Frank Schafmeister

Leistungselektronik und Elektrische Antriebstechnik (LEA)
schafmeister@lea.uni-paderborn.de
ID
71291

92 Publications

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[92]
2023 | Conference Paper | LibreCat-ID: 48352
Unruh, Roland, Joachim Böcker, and Frank Schafmeister. “An Optimized Third-Harmonic Injection Reduces DC-Link Voltage Ripple in Cascaded H-Bridge Converters up to 50% for All Power Factors.” In 2023 25th European Conference on Power Electronics and Applications (EPE’23 ECCE Europe). IEEE, 2023. https://doi.org/10.23919/epe23ecceeurope58414.2023.10264313.
LibreCat | DOI | Download (ext.)
 
[91]
2022 | Conference Abstract | LibreCat-ID: 30347
Schafmeister, Frank. “Compensation of LF Common-Mode Noise by the Internal DC/DC-Stage for Transformerless On-Board Chargers at Three- and Single-Phase Operation.” In International Conference on Electric & Electronic in Hybrid and Electric Vehicles and Electric Energy Management (EEHE),. Bamberg, Germany, n.d.
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[90]
2022 | Conference Paper | LibreCat-ID: 30349
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 Proc. 37th IEEE Applied Power Electronics Conference (APEC). Houston, TX, USA: IEEE, n.d.
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[89]
2022 | Conference Paper | LibreCat-ID: 30350
Keuck, Lukas, Frank Schafmeister, and Joachim Böcker. “Robust Hysteresis Control for LLC Resonant Converters Using a Fully Isolated Measurement Scheme.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, n.d.
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[88]
2022 | Conference Paper | LibreCat-ID: 30844
Huber, Jonas, Peter Wallmeier, Ralf Pieper, Frank Schafmeister, and Johann Kolar. “Comparative Evaluation of MVAC-LVDC SST and Hybrid Transformer Concepts for Future Datacenters.” In Proc. 9th IEEJ International Power Electronics Conference (IPEC). Himeji, Japan: IEE Japan, n.d.
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[87]
2022 | Conference Paper | LibreCat-ID: 35125
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 2022 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2022. https://doi.org/10.1109/apec43599.2022.9773701.
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[86]
2022 | Conference Paper | LibreCat-ID: 35127
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 PCIM Europe 2022; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 1–10, 2022. https://doi.org/10.30420/565822103.
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[85]
2022 | Journal Article | LibreCat-ID: 44163
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.” IEEE Transactions on Power Electronics 37, no. 11 (2022): 13413–27. https://doi.org/10.1109/tpel.2022.3180758.
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[84]
2022 | Conference Paper | LibreCat-ID: 44164
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 2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), P.1-P.11, 2022.
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[83]
2022 | Conference Paper | LibreCat-ID: 44161
Rehlaender, Philipp, Frank Schafmeister, and Joachim Böcker. “Phase-Shift Modulation for Flying-Capacitor DC-DC Converters.” In 2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), 1–9, 2022.
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[82]
2022 | Conference Paper | LibreCat-ID: 34176
Unruh, Roland, Frank Schafmeister, and Joachim Böcker. “Zero-Sequence Voltage Reduces DC-Link Capacitor Demand in Cascaded H-Bridge Converters for Large-Scale Electrolyzers by 40%.” In 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe). IEEE, 2022.
LibreCat | Download (ext.)
 
[81]
2022 | Conference Paper | LibreCat-ID: 35126
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 2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), P.1-P.9, 2022.
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[80]
2021 | Conference Paper | LibreCat-ID: 29849
Strothmann, Benjamin, Frank Schafmeister, and Joachim Böcker. “Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger.” In 2021 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2021. https://doi.org/10.1109/apec42165.2021.9487462.
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[79]
2021 | Journal Article | LibreCat-ID: 29892
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.” IEEE Transactions on Power Electronics 36, no. 9 (2021): 10065–80. https://doi.org/10.1109/tpel.2021.3067843.
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[78]
2021 | Conference Paper | LibreCat-ID: 29895
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 2021 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2021. https://doi.org/10.1109/apec42165.2021.9487130.
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[77]
2021 | Conference Paper | LibreCat-ID: 29850
Strothmann, Benjamin, Gerrit Book, Frank Schafmeister, and Joachim 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, 1–8, 2021.
LibreCat | Download (ext.)
 
[76]
2021 | Conference Paper | LibreCat-ID: 29871
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 2021 IEEE Applied Power Electronics Conference and Exposition (APEC), 2021.
LibreCat | Download (ext.)
 
[75]
2021 | Conference Paper | LibreCat-ID: 30340
Hagemeyer, Marc, Peter Wallmeier, Frank Schafmeister, and Joachim 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), 569–76. Phoenix, AZ, USA: IEEE, 2021.
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[74]
2021 | Newspaper Article | LibreCat-ID: 30348
Schafmeister, Frank. “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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[73]
2021 | Conference Paper | LibreCat-ID: 29938
Unruh, Roland, Jarren Lange, Frank Schafmeister, and Joachim Böcker. “Adaptive Zero-Sequence Voltage Injection for Modular Solid-State Transformer to Compensate for Asymmetrical Fault Conditions.” In 23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe). IEEE, 2021. https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542.
LibreCat | DOI | Download (ext.)
 
[72]
2021 | Conference Paper | LibreCat-ID: 29899
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 23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe). IEEE, 2021. https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570674.
LibreCat | DOI | Download (ext.)
 
[71]
2021 | Conference Paper | LibreCat-ID: 29893
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 2021 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2021. https://doi.org/10.1109/apec42165.2021.9487104.
LibreCat | DOI | Download (ext.)
 
[70]
2020 | Conference Paper | LibreCat-ID: 29939
Unruh, Roland, Frank Schafmeister, and Joachim Böcker. “Evaluation of MMCs for High-Power Low-Voltage DC-Applications in Combination with the Module LLC-Design.” In 2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe). IEEE, 2020. https://doi.org/10.23919/epe20ecceeurope43536.2020.9215687.
LibreCat | DOI | Download (ext.)
 
[69]
2020 | Conference Paper | LibreCat-ID: 29894
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 2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe). IEEE, 2020. https://doi.org/10.23919/epe20ecceeurope43536.2020.9215736.
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[68]
2020 | Conference Paper | LibreCat-ID: 29896
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 PCIM Europe Digital Days 2020, 2020.
LibreCat | Download (ext.)
 
[67]
2020 | Conference Paper | LibreCat-ID: 29898
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 PCIM Europe Digital Days 2020, 2020.
LibreCat | Download (ext.)
 
[66]
2020 | Conference Paper | LibreCat-ID: 29874
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 PCIM Europe Digital Days 2020, 2020.
LibreCat | Download (ext.)
 
[65]
2020 | Conference Paper | LibreCat-ID: 30339
Ahmmad, Mohsin Ejaz, Frank Schafmeister, and Joachim Böcker. “Practical Implementation and Verification of Simple-to-Implement Digital Current Observer for Half-Bridge Topologies.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM Digital Days). Nuremberg, Germany: IEEE, 2020.
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[64]
2020 | Patent | LibreCat-ID: 30362
Schafmeister, Frank. “Apparatus and Method for Charging an Electric Battery Vehicle,” 2020.
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[63]
2020 | Conference Paper | LibreCat-ID: 29880
Unruh, Roland, Frank Schafmeister, and Joachim Böcker. “11kW, 70kHz LLC Converter Design with Adaptive Input Voltage for 98% Efficiency in an MMC.” In 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL). IEEE, 2020. https://doi.org/10.1109/compel49091.2020.9265771.
LibreCat | DOI | Download (ext.)
 
