy in the series inductance may not be large enough to achieve zero-voltage switching (ZVS) for the leading leg. Both effects result in thermal imbalances. This paper analyzes the alternating-asymmetrical phase-shift modulation to achieve balanced conduction and switching losses for all four switches while showing that this modulation is easily implemented on standard DSPs. The modulation has been implemented to LLC converters where experimental measurement results proved its effectiveness for LLC converters by reducing the temperature deviation from 6.3 K to only 0.2 K such that the peak temperature is reduced from 95 °C to 92 °C. The paper also proves that the modulation can be utilized to improve the efficiency of LLC converters operated at very low gains while simultaneously reducing the junction temperature of all four switches compared to the conventional complementary modulation. Finally, EMI implications are analyzed, which show that the modulation may be beneficial for reducing the common-mode emissions around the operating frequency."}],"status":"public","_id":"29893","user_id":"34289","department":[{"_id":"34"},{"_id":"52"}],"keyword":["Phase-Shifted Full Bridge","Full-Bridge Converter","Phase-Shift Control","Phase-Shift Modulation","LLC Converter","Thermal Balancing"],"language":[{"iso":"eng"}]},{"keyword":["Resonant converter","High frequency power converter","Switched-mode power supply","Converter control","Control methods for electrical systems"],"language":[{"iso":"eng"}],"_id":"29899","department":[{"_id":"34"},{"_id":"52"}],"user_id":"34289","abstract":[{"lang":"eng","text":"LLC resonant converters are typically unsuitable to be applied for wide voltage-transfer ratio applications. With a full-bridge inverter, however, they can be operated in a variety of different modulations. Most notably, by permanently turning on one MOSFET and turning off the other MOSFET of the same bridge leg, the LLC can be operated in half-bridge configuration reducing the gain by a factor of two. The resonant capacitor is hereby charged to an average voltage of half the input voltage. In this modulation, however, the switch that is permanently turned on is stressed by the complete resonant current while exhibiting no switching losses. This paper proves that the frequency-doubler modulation can better balance the losses among all MOSFETs and should be the preferred mode of operation favored over the conventional half-bridge modulation. This paper analyzes the beneficial loss distribution, proposes an on-the-fly morphing modulation and discusses potential operating strategies to further reduce the junction temperature. Furthermore, it is shown that this modulation can also be altered to achieve the asymmetrical LLC operation. Experimental measurement results show that the modulation results in a substantial decrease of the maximum MOSFET temperature and shows that the converter can be smoothly transitioned during operation from full-bridge modulation to the frequency-doubler half-bridge operation and back."}],"status":"public","publication":"23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)","type":"conference","title":"Frequency-Doubler Modulation for Reduced Junction Temperatures for LLC Resonant Converters Operated in Half-Bridge