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100 Publications
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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: 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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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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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: 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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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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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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2019 | Conference Paper | LibreCat-ID: 16442
P. Rehlaender, T. Grote, F. Schafmeister, and J. Böcker, “Analytical Modeling and Design of an Active Clamp Forward Converter Applied as a Single-Stage On-Board DC-DC Converter for EVs,” presented at the PCIM Europe 2019, Nürnberg, 2019.
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2019 | Conference Paper | LibreCat-ID: 29942
R. Unruh, F. Schafmeister, N. Fröhleke, and J. Böcker, “MMC-Topology for High-Current and Low-Voltage Applications with Minimal Number of Submodules, Reduced Switching and Capacitor Losses,” presented at the PCIM Europe 2019, Nuremberg, Germany, 2019.
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2019 | Conference Paper | LibreCat-ID: 30334
L. Keuck, F. Schafmeister, and J. Böcker, “Computer-Aided Design and Optimization of an Integrated Transformer with Distributed Air Gap and Leakage Path for an LLC Resonant Converter,” in Proc. 34th IEEE Applied Power Electronics Conference (APEC), Anaheim, CA, USA, 2019, pp. 1415–1422.
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