[62]
2020 | Conference Paper | LibreCat-ID: 29940
Unruh, Roland, Frank Schafmeister, Norbert Fröhleke, and Joachim Böcker. “1-MW Full-Bridge MMC for High-Current Low-Voltage (100V-400V) DC-Applications.” In PCIM Europe Digital Days 2020; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. VDE, 2020.
LibreCat | Download (ext.)
 
[61]
2020 | Conference Paper | LibreCat-ID: 30001
Strothmann, Benjamin, Till Piepenbrock, Frank Schafmeister, and Joachim 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, 1–7, 2020.
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[60]
2019 | Conference Paper | LibreCat-ID: 29999
Strothmann, Benjamin, Frank Schafmeister, and Joachim 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, 1–7, 2019.
LibreCat | Download (ext.)
 
[59]
2019 | Conference Paper | LibreCat-ID: 30002
Strothmann, Benjamin, Frank Schafmeister, and Joachim Böcker. “Pareto Design and Switching Frequencies for SiC MOSFETs Applied in an 11 KW Buck Converter for EV-Charging.” In 2019 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2019. https://doi.org/10.1109/apec.2019.8721850.
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[58]
2019 | Conference Paper | LibreCat-ID: 16442
Rehlaender, Philipp, Tobias Grote, Frank Schafmeister, and Joachim Böcker. “Analytical Modeling and Design of an Active Clamp Forward Converter Applied as a Single-Stage On-Board DC-DC Converter for EVs.” In PCIM Europe 2019, 2019.
LibreCat | Download (ext.)
 
[57]
2019 | Conference Paper | LibreCat-ID: 29942
Unruh, Roland, Frank Schafmeister, Norbert Fröhleke, and Joachim Böcker. “MMC-Topology for High-Current and Low-Voltage Applications with Minimal Number of Submodules, Reduced Switching and Capacitor Losses.” In PCIM Europe 2019; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. VDE, 2019.
LibreCat | Download (ext.)
 