Configuration","conference":{"name":"23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)","start_date":"2021-09-06","end_date":"2021-09-10","location":"Ghent, Belgium"},"doi":"10.23919/EPE21ECCEEurope50061.2021.9570674","main_file_link":[{"url":"https://ieeexplore.ieee.org/abstract/document/9570674"}],"date_updated":"2023-02-09T11:01:11Z","publisher":"IEEE","date_created":"2022-02-20T21:29:48Z","author":[{"last_name":"Rehlaender","id":"69469","full_name":"Rehlaender, Philipp","first_name":"Philipp"},{"last_name":"Unruh","id":"34289","full_name":"Unruh, Roland","first_name":"Roland"},{"full_name":"Hankeln, Lars","last_name":"Hankeln","first_name":"Lars"},{"first_name":"Frank","full_name":"Schafmeister, Frank","id":"71291","last_name":"Schafmeister"},{"id":"66","full_name":"Böcker, Joachim","orcid":"0000-0002-8480-7295","last_name":"Böcker","first_name":"Joachim"}],"year":"2021","citation":{"chicago":"Rehlaender, Philipp, Roland Unruh, Lars Hankeln, Frank Schafmeister, and Joachim Böcker. “Frequency-Doubler Modulation for Reduced Junction Temperatures for LLC Resonant Converters Operated in Half-Bridge Configuration.” In <i>23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe)</i>. IEEE, 2021. <a href=\"https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570674\">https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570674</a>.","ieee":"P. Rehlaender, R. Unruh, L. Hankeln, F. Schafmeister, and J. Böcker, “Frequency-Doubler Modulation for Reduced Junction Temperatures for LLC Resonant Converters Operated in Half-Bridge Configuration,” presented at the 23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe), Ghent, Belgium, 2021, doi: <a href=\"https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570674\">10.23919/EPE21ECCEEurope50061.2021.9570674</a>.","ama":"Rehlaender P, Unruh R, Hankeln L, Schafmeister F, Böcker J. Frequency-Doubler Modulation for Reduced Junction Temperatures for LLC Resonant Converters Operated in Half-Bridge Configuration. In: <i>23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe)</i>. IEEE; 2021. doi:<a href=\"https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570674\">10.23919/EPE21ECCEEurope50061.2021.9570674</a>","apa":"Rehlaender, P., Unruh, R., Hankeln, L., Schafmeister, F., &#38; Böcker, J. (2021). Frequency-Doubler Modulation for Reduced Junction Temperatures for LLC Resonant Converters Operated in Half-Bridge Configuration. <i>23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe)</i>. 23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe), Ghent, Belgium. <a href=\"https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570674\">https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570674</a>","short":"P. Rehlaender, R. Unruh, L. Hankeln, F. Schafmeister, J. Böcker, in: 23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe), IEEE, 2021.","mla":"Rehlaender, Philipp, et al. “Frequency-Doubler Modulation for Reduced Junction Temperatures for LLC Resonant Converters Operated in Half-Bridge Configuration.” <i>23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe)</i>, IEEE, 2021, doi:<a href=\"https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570674\">10.23919/EPE21ECCEEurope50061.2021.9570674</a>.","bibtex":"@inproceedings{Rehlaender_Unruh_Hankeln_Schafmeister_Böcker_2021, title={Frequency-Doubler Modulation for Reduced Junction Temperatures for LLC Resonant Converters Operated in Half-Bridge Configuration}, DOI={<a href=\"https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570674\">10.23919/EPE21ECCEEurope50061.2021.9570674</a>}, booktitle={23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe)}, publisher={IEEE}, author={Rehlaender, Philipp and Unruh, Roland and Hankeln, Lars and Schafmeister, Frank and Böcker, Joachim}, year={2021} }"},"publication_identifier":{"isbn":["978-9-0758-1537-5"]},"publication_status":"published"},{"language":[{"iso":"eng"}],"department":[{"_id":"34"},{"_id":"52"}],"user_id":"66","_id":"29894","status":"public","publication":"2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)","type":"conference","doi":"10.23919/epe20ecceeurope43536.2020.9215736","title":"Dual