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98 Publications
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2021 | Conference Paper | LibreCat-ID: 29895
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: 10.1109/apec42165.2021.9487130.
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2021 | Conference Paper | LibreCat-ID: 29850
B. Strothmann, G. Book, F. Schafmeister, and J. Böcker, “Single-Phase Operation of Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger with Minimized DC-Link,” in PCIM Europe digital days 2021; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 2021, pp. 1–8.
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2021 | Conference Paper | LibreCat-ID: 29871
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.
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2021 | Conference Paper | LibreCat-ID: 30340
M. Hagemeyer, P. Wallmeier, F. Schafmeister, and J. Böcker, “Comparison of unidirectional Three- and Four-Wire based Boost PFC-Rectifier Topologies for Non-Isolated Three-Phase EV On-Board Chargers under Common-Mode Aspects,” in Proc. 36th IEEE Applied Power Electronics Conference (APEC), Phoenix, AZ, USA, 2021, pp. 569–576.
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2021 | Newspaper Article | LibreCat-ID: 30348
F. Schafmeister, “Transformerless On-Board Chargers at Three- and Single-Phase Operation: Compensation of LF Common-Mode Noise by the Internal DC/DC-Stage,” Power System Design (PSD) Web Magazine, 2021.
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2021 | Conference Paper | LibreCat-ID: 29938
R. Unruh, J. Lange, F. Schafmeister, and J. Böcker, “Adaptive Zero-Sequence Voltage Injection for Modular Solid-State Transformer to Compensate for Asymmetrical Fault Conditions,” presented at the 23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe), Ghent, Belgium, 2021, doi: https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542.
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2021 | Conference Paper | LibreCat-ID: 29899
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: 10.23919/EPE21ECCEEurope50061.2021.9570674.
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2021 | Conference Paper | LibreCat-ID: 29893
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: 10.1109/apec42165.2021.9487104.
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2020 | Conference Paper | LibreCat-ID: 29939
R. Unruh, F. Schafmeister, and J. Böcker, “Evaluation of MMCs for High-Power Low-Voltage DC-Applications in Combination with the Module LLC-Design,” presented at the 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe), Lyon, France, 2020, doi: 10.23919/epe20ecceeurope43536.2020.9215687.
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2020 | Conference Paper | LibreCat-ID: 29894
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: 10.23919/epe20ecceeurope43536.2020.9215736.
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2020 | Conference Paper | LibreCat-ID: 29896
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.
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2020 | Conference Paper | LibreCat-ID: 29898
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.
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2020 | Conference Paper | LibreCat-ID: 29874
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.
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2020 | Conference Paper | LibreCat-ID: 30339
M. E. Ahmmad, F. Schafmeister, and J. Böcker, “Practical Implementation and Verification of Simple-to-Implement Digital Current Observer for Half-Bridge Topologies,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 20 digital days), Nuremberg, Germany, 2020.
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2020 | Patent | LibreCat-ID: 30362
F. Schafmeister, “Apparatus and method for charging an electric battery vehicle.” 2020.
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2020 | Conference Paper | LibreCat-ID: 29880
R. Unruh, F. Schafmeister, and J. Böcker, “11kW, 70kHz LLC Converter Design with Adaptive Input Voltage for 98% Efficiency in an MMC,” 2020, doi: 10.1109/compel49091.2020.9265771.
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2020 | Conference Paper | LibreCat-ID: 29940
R. Unruh, F. Schafmeister, N. Fröhleke, and J. Böcker, “1-MW Full-Bridge MMC for High-Current Low-Voltage (100V-400V) DC-Applications,” presented at the PCIM Europe digital days 2020, Germany, 2020.
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2020 | Conference Paper | LibreCat-ID: 30001
B. Strothmann, T. Piepenbrock, F. Schafmeister, and J. Böcker, “Heat dissipation strategies for silicon carbide power SMDs and their use in different applications,” in PCIM Europe digital days 2020; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 2020, pp. 1–7.
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2019 | Conference Paper | LibreCat-ID: 29999
B. Strothmann, F. Schafmeister, and J. Böcker, “Common Mode Analysis of Non-Isolated Three-Phase EV-Charger for Bi-Directional Vehicle-to-Grid Operation,” in PCIM Europe 2019; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 2019, pp. 1–7.
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2019 | Conference Paper | LibreCat-ID: 30002
B. Strothmann, F. Schafmeister, and J. Böcker, “Pareto Design and Switching Frequencies for SiC MOSFETs Applied in an 11 kW Buck Converter for EV-Charging,” 2019, doi: 10.1109/apec.2019.8721850.
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