[56]
2019 | Conference Paper | LibreCat-ID: 30334
Keuck, Lukas, Frank Schafmeister, and Joachim 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), 1415–22. Anaheim, CA, USA: IEEE, 2019.
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[55]
2019 | Conference Paper | LibreCat-ID: 30335
Keuck, Lukas, Frank Schafmeister, Joachim Böcker, Herbert Jungwirth, and Michael Schmidhuber. “Computer-Aided Design and Optimization of an Integrated Transformer with Distributed Air Gap and Leakage Path for LLC Resonant Converter.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2019.
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[54]
2019 | Conference Paper | LibreCat-ID: 30337
Ahmad, Mohsin Ejaz, Frank Schafmeister, and Joachim Böcker. “Novel Current Measurement Concept for Half Bridge Topologies Based on Simple-to-Implement Digital Current Observer.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2019.
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[53]
2019 | Conference Paper | LibreCat-ID: 30336
Bolte, Sven, Frank Schafmeister, and Joachim Böcker. “LCC Resonant Converter for Piezoelectric Transducers with Phase Shift Control.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2019.
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[52]
2019 | Conference Paper | LibreCat-ID: 30338
Bolte, Sven, Frank Schafmeister, and Joachim Böcker. “Bidirectional Resonant Converter with Integrated Magnetics for On-Board Chargers.” In Proc. IEEE International Symposium on Industrial Electronics (ISIE), 770–74. Vancouver, Canada: IEEE, 2019.
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[51]
2019 | Conference Paper | LibreCat-ID: 30344
Rehlaender, Philipp, Tobias Grote, Frank Schafmeister, and Joachim Böcker. “Interleaved Active Clamp Forward Converters as Single Stage On-Board DC-DC Converters for EVs – an Accurate Model and Design Considerations.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2019.
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[50]
2019 | Conference Paper | LibreCat-ID: 30346
Rehlaender, Philipp, Tobias Grote, Sergey Tikhonov, Hugues Njiende, Frank Schafmeister, Joachim Böcker, and Peter Thiemann. “A PCB-Integrated Winding Using a Litz Structure for a Wireless Charging Coil.” In Proc. 21st European Conference on Power Electronics and Applications (EPE-ECCE Europe), 1–9. Genova, Italy: EPE, 2019.
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[49]
2019 | Conference Paper | LibreCat-ID: 30345
Rehlaender, Philipp, Tobias Grote, Frank Schafmeister, and Joachim Böcker. “Analytical Topology Comparison for a Single-Stage On-Board EV-Battery Converter.” In Proc. IEEE International Symposium on Industrial Electronics (ISIE), 2477–82. Vancouver, Canada: IEEE, 2019.
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[48]
2019 | Patent | LibreCat-ID: 30361
Pohlmann, Robert, and Frank Schafmeister. “Current Measurement Circuit for TCM-PFC,” 2019.
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[47]
2018 | Conference Paper | LibreCat-ID: 30331
Keuck, Lukas, A Munir, Frank Schafmeister, and Joachim Böcker. “Adaptive Frequency Control of DC-DC-Converters for Maximum Efficiency Using Artificial Neural Network.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2018.
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[46]
2018 | Conference Paper | LibreCat-ID: 30332
Keuck, Lukas, Noman Jabbar, Frank Schafmeister, and Joachim Böcker. “Switching Loss Characterization of Wide Band-Gap Devices by an Indirect Identification Methodology.” In Proc. 20th European Conference on Power Electronics and Applications (EPE-ECCE Europe), 1–10. Riga, Latvia: EPE, 2018.
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[45]
2018 | Conference Paper | LibreCat-ID: 30333
Hagemeyer, Marc, Frank Schafmeister, and Joachim Böcker. “Coupled Inductor Design for Interleaved High-Current DC-DC Converters.” In Proc. International Conference on Electrical Machines and Systems (ICEMS), 2316–21. Jeju, South-Korea: Korea IEE & IEE Japan, 2018.
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[44]
2017 | Patent | LibreCat-ID: 30358
Figge, Heiko, Frank Schafmeister, and Tobias Grote. “LLC Balancing,” 2017.
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[43]
2017 | Patent | LibreCat-ID: 30363
Wallmeier, Peter, and Frank Schafmeister. “Controller for an Inverter (PV Inverter: PV Self Consumption & Symm. Output Control),” 2017.
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[42]
2015 | Conference Paper | LibreCat-ID: 30330
Schafmeister, Frank, Tobias Grote, and Heiko Figge. “Today’s Relevance of Digital Control in Server- and Telecom Power Supplies.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2015.
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[41]
2015 | Patent | LibreCat-ID: 30359
Ide, Peter, Frank Schafmeister, Jörg Richter, Barzin Pour, Daniel Spesser, and Dietmar Herke. “Adaptable AC Input Phase Switching,” 2015.
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[40]
2015 | Patent | LibreCat-ID: 30360
Hufnagel, Michael, and Frank Schafmeister. “Resistorless Precharging,” 2015.
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[39]
2014 | Conference Paper | LibreCat-ID: 30327
Schafmeister, Frank, Peter Ide, and Jörg Richter. “Adaptable AC Input Phase Switching for Optimum Utilization of Various Grid Configurations Supplying Power Electronic Converters and EV/HEV On Board Chargers.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2014.
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[38]
2014 | Conference Paper | LibreCat-ID: 30329
Li, Ronggyuan, Hugues Njiende, Frank Schafmeister, and Peter Ide. “A Soft-Switching Interleaved DC-DC Converter with Integrated Magnetics for High Voltage Battery Charger.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2014.
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[37]
2014 | Conference Paper | LibreCat-ID: 30328
Schafmeister, Frank, Michael Hufnagel, and Peter Ide. “Resistorless Precharging of Boost PFCs by Phase Angle Control of Thyristors.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2014.
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[36]
2013 | Conference Paper | LibreCat-ID: 30326
Figge, Heiko, Tobias Grote, Norbert Fröhleke, Joachim Böcker, and Frank Schafmeister. “Two-Phase Interleaving Configuration of the LLC Resonant Converter - Analysis and Experimental Evaluation.” In Proc. IEEE Annual Industrial Electronics Society Conference (IECON), 1392–97. Vienna, Austria: IEEE, 2013.
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[35]
2013 | Patent | LibreCat-ID: 30357
Njiende, Hugues, Rongyuan Li, Frank Schafmeister, and Peter Ide. “Integrated Magnetic for DCM-PSFB Converter,” 2013.
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[34]
2013 | Patent | LibreCat-ID: 30356
Figge, Heiko, and Frank Schafmeister. “Resonant Capacitor Clamping Circuit in Resonant Converter,” 2013.
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[33]
2012 | Conference Paper | LibreCat-ID: 30325
Figge, Heiko, Norbert Fröhleke, Joachim Böcker, and Frank Schafmeister. “Cost-Effective Implementation of a Digitally Controlled LLC Resonant Converter for Application in Server- and Telecom-PSUs.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM), 1–8. Nuremberg, Germany: IEEE, 2012.
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[32]
2012 | Journal Article | LibreCat-ID: 30324
Schafmeister, Frank, and Johann Kolar. “Novel Hybrid Modulation Schemes Significantly Extending the Reactive Power Control Range of All Matrix Converter Topologies With Low Computational Effort.” IEEE Transactions on Power Electronics 59, no. 1 (2012): 194–210.
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[31]
2012 | Book Chapter | LibreCat-ID: 30343
Kolar, Johann, and Frank Schafmeister. “Matrixkonverter, Kapitel 3.8.” In Lehrbuch Leistungselektronische Schaltungen , edited by Dierk Schröder, 3rd ed., 195–296. Berlin Heidelberg: Springer Vieweg Verlag, 2012.
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[30]
2012 | Patent | LibreCat-ID: 30355
Schafmeister, Frank, and Tobias Grote. “Digital Slope Compensation for Current Mode Control,” 2012.
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[29]
2011 | Conference Paper | LibreCat-ID: 30323
Grote, Tobias, Heiko Figge, Norbert Fröhleke, Joachim Böcker, and Frank Schafmeister. “Digital Control Strategy for Multi-Phase Interleaved Boundary Mode and DCM Boost PFC Converters.” In Proc. IEEE Energy Conversion Congress and Exposition (ECCE), 3186–92. Phoenix, AZ, USA: IEEE, 2011.
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[28]
2011 | Conference Paper | LibreCat-ID: 30322
Figge, Heiko, Tobias Grote, Norbert Fröhleke, Joachim Böcker, and Frank Schafmeister. “Overcurrent Protection for the LLC Resonant Converter with Improved Hold-Up Time.” In Proc. 26th IEEE Applied Power Electronics Conference (APEC), 13–20. Fort Worth, TX, USA: IEEE, 2011.
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[27]
2011 | Patent | LibreCat-ID: 30354
Schafmeister, Frank, and Johann Kolar. “Unidirektionaler AC-AC-Matrixkonverter Mit Dreipunkt Ein- Und Ausgangsstufe,” 2011.
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[26]
2011 | Patent | LibreCat-ID: 30353
Schafmeister, Frank, and Johann Kolar. “Verfahren Zum Spannungslosen Schalten Der Pulswechselrichter-Ausgangsstufe Eines Indirekten Dreiphasen-AC-AC Matrixkonverters,” 2011.
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[25]
2010 | Conference Paper | LibreCat-ID: 30321
Schafmeister, Frank, Xudong Wang, Tobias Grote, and Peter Ide. “Scalable Multi Phase Interleaved Boundary Mode PFC Concept Enabling Energy- and Cost Efficient PSUs in the KW-Range.” In Proc. IEEE International Symposium on Industrial Electronics (ISIE), 3831–35. Bari, Italy: IEEE, 2010.
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[24]
2009 | Conference Paper | LibreCat-ID: 30319
Grote, Tobias, FHeiko Figge, Norbert Fröhleke, Winfried Beulen, Frank Schafmeister, Peter Ide, and Joachim Böcker. “Semi-Digital Interleaved PFC Control with Optimized Light Load Efficiency.” In Proc. 24th IEEE Applied Power Electronics Conference (APEC), 1722–27. Washington D.C., USA: IEEE, 2009.
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[23]
2009 | Conference Paper | LibreCat-ID: 30320
Grote, Tobias, Frank Schafmeister, Heiko Figge, Norbert Fröhleke, Peter Ide, and Joachim Böcker. “Adaptive Digital Slope Compensation for Peak Current Mode Control.” In Proc. IEEE Energy Conversion Congress and Exposition (ECCE), 3523–29. San Jose, CA, USA: IEEE, 2009.
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[22]
2009 | Patent | LibreCat-ID: 30351
Schafmeister, Frank, and Johann Kolar. “Verfahren Zur Nutzung Des Ausgangsseitigen Blindstromes Eines Indirekten Dreiphasen-Matrixkonverters Zur Erzeugung von Eingangsblindstrom,” 2009.
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[21]
2009 | Conference Paper | LibreCat-ID: 30517
Grote, T., Frank Schafmeister, H. Figge, N. Fröhleke, P. Ide, and Joachim Böcker. “Adaptive Digital Slope Compensation for Peak Current Mode Control.” In 2009 IEEE Energy Conversion Congress and Exposition. IEEE, 2009. https://doi.org/10.1109/ecce.2009.5316380.
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[20]
2008 | Conference Paper | LibreCat-ID: 30318
Figge, Heiko, Norbert Fröhleke, Frank Schafmeister, and Peter Ide. “Paralleling of LLC Resonant Converters Using Frequency Controlled Current Balancing.” In Proc. DPEC Seminar. Shanghai, China: Delta Electronics, 2008.
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[19]
2008 | Conference Paper | LibreCat-ID: 30317
Grote, Tobias, Norbert Fröhleke, Frank Schafmeister, and Peter Ide. “Semi-Digital Interleaved PFC Control.” In Proc. DPEC Seminar. Shanghai, China: Delta Electronics, 2008.
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[18]
2008 | Book Chapter | LibreCat-ID: 30316
Kolar, Johann, and Frank Schafmeister. “Matrixkonverter, Kapitel 3.8.” In Lehrbuch Leistungselektronische Schaltungen, edited by Dierk Schröder, 2nd ed., 188–289. Berlin Heidelberg: Springer-Verlag, 2008.
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[17]
2007 | Patent | LibreCat-ID: 30352
Kolar, Johann, and Frank Schafmeister. “Verfahren Zur Minimierung Der Schaltverluste Eines Quasi-Direkten Dreiphasen-AC/AC-Pulsumrichters Bei Geringer Amplitude Der Ausgangsspannungsgrundschwingung,” 2007.
LibreCat
 