Interleaved 3.6 kW LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode as a Single-Stage Architecture of an Automotive On-Board DC-DC Converter","date_created":"2022-02-20T21:20:00Z","author":[{"last_name":"Rehlaender","id":"69469","full_name":"Rehlaender, Philipp","first_name":"Philipp"},{"full_name":"Tikhonov, Sergey","last_name":"Tikhonov","first_name":"Sergey"},{"first_name":"Frank","id":"71291","full_name":"Schafmeister, Frank","last_name":"Schafmeister"},{"last_name":"Böcker","orcid":"0000-0002-8480-7295","id":"66","full_name":"Böcker, Joachim","first_name":"Joachim"}],"date_updated":"2022-02-22T08:28:40Z","publisher":"IEEE","citation":{"ama":"Rehlaender P, Tikhonov S, Schafmeister F, Böcker J. Dual Interleaved 3.6 kW LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode as a Single-Stage Architecture of an Automotive On-Board DC-DC Converter. In: <i>2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe)</i>. IEEE; 2020. doi:<a href=\"https://doi.org/10.23919/epe20ecceeurope43536.2020.9215736\">10.23919/epe20ecceeurope43536.2020.9215736</a>","ieee":"P. Rehlaender, S. Tikhonov, F. Schafmeister, and J. Böcker, “Dual Interleaved 3.6 kW LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode as a Single-Stage Architecture of an Automotive On-Board DC-DC Converter,” 2020, doi: <a href=\"https://doi.org/10.23919/epe20ecceeurope43536.2020.9215736\">10.23919/epe20ecceeurope43536.2020.9215736</a>.","chicago":"Rehlaender, Philipp, Sergey Tikhonov, Frank Schafmeister, and Joachim Böcker. “Dual Interleaved 3.6 KW LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode as a Single-Stage Architecture of an Automotive On-Board DC-DC Converter.” In <i>2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe)</i>. IEEE, 2020. <a href=\"https://doi.org/10.23919/epe20ecceeurope43536.2020.9215736\">https://doi.org/10.23919/epe20ecceeurope43536.2020.9215736</a>.","apa":"Rehlaender, P., Tikhonov, S., Schafmeister, F., &#38; Böcker, J. (2020). Dual Interleaved 3.6 kW LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode as a Single-Stage Architecture of an Automotive On-Board DC-DC Converter. <i>2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe)</i>. <a href=\"https://doi.org/10.23919/epe20ecceeurope43536.2020.9215736\">https://doi.org/10.23919/epe20ecceeurope43536.2020.9215736</a>","bibtex":"@inproceedings{Rehlaender_Tikhonov_Schafmeister_Böcker_2020, title={Dual Interleaved 3.6 kW LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode as a Single-Stage Architecture of an Automotive On-Board DC-DC Converter}, DOI={<a href=\"https://doi.org/10.23919/epe20ecceeurope43536.2020.9215736\">10.23919/epe20ecceeurope43536.2020.9215736</a>}, booktitle={2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe)}, publisher={IEEE}, author={Rehlaender, Philipp and Tikhonov, Sergey and Schafmeister, Frank and Böcker, Joachim}, year={2020} }","mla":"Rehlaender, Philipp, et al. “Dual Interleaved 3.6 KW LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode as a Single-Stage Architecture of an Automotive On-Board DC-DC Converter.” <i>2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe)</i>, IEEE, 2020, doi:<a href=\"https://doi.org/10.23919/epe20ecceeurope43536.2020.9215736\">10.23919/epe20ecceeurope43536.2020.9215736</a>.","short":"P. Rehlaender, S. Tikhonov, F. Schafmeister, J. Böcker, in: 2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe), IEEE, 2020."