[16]
2007 | Journal Article | LibreCat-ID: 30314
Kolar, Johann, Frank Schafmeister, Simon Round, and Hans Ertl. “Novel Three-Phase AC–AC Sparse Matrix Converters.” IEEE Transactions on Power Electronics 22, no. 5 (2007): 1649–61.
LibreCat
 
[15]
2007 | Dissertation | LibreCat-ID: 30315
Schafmeister, Frank. Indirekte Sparse Matrix Konverter. DISS. ETH Nr. 17428. Zürich, Switzerland: ETH Zürich, 2007.
LibreCat | Files available
 
[14]
2006 | Journal Article | LibreCat-ID: 30313
Round, Simon, Frank Schafmeister, and Johann Kolar. “Comparison of Performance and Realization Effort of a Very Sparse Matrix Converter to a Voltage DC Link PWM Inverter with Active Front End.” IEEJ Transactions of the Institute of Electrical Engineers of Japan 126-D, no. 5 (2006): 578–88.
LibreCat
 
[13]
2005 | Conference Paper | LibreCat-ID: 30312
Round, Simon, Frank Schafmeister, Eduardo Pereira, Leonardo Serpa, and Johann Kolar. “Comparison of Performance and Realization Effort of a Very Sparse Matrix Converter to a Voltage DC Link PWM Inverter with Active Front End.” In Proc. 5th IEEJ International Power Electronics Conference (IPEC). Niigata, Japan: IEEJapan, 2005.
LibreCat
 
[12]
2005 | Conference Paper | LibreCat-ID: 30301
Schafmeister, Frank, Christoph Rytz, and Johann Kolar. “Analytical Calculation of the Conduction and Switching Losses of the Conventional Matrix Converter and the (Very) Sparse Matrix Converter.” In Proc. 20th IEEE Applied Power Electronics Conference (APEC), 2:875–81. Austin, USA: IEEE, 2005.
LibreCat
 
[11]
2005 | Journal Article | LibreCat-ID: 30311
Ide, Peter, Frank Schafmeister, Norbert Fröhleke, and Horst Grotstollen. “Enhanced Control Scheme for Three-Phase, Three-Level Rectifiers at Partial Load.” IEEE Transactions on Industrial Electronics 52, no. 3 (2005): 719–26.
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[10]
2004 | Conference Paper | LibreCat-ID: 30309
Schafmeister, Frank, and Johann Kolar. “Novel Modulation Schemes for Conventional and Sparse Matrix Converters Facilitating Reactive Power Transfer Independent of Active Power Flow.” In Proc. 35th IEEE Power Electronics Specialists Conference (PESC), 4:2917–23. Aachen, Germany: IEEE, 2004.
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[9]
2004 | Conference Paper | LibreCat-ID: 30308
Ide, Peter , Frank Schafmeister, Norbert Fröhleke, and Horst Grotstollen. “Enhanced Control Scheme for Three-Phase / Three-Level Rectifiers at Partial Load.” In Proc. 35th IEEE Power Electronics Specialists Conference (PESC), 1:207–13. Aachen, Germany: IEEE, 2004.
LibreCat
 
[8]
2004 | Conference Paper | LibreCat-ID: 30310
Schafmeister, Frank, and Johann Kolar. “Novel Hybrid Modulation Schemes Extending the Reactive Power Control Range of Conventional and Sparse Matrix Converters Operating at Maximum Output Voltage.” In Proc. 11th International Power Electronics and Motion Control Conference (EPE-PEMC). Riga, Latvia: EPE, 2004.
LibreCat
 
[7]
2003 | Conference Paper | LibreCat-ID: 30307
Schafmeister, Frank, and Johann Kolar. “Novel Modulation Schemes Minimizing the Switching Losses of Sparse Matrix Converters.” In Proc. IEEE Annual Industrial Electronics Society Conference (IECON), 2085–90. Roanoke, VA, USA: IEEE, 2003.
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[6]
2003 | Conference Paper | LibreCat-ID: 30300
Schafmeister, Frank, Simon Herold, and Johann Kolar. “Evaluation of 1200V-Si-IGBTs and 1300V-SiC-JFETs for Application in Three-Phase Very Sparse Matrix AC-AC Converter Systems.” In Proc. 18th IEEE Applied Power Electronics Conf. (APEC), 1:241–55. Miami Beach, USA: IEEE, 2003.
LibreCat
 
[5]
2003 | Journal Article | LibreCat-ID: 30306
Schafmeister, Frank, Martina Baumann, and Johann Kolar. “Analytically Closed Calculation of the Conduction Losses of Three-Phase AC-AC Sparse Matrix Converters.” EPE Journal 13, no. 1 (2003): 5–14.
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[4]
2002 | Conference Paper | LibreCat-ID: 30302
Schafmeister, Frank, Martina Baumann, and Johann Kolar. “Analytically Closed Calculation of the Conduction and Switching Losses of Three-Phase AC-AC Sparse Matrix Converters.” In Proc. 10th International Power Electronics and Motion Control Conference (EPE-PEMC). Cavtat & Dubrovnik, Croatia: EPE, 2002.
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[3]
2002 | Conference Paper | LibreCat-ID: 30299
Kolar, Johann, Martina Baumann, Frank Schafmeister, and Hans Ertl. “Novel Three-Phase AC-DC-AC Sparse Matrix Converter.” In Proc. 17th IEEE Applied Power Electronics Conf. (APEC), 2:777–91. Dallas, USA: IEEE, 2002.
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[2]
2002 | Conference Paper | LibreCat-ID: 30305
Schafmeister, Frank, and Johann Kolar. “Analyse der Regelung einer permanenterregten Synchronmaschine bei Speisung durch einen dreiphasigen Sparse-Matrix-Konverter.” In Proc. Ansoft Inspiring Design Workshop. Stuttgart, Germany, 2002.
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[1]
2001 | Conference Paper | LibreCat-ID: 30124
Ide, Peter, Frank Schafmeister, and Norbert Fröhleke. “Active Common-Mode Voltage Cancellation for Three-Phase PWM Rectifier/Inverter Systems Based on a New Topology.” In Proc. 16th IEEE Applied Power Electronics Conf. (APEC), 1:201–7. Anaheim, USA: IEEE, 2001.
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[92]
2023 | Conference Paper | LibreCat-ID: 48352
Unruh, Roland, Joachim Böcker, and Frank Schafmeister. “An Optimized Third-Harmonic Injection Reduces DC-Link Voltage Ripple in Cascaded H-Bridge Converters up to 50% for All Power Factors.” In 2023 25th European Conference on Power Electronics and Applications (EPE’23 ECCE Europe). IEEE, 2023. https://doi.org/10.23919/epe23ecceeurope58414.2023.10264313.
LibreCat | DOI | Download (ext.)
 