},"year":"2020","publication_status":"published"},{"language":[{"iso":"eng"}],"department":[{"_id":"34"},{"_id":"52"}],"user_id":"66","_id":"29896","status":"public","abstract":[{"lang":"eng","text":"Automotive DC-DC converters linking the traction battery to the auxiliary battery are characterized by the wide input and output voltage ranges resulting from the varying state-of-charge of the traction and auxiliary battery. The wide voltage transfer ratio needs to be covered for the entire load range conventionally requiring two-stage converter architectures. Considering a less complex single-stage solution potentially enabling cost and weight advantages, traditional LLC converters are unsuitable topologies since it results in a too wide operating frequency range. Most alternative topology candidates show comparable difficulties. To overcome this issue, the gain range of the LLC with full-bridge inverter can be extended by operation in half-bridge mode for low voltage transfer ratios. Phase-shift operation is utilized for intermediate gains and low loads. This paper describes a detailed design methodology for the resonant tank. The experimental results with a peak efficiency of 96.5 % and a power density of 2.1 kW/l prove the proposed concept."}],"publication":"PCIM Europe digital days 2020","type":"conference","conference":{"start_date":"2020-07-07","name":"Power Conversion and Intelligent Motion (PCIM)","location":"Nürnberg","end_date":"2020-07-08"},"main_file_link":[{"url":"https://ieeexplore.ieee.org/document/9177997"}],"title":"A 3,6 kW Single-Stage LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode for Automotive Onboard DC-DC Conversion","date_created":"2022-02-20T21:23:34Z","author":[{"full_name":"Rehlaender, Philipp","id":"69469","last_name":"Rehlaender","first_name":"Philipp"},{"first_name":"Tobias","last_name":"Grote","full_name":"Grote, Tobias"},{"first_name":"Sergey","last_name":"Tikhonov","full_name":"Tikhonov, Sergey"},{"first_name":"Schröder","last_name":"Mario","full_name":"Mario, Schröder"},{"first_name":"Frank","full_name":"Schafmeister, Frank","id":"71291","last_name":"Schafmeister"},{"orcid":"0000-0002-8480-7295","last_name":"Böcker","full_name":"Böcker, Joachim","id":"66","first_name":"Joachim"}],"date_updated":"2022-02-23T14:52:41Z","citation":{"ama":"Rehlaender P, Grote T, Tikhonov S, Mario S, Schafmeister F, Böcker J. A 3,6 kW Single-Stage LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode for Automotive Onboard DC-DC Conversion. In: <i>PCIM Europe Digital Days 2020</i>. ; 2020.","chicago":"Rehlaender, Philipp, Tobias Grote, Sergey Tikhonov, Schröder Mario, Frank Schafmeister, and Joachim Böcker. “A 3,6 KW Single-Stage LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode for Automotive Onboard DC-DC Conversion.” In <i>PCIM Europe Digital Days 2020</i>, 2020.","ieee":"P. Rehlaender, T. Grote, S. Tikhonov, S. Mario, F. Schafmeister, and J. Böcker, “A 3,6 kW Single-Stage LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode for Automotive Onboard DC-DC Conversion,” presented at the Power Conversion and Intelligent Motion (PCIM), Nürnberg, 2020.","mla":"Rehlaender, Philipp, et al. “A 3,6 KW Single-Stage LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode for Automotive Onboard DC-DC Conversion.” <i>PCIM Europe Digital Days 2020</i>, 2020.","short":"P. Rehlaender, T. Grote, S. Tikhonov, S. Mario, F. Schafmeister, J. Böcker, in: PCIM Europe Digital Days 2020, 2020.","bibtex":"@inproceedings{Rehlaender_Grote_Tikhonov_Mario_Schafmeister_Böcker_2020, title={A 3,6 kW Single-Stage LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode for Automotive Onboard DC-DC Conversion}, booktitle={PCIM Europe digital days 2020}, author={Rehlaender, Philipp and Grote, Tobias and Tikhonov, Sergey and Mario, Schröder and Schafmeister, Frank and Böcker, Joachim}, year={2020} }","apa":"Rehlaender, P., Grote, T., Tikhonov, S., Mario, S., Schafmeister, F., &#38; Böcker, J. (2020). A 3,6 kW Single-Stage LLC Converter Operating in Half-Bridge, Full-Bridge and Phase-Shift Mode for Automotive Onboard DC-DC Conversion. <i>PCIM Europe Digital Days 2020</i>. Power Conversion and Intelligent Motion (PCIM), Nürnberg."