[91]
2022 | Conference Abstract | LibreCat-ID: 30347
Schafmeister, Frank. “Compensation of LF Common-Mode Noise by the Internal DC/DC-Stage for Transformerless On-Board Chargers at Three- and Single-Phase Operation.” In International Conference on Electric & Electronic in Hybrid and Electric Vehicles and Electric Energy Management (EEHE),. Bamberg, Germany, n.d.
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[90]
2022 | Conference Paper | LibreCat-ID: 30349
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 Proc. 37th IEEE Applied Power Electronics Conference (APEC). Houston, TX, USA: IEEE, n.d.
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[89]
2022 | Conference Paper | LibreCat-ID: 30350
Keuck, Lukas, Frank Schafmeister, and Joachim Böcker. “Robust Hysteresis Control for LLC Resonant Converters Using a Fully Isolated Measurement Scheme.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, n.d.
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[88]
2022 | Conference Paper | LibreCat-ID: 30844
Huber, Jonas, Peter Wallmeier, Ralf Pieper, Frank Schafmeister, and Johann Kolar. “Comparative Evaluation of MVAC-LVDC SST and Hybrid Transformer Concepts for Future Datacenters.” In Proc. 9th IEEJ International Power Electronics Conference (IPEC). Himeji, Japan: IEE Japan, n.d.
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[87]
2022 | Conference Paper | LibreCat-ID: 35125
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 2022 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2022. https://doi.org/10.1109/apec43599.2022.9773701.
LibreCat | DOI
 
[86]
2022 | Conference Paper | LibreCat-ID: 35127
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 PCIM Europe 2022; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 1–10, 2022. https://doi.org/10.30420/565822103.
LibreCat | DOI
 
[85]
2022 | Journal Article | LibreCat-ID: 44163
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.” IEEE Transactions on Power Electronics 37, no. 11 (2022): 13413–27. https://doi.org/10.1109/tpel.2022.3180758.
LibreCat | DOI
 
[84]
2022 | Conference Paper | LibreCat-ID: 44164
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 2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), P.1-P.11, 2022.
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[83]
2022 | Conference Paper | LibreCat-ID: 44161
Rehlaender, Philipp, Frank Schafmeister, and Joachim Böcker. “Phase-Shift Modulation for Flying-Capacitor DC-DC Converters.” In 2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), 1–9, 2022.
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[82]
2022 | Conference Paper | LibreCat-ID: 34176
Unruh, Roland, Frank Schafmeister, and Joachim Böcker. “Zero-Sequence Voltage Reduces DC-Link Capacitor Demand in Cascaded H-Bridge Converters for Large-Scale Electrolyzers by 40%.” In 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe). IEEE, 2022.
LibreCat | Download (ext.)
 
[81]
2022 | Conference Paper | LibreCat-ID: 35126
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 2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), P.1-P.9, 2022.
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[80]
2021 | Conference Paper | LibreCat-ID: 29849
Strothmann, Benjamin, Frank Schafmeister, and Joachim Böcker. “Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger.” In 2021 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2021. https://doi.org/10.1109/apec42165.2021.9487462.
LibreCat | DOI
 
[79]
2021 | Journal Article | LibreCat-ID: 29892
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.” IEEE Transactions on Power Electronics 36, no. 9 (2021): 10065–80. https://doi.org/10.1109/tpel.2021.3067843.
LibreCat | DOI
 
[78]
2021 | Conference Paper | LibreCat-ID: 29895
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 2021 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2021. https://doi.org/10.1109/apec42165.2021.9487130.
LibreCat | DOI
 
[77]
2021 | Conference Paper | LibreCat-ID: 29850
Strothmann, Benjamin, Gerrit Book, Frank Schafmeister, and Joachim 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, 1–8, 2021.
LibreCat | Download (ext.)
 
[76]
2021 | Conference Paper | LibreCat-ID: 29871
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 2021 IEEE Applied Power Electronics Conference and Exposition (APEC), 2021.
LibreCat | Download (ext.)
 
[75]
2021 | Conference Paper | LibreCat-ID: 30340
Hagemeyer, Marc, Peter Wallmeier, Frank Schafmeister, and Joachim 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), 569–76. Phoenix, AZ, USA: IEEE, 2021.
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[74]
2021 | Newspaper Article | LibreCat-ID: 30348
Schafmeister, Frank. “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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[73]
2021 | Conference Paper | LibreCat-ID: 29938
Unruh, Roland, Jarren Lange, Frank Schafmeister, and Joachim Böcker. “Adaptive Zero-Sequence Voltage Injection for Modular Solid-State Transformer to Compensate for Asymmetrical Fault Conditions.” In 23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe). IEEE, 2021. https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570542.
LibreCat | DOI | Download (ext.)
 
[72]
2021 | Conference Paper | LibreCat-ID: 29899
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 23rd European Conference on Power Electronics and Applications (EPE’21 ECCE Europe). IEEE, 2021. https://doi.org/10.23919/EPE21ECCEEurope50061.2021.9570674.
LibreCat | DOI | Download (ext.)
 
[71]
2021 | Conference Paper | LibreCat-ID: 29893
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 2021 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2021. https://doi.org/10.1109/apec42165.2021.9487104.
LibreCat | DOI | Download (ext.)
 
[70]
2020 | Conference Paper | LibreCat-ID: 29939
Unruh, Roland, Frank Schafmeister, and Joachim Böcker. “Evaluation of MMCs for High-Power Low-Voltage DC-Applications in Combination with the Module LLC-Design.” In 2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe). IEEE, 2020. https://doi.org/10.23919/epe20ecceeurope43536.2020.9215687.
LibreCat | DOI | Download (ext.)
 
[69]
2020 | Conference Paper | LibreCat-ID: 29894
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 2020 22nd European Conference on Power Electronics and Applications (EPE’20 ECCE Europe). IEEE, 2020. https://doi.org/10.23919/epe20ecceeurope43536.2020.9215736.
LibreCat | DOI
 
[68]
2020 | Conference Paper | LibreCat-ID: 29896
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 PCIM Europe Digital Days 2020, 2020.
LibreCat | Download (ext.)
 
[67]
2020 | Conference Paper | LibreCat-ID: 29898
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 PCIM Europe Digital Days 2020, 2020.
LibreCat | Download (ext.)
 
[66]
2020 | Conference Paper | LibreCat-ID: 29874
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 PCIM Europe Digital Days 2020, 2020.
LibreCat | Download (ext.)
 
[65]
2020 | Conference Paper | LibreCat-ID: 30339
Ahmmad, Mohsin Ejaz, Frank Schafmeister, and Joachim Böcker. “Practical Implementation and Verification of Simple-to-Implement Digital Current Observer for Half-Bridge Topologies.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM Digital Days). Nuremberg, Germany: IEEE, 2020.
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[64]
2020 | Patent | LibreCat-ID: 30362
Schafmeister, Frank. “Apparatus and Method for Charging an Electric Battery Vehicle,” 2020.
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[63]
2020 | Conference Paper | LibreCat-ID: 29880
Unruh, Roland, Frank Schafmeister, and Joachim Böcker. “11kW, 70kHz LLC Converter Design with Adaptive Input Voltage for 98% Efficiency in an MMC.” In 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL). IEEE, 2020. https://doi.org/10.1109/compel49091.2020.9265771.
LibreCat | DOI | Download (ext.)
 