},"year":"2020"},{"title":"Two-Stage Automotive DC-DC Converter Design with Wide Voltage-Transfer Range Utilizing Asymmetric LLC Operation","main_file_link":[{"url":"https://ieeexplore.ieee.org/document/9177998"}],"conference":{"end_date":"2020-07-08","start_date":"2020-07-07","name":"PCIM Europe digital days 2020"},"date_updated":"2022-02-23T14:51:13Z","author":[{"first_name":"Tobias","last_name":"Rüschenbaum","full_name":"Rüschenbaum, Tobias"},{"first_name":"Philipp","last_name":"Rehlaender","full_name":"Rehlaender, Philipp","id":"69469"},{"last_name":"Ha","full_name":"Ha, Phuong","first_name":"Phuong"},{"full_name":"Grote, Tobias","last_name":"Grote","first_name":"Tobias"},{"first_name":"Frank","id":"71291","full_name":"Schafmeister, Frank","last_name":"Schafmeister"},{"orcid":"0000-0002-8480-7295","last_name":"Böcker","id":"66","full_name":"Böcker, Joachim","first_name":"Joachim"}],"date_created":"2022-02-20T21:28:08Z","year":"2020","citation":{"ama":"Rüschenbaum T, Rehlaender P, Ha P, Grote T, Schafmeister F, Böcker J. Two-Stage Automotive DC-DC Converter Design with Wide Voltage-Transfer Range Utilizing Asymmetric LLC Operation. In: <i>PCIM Europe Digital Days 2020</i>. ; 2020.","chicago":"Rüschenbaum, Tobias, Philipp Rehlaender, Phuong Ha, Tobias Grote, Frank Schafmeister, and Joachim Böcker. “Two-Stage Automotive DC-DC Converter Design with Wide Voltage-Transfer Range Utilizing Asymmetric LLC Operation.” In <i>PCIM Europe Digital Days 2020</i>, 2020.","ieee":"T. Rüschenbaum, P. Rehlaender, P. Ha, T. Grote, F. Schafmeister, and J. Böcker, “Two-Stage Automotive DC-DC Converter Design with Wide Voltage-Transfer Range Utilizing Asymmetric LLC Operation,” presented at the PCIM Europe digital days 2020, 2020.","mla":"Rüschenbaum, Tobias, et al. “Two-Stage Automotive DC-DC Converter Design with Wide Voltage-Transfer Range Utilizing Asymmetric LLC Operation.” <i>PCIM Europe Digital Days 2020</i>, 2020.","short":"T. Rüschenbaum, P. Rehlaender, P. Ha, T. Grote, F. Schafmeister, J. Böcker, in: PCIM Europe Digital Days 2020, 2020.","bibtex":"@inproceedings{Rüschenbaum_Rehlaender_Ha_Grote_Schafmeister_Böcker_2020, title={Two-Stage Automotive DC-DC Converter Design with Wide Voltage-Transfer Range Utilizing Asymmetric LLC Operation}, booktitle={PCIM Europe digital days 2020}, author={Rüschenbaum, Tobias and Rehlaender, Philipp and Ha, Phuong and Grote, Tobias and Schafmeister, Frank and Böcker, Joachim}, year={2020} }","apa":"Rüschenbaum, T., Rehlaender, P., Ha, P., Grote, T., Schafmeister, F., &#38; Böcker, J. (2020). Two-Stage Automotive DC-DC Converter Design with Wide Voltage-Transfer Range Utilizing Asymmetric LLC Operation. <i>PCIM Europe Digital Days 2020</i>. PCIM Europe digital days 2020."},"language":[{"iso":"eng"}],"_id":"29898","user_id":"66","department":[{"_id":"34"},{"_id":"52"}],"abstract":[{"text":"An onboard DC-DC converter connects the high voltage traction battery to the low voltage auxiliary battery of an EV. It has to provide power across a wide range of input and output voltages. This paper presents the design and evaluation of an economical two-stage converter concept consisting of a first-stage boost converter and a second-stage LLC converter. While for low input voltages, the boost converter can supply the second-stage LLC with the optimum bulk voltage, for high input voltages, the boost converter is turned off and the LLC regulates the output voltage on its own. Whereas