[62]
2020 | Conference Paper | LibreCat-ID: 29940
Unruh, Roland, Frank Schafmeister, Norbert Fröhleke, and Joachim Böcker. “1-MW Full-Bridge MMC for High-Current Low-Voltage (100V-400V) DC-Applications.” In PCIM Europe Digital Days 2020; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. VDE, 2020.
LibreCat | Download (ext.)
 
[61]
2020 | Conference Paper | LibreCat-ID: 30001
Strothmann, Benjamin, Till Piepenbrock, Frank Schafmeister, and Joachim 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, 1–7, 2020.
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[60]
2019 | Conference Paper | LibreCat-ID: 29999
Strothmann, Benjamin, Frank Schafmeister, and Joachim 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, 1–7, 2019.
LibreCat | Download (ext.)
 
[59]
2019 | Conference Paper | LibreCat-ID: 30002
Strothmann, Benjamin, Frank Schafmeister, and Joachim Böcker. “Pareto Design and Switching Frequencies for SiC MOSFETs Applied in an 11 KW Buck Converter for EV-Charging.” In 2019 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2019. https://doi.org/10.1109/apec.2019.8721850.
LibreCat | DOI
 
[58]
2019 | Conference Paper | LibreCat-ID: 16442
Rehlaender, Philipp, Tobias Grote, Frank Schafmeister, and Joachim Böcker. “Analytical Modeling and Design of an Active Clamp Forward Converter Applied as a Single-Stage On-Board DC-DC Converter for EVs.” In PCIM Europe 2019, 2019.
LibreCat | Download (ext.)
 
[57]
2019 | Conference Paper | LibreCat-ID: 29942
Unruh, Roland, Frank Schafmeister, Norbert Fröhleke, and Joachim Böcker. “MMC-Topology for High-Current and Low-Voltage Applications with Minimal Number of Submodules, Reduced Switching and Capacitor Losses.” In PCIM Europe 2019; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management. VDE, 2019.
LibreCat | Download (ext.)
 
[56]
2019 | Conference Paper | LibreCat-ID: 30334
Keuck, Lukas, Frank Schafmeister, and Joachim 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), 1415–22. Anaheim, CA, USA: IEEE, 2019.
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[55]
2019 | Conference Paper | LibreCat-ID: 30335
Keuck, Lukas, Frank Schafmeister, Joachim Böcker, Herbert Jungwirth, and Michael Schmidhuber. “Computer-Aided Design and Optimization of an Integrated Transformer with Distributed Air Gap and Leakage Path for LLC Resonant Converter.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2019.
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[54]
2019 | Conference Paper | LibreCat-ID: 30337
Ahmad, Mohsin Ejaz, Frank Schafmeister, and Joachim Böcker. “Novel Current Measurement Concept for Half Bridge Topologies Based on Simple-to-Implement Digital Current Observer.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2019.
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[53]
2019 | Conference Paper | LibreCat-ID: 30336
Bolte, Sven, Frank Schafmeister, and Joachim Böcker. “LCC Resonant Converter for Piezoelectric Transducers with Phase Shift Control.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2019.
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[52]
2019 | Conference Paper | LibreCat-ID: 30338
Bolte, Sven, Frank Schafmeister, and Joachim Böcker. “Bidirectional Resonant Converter with Integrated Magnetics for On-Board Chargers.” In Proc. IEEE International Symposium on Industrial Electronics (ISIE), 770–74. Vancouver, Canada: IEEE, 2019.
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[51]
2019 | Conference Paper | LibreCat-ID: 30344
Rehlaender, Philipp, Tobias Grote, Frank Schafmeister, and Joachim Böcker. “Interleaved Active Clamp Forward Converters as Single Stage On-Board DC-DC Converters for EVs – an Accurate Model and Design Considerations.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2019.
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[50]
2019 | Conference Paper | LibreCat-ID: 30346
Rehlaender, Philipp, Tobias Grote, Sergey Tikhonov, Hugues Njiende, Frank Schafmeister, Joachim Böcker, and Peter Thiemann. “A PCB-Integrated Winding Using a Litz Structure for a Wireless Charging Coil.” In Proc. 21st European Conference on Power Electronics and Applications (EPE-ECCE Europe), 1–9. Genova, Italy: EPE, 2019.
LibreCat
 
[49]
2019 | Conference Paper | LibreCat-ID: 30345
Rehlaender, Philipp, Tobias Grote, Frank Schafmeister, and Joachim Böcker. “Analytical Topology Comparison for a Single-Stage On-Board EV-Battery Converter.” In Proc. IEEE International Symposium on Industrial Electronics (ISIE), 2477–82. Vancouver, Canada: IEEE, 2019.
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[48]
2019 | Patent | LibreCat-ID: 30361
Pohlmann, Robert, and Frank Schafmeister. “Current Measurement Circuit for TCM-PFC,” 2019.
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[47]
2018 | Conference Paper | LibreCat-ID: 30331
Keuck, Lukas, A Munir, Frank Schafmeister, and Joachim Böcker. “Adaptive Frequency Control of DC-DC-Converters for Maximum Efficiency Using Artificial Neural Network.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2018.
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[46]
2018 | Conference Paper | LibreCat-ID: 30332
Keuck, Lukas, Noman Jabbar, Frank Schafmeister, and Joachim Böcker. “Switching Loss Characterization of Wide Band-Gap Devices by an Indirect Identification Methodology.” In Proc. 20th European Conference on Power Electronics and Applications (EPE-ECCE Europe), 1–10. Riga, Latvia: EPE, 2018.
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[45]
2018 | Conference Paper | LibreCat-ID: 30333
Hagemeyer, Marc, Frank Schafmeister, and Joachim Böcker. “Coupled Inductor Design for Interleaved High-Current DC-DC Converters.” In Proc. International Conference on Electrical Machines and Systems (ICEMS), 2316–21. Jeju, South-Korea: Korea IEE & IEE Japan, 2018.
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[44]
2017 | Patent | LibreCat-ID: 30358
Figge, Heiko, Frank Schafmeister, and Tobias Grote. “LLC Balancing,” 2017.
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[43]
2017 | Patent | LibreCat-ID: 30363
Wallmeier, Peter, and Frank Schafmeister. “Controller for an Inverter (PV Inverter: PV Self Consumption & Symm. Output Control),” 2017.
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[42]
2015 | Conference Paper | LibreCat-ID: 30330
Schafmeister, Frank, Tobias Grote, and Heiko Figge. “Today’s Relevance of Digital Control in Server- and Telecom Power Supplies.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2015.
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[41]
2015 | Patent | LibreCat-ID: 30359
Ide, Peter, Frank Schafmeister, Jörg Richter, Barzin Pour, Daniel Spesser, and Dietmar Herke. “Adaptable AC Input Phase Switching,” 2015.
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[40]
2015 | Patent | LibreCat-ID: 30360
Hufnagel, Michael, and Frank Schafmeister. “Resistorless Precharging,” 2015.
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[39]
2014 | Conference Paper | LibreCat-ID: 30327
Schafmeister, Frank, Peter Ide, and Jörg Richter. “Adaptable AC Input Phase Switching for Optimum Utilization of Various Grid Configurations Supplying Power Electronic Converters and EV/HEV On Board Chargers.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2014.
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[38]
2014 | Conference Paper | LibreCat-ID: 30329
Li, Ronggyuan, Hugues Njiende, Frank Schafmeister, and Peter Ide. “A Soft-Switching Interleaved DC-DC Converter with Integrated Magnetics for High Voltage Battery Charger.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2014.
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[37]
2014 | Conference Paper | LibreCat-ID: 30328
Schafmeister, Frank, Michael Hufnagel, and Peter Ide. “Resistorless Precharging of Boost PFCs by Phase Angle Control of Thyristors.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM). Nuremberg, Germany: IEEE, 2014.
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[36]
2013 | Conference Paper | LibreCat-ID: 30326
Figge, Heiko, Tobias Grote, Norbert Fröhleke, Joachim Böcker, and Frank Schafmeister. “Two-Phase Interleaving Configuration of the LLC Resonant Converter - Analysis and Experimental Evaluation.” In Proc. IEEE Annual Industrial Electronics Society Conference (IECON), 1392–97. Vienna, Austria: IEEE, 2013.
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[35]
2013 | Patent | LibreCat-ID: 30357
Njiende, Hugues, Rongyuan Li, Frank Schafmeister, and Peter Ide. “Integrated Magnetic for DCM-PSFB Converter,” 2013.
LibreCat
 
[34]
2013 | Patent | LibreCat-ID: 30356
Figge, Heiko, and Frank Schafmeister. “Resonant Capacitor Clamping Circuit in Resonant Converter,” 2013.
LibreCat
 
[33]
2012 | Conference Paper | LibreCat-ID: 30325
Figge, Heiko, Norbert Fröhleke, Joachim Böcker, and Frank Schafmeister. “Cost-Effective Implementation of a Digitally Controlled LLC Resonant Converter for Application in Server- and Telecom-PSUs.” In Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM), 1–8. Nuremberg, Germany: IEEE, 2012.
LibreCat
 
[32]
2012 | Journal Article | LibreCat-ID: 30324
Schafmeister, Frank, and Johann Kolar. “Novel Hybrid Modulation Schemes Significantly Extending the Reactive Power Control Range of All Matrix Converter Topologies With Low Computational Effort.” IEEE Transactions on Power Electronics 59, no. 1 (2012): 194–210.
LibreCat
 
[31]
2012 | Book Chapter | LibreCat-ID: 30343
Kolar, Johann, and Frank Schafmeister. “Matrixkonverter, Kapitel 3.8.” In Lehrbuch Leistungselektronische Schaltungen , edited by Dierk Schröder, 3rd ed., 195–296. Berlin Heidelberg: Springer Vieweg Verlag, 2012.
LibreCat
 
[30]
2012 | Patent | LibreCat-ID: 30355
Schafmeister, Frank, and Tobias Grote. “Digital Slope Compensation for Current Mode Control,” 2012.
LibreCat
 
[29]
2011 | Conference Paper | LibreCat-ID: 30323
Grote, Tobias, Heiko Figge, Norbert Fröhleke, Joachim Böcker, and Frank Schafmeister. “Digital Control Strategy for Multi-Phase Interleaved Boundary Mode and DCM Boost PFC Converters.” In Proc. IEEE Energy Conversion Congress and Exposition (ECCE), 3186–92. Phoenix, AZ, USA: IEEE, 2011.
LibreCat
 
[28]
2011 | Conference Paper | LibreCat-ID: 30322
Figge, Heiko, Tobias Grote, Norbert Fröhleke, Joachim Böcker, and Frank Schafmeister. “Overcurrent Protection for the LLC Resonant Converter with Improved Hold-Up Time.” In Proc. 26th IEEE Applied Power Electronics Conference (APEC), 13–20. Fort Worth, TX, USA: IEEE, 2011.
LibreCat
 
[27]
2011 | Patent | LibreCat-ID: 30354
Schafmeister, Frank, and Johann Kolar. “Unidirektionaler AC-AC-Matrixkonverter Mit Dreipunkt Ein- Und Ausgangsstufe,” 2011.
LibreCat
 
[26]
2011 | Patent | LibreCat-ID: 30353
Schafmeister, Frank, and Johann Kolar. “Verfahren Zum Spannungslosen Schalten Der Pulswechselrichter-Ausgangsstufe Eines Indirekten Dreiphasen-AC-AC Matrixkonverters,” 2011.
LibreCat
 
[25]
2010 | Conference Paper | LibreCat-ID: 30321
Schafmeister, Frank, Xudong Wang, Tobias Grote, and Peter Ide. “Scalable Multi Phase Interleaved Boundary Mode PFC Concept Enabling Energy- and Cost Efficient PSUs in the KW-Range.” In Proc. IEEE International Symposium on Industrial Electronics (ISIE), 3831–35. Bari, Italy: IEEE, 2010.
LibreCat
 
[24]
2009 | Conference Paper | LibreCat-ID: 30319
Grote, Tobias, FHeiko Figge, Norbert Fröhleke, Winfried Beulen, Frank Schafmeister, Peter Ide, and Joachim Böcker. “Semi-Digital Interleaved PFC Control with Optimized Light Load Efficiency.” In Proc. 24th IEEE Applied Power Electronics Conference (APEC), 1722–27. Washington D.C., USA: IEEE, 2009.
LibreCat
 
[23]
2009 | Conference Paper | LibreCat-ID: 30320
Grote, Tobias, Frank Schafmeister, Heiko Figge, Norbert Fröhleke, Peter Ide, and Joachim Böcker. “Adaptive Digital Slope Compensation for Peak Current Mode Control.” In Proc. IEEE Energy Conversion Congress and Exposition (ECCE), 3523–29. San Jose, CA, USA: IEEE, 2009.
LibreCat
 
[22]
2009 | Patent | LibreCat-ID: 30351
Schafmeister, Frank, and Johann Kolar. “Verfahren Zur Nutzung Des Ausgangsseitigen Blindstromes Eines Indirekten Dreiphasen-Matrixkonverters Zur Erzeugung von Eingangsblindstrom,” 2009.
LibreCat
 
[21]
2009 | Conference Paper | LibreCat-ID: 30517
Grote, T., Frank Schafmeister, H. Figge, N. Fröhleke, P. Ide, and Joachim Böcker. “Adaptive Digital Slope Compensation for Peak Current Mode Control.” In 2009 IEEE Energy Conversion Congress and Exposition. IEEE, 2009. https://doi.org/10.1109/ecce.2009.5316380.
LibreCat | DOI
 
[20]
2008 | Conference Paper | LibreCat-ID: 30318
Figge, Heiko, Norbert Fröhleke, Frank Schafmeister, and Peter Ide. “Paralleling of LLC Resonant Converters Using Frequency Controlled Current Balancing.” In Proc. DPEC Seminar. Shanghai, China: Delta Electronics, 2008.
LibreCat
 
[19]
2008 | Conference Paper | LibreCat-ID: 30317
Grote, Tobias, Norbert Fröhleke, Frank Schafmeister, and Peter Ide. “Semi-Digital Interleaved PFC Control.” In Proc. DPEC Seminar. Shanghai, China: Delta Electronics, 2008.
LibreCat
 