this is unproblematic for high output currents, for low loads high switching frequencies become necessary. For this purpose, the LLC needs to be designed for a wide gain range. Traditionally, this is achieved through a small magnetizing inductance resulting in increased conduction losses. If an asymmetric duty cycle operation is used to cover the low gains at low output current, the LLC can be optimized for a better efficiency. A prototype design proves that the asymmetric duty cycle operation is feasible to achieve a wide gain range at a high efficiency whereas the conventional design achieves very poor efficiencies.","lang":"eng"}],"status":"public","type":"conference","publication":"PCIM Europe digital days 2020"},{"language":[{"iso":"eng"}],"ddc":["620"],"user_id":"60223","department":[{"_id":"52"}],"_id":"29874","status":"public","abstract":[{"text":"LLC resonant converters generally employ MOSFETs in the inverter stage, which can be of half-bridge\r\n(HB) or full-bridge (FB) type. The generally weak intrinsic (body) diodes of the MOSFETs cause turn-on\r\nlosses when being forced to hard current commutations finally leading to the components self-destruction when operated constantly in this way. Consequently, zero-voltage switching (ZVS) operation is more or less essential in a silicon (Si) MOSFET-based HB or FB. To ensure ZVS, the LLC is operated in the inductive region, i.e. with lagging resonant current. On the contrary, IGBTs show dominant turn-off losses\r\nand therefore are conventionally not applied in LLCs typically requiring high switching frequencies to achieve low output voltages. Yet, if the LLC is intentionally designed for the capacitive region, i. e.\r\noperation with leading current, zero-current switching (ZCS) enabling IGBTs in the inverter stage can be ensured. This paper explores in detail the LLC in the capacitive operating region and gives design considerations for a capacitive LLC utilizing both robust and cost-efficient IGBTs for an exemplary 2.2 kW\r\nautomotive on-board DC-DC converter application. The results of a loss analysis show that the LLC resonant converter can be operated well in the capacitive region. In the given case, significantly lower\r\noverall and 30 % lower inverter stage losses are achieved in the thermally relevant worst-case comparison with an inductive LLC based on Si MOSFETs.","lang":"eng"}],"type":"conference","publication":"PCIM Europe digital days 2020","main_file_link":[{"url":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9178220"}],"conference":{"end_date":"2020-07-08","location":"Nürnberg","name":"Power Conversion and Intelligent Motion (PCIM)","start_date":"2020-07-07"},"title":"LLC Converter Design in Capacitive Operation utilizes ZCS for IGBTs – a Concept Study for a 2.2 kW Automotive DC-DC Stage","author":[{"last_name":"Urbaneck","id":"60223","full_name":"Urbaneck, Daniel","first_name":"Daniel"},{"first_name":"Philipp","last_name":"Rehlaender","id":"69469","full_name":"Rehlaender, Philipp"},{"last_name":"Schafmeister","id":"71291","full_name":"Schafmeister, Frank","first_name":"Frank"},{"last_name":"Böcker","orcid":" https://orcid.org/0000-0002-8480-7295","full_name":"Böcker, Joachim","id":"66","first_name":"Joachim"}],"date_created":"2022-02-18T09:42:28Z","date_updated":"2022-02-23T16:12:56Z","citation":{"ama":"Urbaneck D, Rehlaender P, Schafmeister F, Böcker J. LLC Converter Design in Capacitive Operation utilizes ZCS for IGBTs – a Concept Study for a 2.2 kW Automotive DC-DC Stage. In: <i>PCIM Europe Digital Days 2020</i>. ; 2020.","ieee":"D. Urbaneck, P. Rehlaender, F. Schafmeister, and J. Böcker, “LLC Converter Design in Capacitive Operation utilizes ZCS for IGBTs – a Concept Study for a 2.2 kW Automotive DC-DC Stage,” presented at the Power Conversion and Intelligent Motion (PCIM), Nürnberg, 2020.","chicago":"Urbaneck, Daniel, Philipp Rehlaender, Frank Schafmeister, and Joachim Böcker. “LLC Converter Design in Capacitive Operation Utilizes ZCS for IGBTs – a Concept Study for a 2.2 KW Automotive DC-DC Stage.” In <i>PCIM Europe Digital Days 2020</i>, 2020.","bibtex":"@inproceedings{Urbaneck_Rehlaender_Schafmeister_Böcker_2020, title={LLC Converter Design in Capacitive Operation utilizes ZCS for IGBTs – a Concept Study for a 2.2 kW Automotive DC-DC Stage}, booktitle={PCIM Europe digital days 2020}, author={Urbaneck, Daniel and Rehlaender, Philipp and Schafmeister, Frank and Böcker, Joachim}, year={2020} }","mla":"Urbaneck, Daniel, et al. “LLC Converter Design in Capacitive Operation Utilizes ZCS for IGBTs – a Concept Study for a 2.2 KW Automotive DC-DC Stage.” <i>PCIM Europe Digital Days 2020</i>, 2020.","short":"D. Urbaneck, P. Rehlaender, F. Schafmeister, J. Böcker, in: PCIM Europe Digital Days 2020, 2020.","apa":"Urbaneck, D., Rehlaender, P., Schafmeister, F., &#38; Böcker, J. (2020). LLC Converter Design in Capacitive Operation utilizes ZCS for IGBTs – a Concept Study for a 2.2 kW Automotive DC-DC Stage. <i>PCIM Europe Digital Days 2020</i>. Power Conversion and Intelligent Motion (PCIM), Nürnberg."},"year":"2020","has_accepted_license":"1"},{"citation":{"mla":"Rehlaender, Philipp, et al. “A PCB Integrated Winding Using a Litz Structure for a Wireless Charging Coil.” <i>2019 21st European Conference on Power Electronics and Applications (EPE ’19 ECCE Europe)</i>, 2019, doi:<a href=\"https://doi.org/10.23919/epe.2019.8914900\">10.23919/epe.2019.8914900</a>.","bibtex":"@inproceedings{Rehlaender_Grote_Tikhonov_Niejende_Schafmeister_Bocker_Thiemann_2019, title={A PCB Integrated Winding Using a Litz Structure for a Wireless Charging Coil}, DOI={<a href=\"https://doi.org/10.23919/epe.2019.8914900\">10.23919/epe.2019.8914900</a>}, booktitle={2019 21st European Conference on Power Electronics and Applications (EPE ’19 ECCE Europe)}, author={Rehlaender, Philipp and Grote, Tobias and Tikhonov, Sergey and Niejende, Hugues and Schafmeister, Frank and Bocker, Joachim and Thiemann, Peter}, year={2019} }","short":"P. Rehlaender, T. Grote, S. Tikhonov, H. Niejende, F. Schafmeister, J. Bocker, P. Thiemann, in: 2019 21st European Conference on Power Electronics and Applications (EPE ’19 ECCE Europe), 2019.","apa":"Rehlaender, P., Grote, T., Tikhonov, S., Niejende, H., Schafmeister, F., Bocker, J., &#38; Thiemann, P. (2019). A PCB Integrated Winding Using a Litz Structure for a Wireless Charging Coil. In <i>2019 21st European Conference on Power Electronics and Applications (EPE ’19 ECCE Europe)</i>. <a href=\"https://doi.org/10.23919/epe.2019.8914900\">https://doi.org/10.23919/epe.2019.8914900</a>","chicago":"Rehlaender, Philipp, Tobias Grote, Sergey Tikhonov, Hugues Niejende, Frank Schafmeister, Joachim Bocker, and Peter Thiemann. “A PCB Integrated Winding Using a Litz Structure for a Wireless Charging Coil.” In <i>2019 21st European Conference on Power Electronics and Applications (EPE ’19 ECCE Europe)</i>, 2019. <a href=\"https://doi.org/10.23919/epe.2019.8914900\">https://doi.org/10.23919/epe.2019.8914900</a>.","ieee":"P. Rehlaender <i>et al.</i>, “A PCB Integrated Winding Using a Litz Structure for a Wireless Charging Coil,” in <i>2019 21st European Conference on Power Electronics and Applications (EPE ’19 ECCE Europe)</i>, 2019.","ama":"Rehlaender P, Grote T, Tikhonov S, et al. A PCB Integrated Winding Using a Litz Structure for a Wireless Charging Coil. 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