[18]
2008 | Book Chapter | LibreCat-ID: 30316
Kolar, Johann, and Frank Schafmeister. “Matrixkonverter, Kapitel 3.8.” In Lehrbuch Leistungselektronische Schaltungen, edited by Dierk Schröder, 2nd ed., 188–289. Berlin Heidelberg: Springer-Verlag, 2008.
LibreCat
 
[17]
2007 | Patent | LibreCat-ID: 30352
Kolar, Johann, and Frank Schafmeister. “Verfahren Zur Minimierung Der Schaltverluste Eines Quasi-Direkten Dreiphasen-AC/AC-Pulsumrichters Bei Geringer Amplitude Der Ausgangsspannungsgrundschwingung,” 2007.
LibreCat
 
[16]
2007 | Journal Article | LibreCat-ID: 30314
Kolar, Johann, Frank Schafmeister, Simon Round, and Hans Ertl. “Novel Three-Phase AC–AC Sparse Matrix Converters.” IEEE Transactions on Power Electronics 22, no. 5 (2007): 1649–61.
LibreCat
 
[15]
2007 | Dissertation | LibreCat-ID: 30315
Schafmeister, Frank. Indirekte Sparse Matrix Konverter. DISS. ETH Nr. 17428. Zürich, Switzerland: ETH Zürich, 2007.
LibreCat | Files available
 
[14]
2006 | Journal Article | LibreCat-ID: 30313
Round, Simon, Frank Schafmeister, and Johann Kolar. “Comparison of Performance and Realization Effort of a Very Sparse Matrix Converter to a Voltage DC Link PWM Inverter with Active Front End.” IEEJ Transactions of the Institute of Electrical Engineers of Japan 126-D, no. 5 (2006): 578–88.
LibreCat
 
[13]
2005 | Conference Paper | LibreCat-ID: 30312
Round, Simon, Frank Schafmeister, Eduardo Pereira, Leonardo Serpa, and Johann Kolar. “Comparison of Performance and Realization Effort of a Very Sparse Matrix Converter to a Voltage DC Link PWM Inverter with Active Front End.” In Proc. 5th IEEJ International Power Electronics Conference (IPEC). Niigata, Japan: IEEJapan, 2005.
LibreCat
 
[12]
2005 | Conference Paper | LibreCat-ID: 30301
Schafmeister, Frank, Christoph Rytz, and Johann Kolar. “Analytical Calculation of the Conduction and Switching Losses of the Conventional Matrix Converter and the (Very) Sparse Matrix Converter.” In Proc. 20th IEEE Applied Power Electronics Conference (APEC), 2:875–81. Austin, USA: IEEE, 2005.
LibreCat
 
[11]
2005 | Journal Article | LibreCat-ID: 30311
Ide, Peter, Frank Schafmeister, Norbert Fröhleke, and Horst Grotstollen. “Enhanced Control Scheme for Three-Phase, Three-Level Rectifiers at Partial Load.” IEEE Transactions on Industrial Electronics 52, no. 3 (2005): 719–26.
LibreCat
 
[10]
2004 | Conference Paper | LibreCat-ID: 30309
Schafmeister, Frank, and Johann Kolar. “Novel Modulation Schemes for Conventional and Sparse Matrix Converters Facilitating Reactive Power Transfer Independent of Active Power Flow.” In Proc. 35th IEEE Power Electronics Specialists Conference (PESC), 4:2917–23. Aachen, Germany: IEEE, 2004.
LibreCat
 
[9]
2004 | Conference Paper | LibreCat-ID: 30308
Ide, Peter , Frank Schafmeister, Norbert Fröhleke, and Horst Grotstollen. “Enhanced Control Scheme for Three-Phase / Three-Level Rectifiers at Partial Load.” In Proc. 35th IEEE Power Electronics Specialists Conference (PESC), 1:207–13. Aachen, Germany: IEEE, 2004.
LibreCat
 
[8]
2004 | Conference Paper | LibreCat-ID: 30310
Schafmeister, Frank, and Johann Kolar. “Novel Hybrid Modulation Schemes Extending the Reactive Power Control Range of Conventional and Sparse Matrix Converters Operating at Maximum Output Voltage.” In Proc. 11th International Power Electronics and Motion Control Conference (EPE-PEMC). Riga, Latvia: EPE, 2004.
LibreCat
 
[7]
2003 | Conference Paper | LibreCat-ID: 30307
Schafmeister, Frank, and Johann Kolar. “Novel Modulation Schemes Minimizing the Switching Losses of Sparse Matrix Converters.” In Proc. IEEE Annual Industrial Electronics Society Conference (IECON), 2085–90. Roanoke, VA, USA: IEEE, 2003.
LibreCat
 
[6]
2003 | Conference Paper | LibreCat-ID: 30300
Schafmeister, Frank, Simon Herold, and Johann Kolar. “Evaluation of 1200V-Si-IGBTs and 1300V-SiC-JFETs for Application in Three-Phase Very Sparse Matrix AC-AC Converter Systems.” In Proc. 18th IEEE Applied Power Electronics Conf. (APEC), 1:241–55. Miami Beach, USA: IEEE, 2003.
LibreCat
 
[5]
2003 | Journal Article | LibreCat-ID: 30306
Schafmeister, Frank, Martina Baumann, and Johann Kolar. “Analytically Closed Calculation of the Conduction Losses of Three-Phase AC-AC Sparse Matrix Converters.” EPE Journal 13, no. 1 (2003): 5–14.
LibreCat
 
[4]
2002 | Conference Paper | LibreCat-ID: 30302
Schafmeister, Frank, Martina Baumann, and Johann Kolar. “Analytically Closed Calculation of the Conduction and Switching Losses of Three-Phase AC-AC Sparse Matrix Converters.” In Proc. 10th International Power Electronics and Motion Control Conference (EPE-PEMC). Cavtat & Dubrovnik, Croatia: EPE, 2002.
LibreCat
 
[3]
2002 | Conference Paper | LibreCat-ID: 30299
Kolar, Johann, Martina Baumann, Frank Schafmeister, and Hans Ertl. “Novel Three-Phase AC-DC-AC Sparse Matrix Converter.” In Proc. 17th IEEE Applied Power Electronics Conf. (APEC), 2:777–91. Dallas, USA: IEEE, 2002.
LibreCat
 
[2]
2002 | Conference Paper | LibreCat-ID: 30305
Schafmeister, Frank, and Johann Kolar. “Analyse der Regelung einer permanenterregten Synchronmaschine bei Speisung durch einen dreiphasigen Sparse-Matrix-Konverter.” In Proc. Ansoft Inspiring Design Workshop. Stuttgart, Germany, 2002.
LibreCat
 
[1]
2001 | Conference Paper | LibreCat-ID: 30124
Ide, Peter, Frank Schafmeister, and Norbert Fröhleke. “Active Common-Mode Voltage Cancellation for Three-Phase PWM Rectifier/Inverter Systems Based on a New Topology.” In Proc. 16th IEEE Applied Power Electronics Conf. (APEC), 1:201–7. Anaheim, USA: IEEE, 2001.
LibreCat
 
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