Frank Schafmeister
Leistungselektronik und Elektrische Antriebstechnik (LEA)
schafmeister@lea.uni-paderborn.deID
92 Publications
2023 | Conference Paper | LibreCat-ID: 48352
R. Unruh, J. Böcker, and F. Schafmeister, “An Optimized Third-Harmonic Injection Reduces DC-Link Voltage Ripple in Cascaded H-Bridge Converters up to 50% for all Power Factors,” presented at the 2023 25th European Conference on Power Electronics and Applications (EPE’23 ECCE Europe), Aalborg, Denmark, 2023, doi: 10.23919/epe23ecceeurope58414.2023.10264313.
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2022 | Conference Abstract | LibreCat-ID: 30347
F. Schafmeister, “Compensation of LF Common-Mode Noise by the internal DC/DC-Stage for transformerless On-Board Chargers at Three- and Single-Phase Operation,” presented at the International Conference on Electric & Electronic in Hybrid and Electric Vehicles and Electric Energy Management (EEHE 22) , Bamberg, Germany.
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2022 | Conference Paper | LibreCat-ID: 30349
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.
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2022 | Conference Paper | LibreCat-ID: 30350
L. Keuck, F. Schafmeister, and J. Böcker, “Robust Hysteresis Control for LLC Resonant Converters Using a Fully Isolated Measurement Scheme,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 22), Nuremberg, Germany.
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2022 | Conference Paper | LibreCat-ID: 30844
J. Huber, P. Wallmeier, R. Pieper, F. Schafmeister, and J. Kolar, “Comparative Evaluation of MVAC-LVDC SST and Hybrid Transformer Concepts for Future Datacenters,” presented at the 9th IEEJ International Power Electronics Conference (IPEC), Himeji, Japan.
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2022 | Conference Paper | LibreCat-ID: 35125
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: 10.1109/apec43599.2022.9773701.
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2022 | Conference Paper | LibreCat-ID: 35127
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 PCIM Europe 2022; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 2022, pp. 1–10, doi: 10.30420/565822103.
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2022 | Journal Article | LibreCat-ID: 44163
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,” IEEE Transactions on Power Electronics, vol. 37, no. 11, pp. 13413–13427, 2022, doi: 10.1109/tpel.2022.3180758.
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2022 | Conference Paper | LibreCat-ID: 44164
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 2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), Hannover, Germany, 2022, p. P.1-P.11.
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2022 | Conference Paper | LibreCat-ID: 44161
P. Rehlaender, F. Schafmeister, and J. Böcker, “Phase-Shift Modulation for Flying-Capacitor DC-DC Converters,” in 2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), Hannover, Germany, 2022, pp. 1–9.
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2022 | Conference Paper | LibreCat-ID: 34176
R. Unruh, F. Schafmeister, and J. Böcker, “Zero-Sequence Voltage Reduces DC-Link Capacitor Demand in Cascaded H-Bridge Converters for Large-Scale Electrolyzers by 40%,” presented at the 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), Hanover, Germany, 2022.
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2022 | Conference Paper | LibreCat-ID: 35126
N. Förster et al., “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), 2022, p. P.1-P.9.
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2021 | Conference Paper | LibreCat-ID: 29849
B. Strothmann, F. Schafmeister, and J. Böcker, “Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger,” 2021, doi: 10.1109/apec42165.2021.9487462.
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2021 | Journal Article | LibreCat-ID: 29892
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,” IEEE Transactions on Power Electronics, vol. 36, no. 9, pp. 10065–10080, 2021, doi: 10.1109/tpel.2021.3067843.
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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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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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2019 | Conference Paper | LibreCat-ID: 30335
L. Keuck, F. Schafmeister, J. Böcker, H. Jungwirth, and M. Schmidhuber, “Computer-Aided Design and Optimization of an Integrated Transformer with Distributed Air Gap and Leakage Path for LLC Resonant Converter,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 19), Nuremberg, Germany, 2019.
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2019 | Conference Paper | LibreCat-ID: 30337
M. E. Ahmad, F. Schafmeister, and J. Böcker, “Novel Current Measurement Concept for Half Bridge Topologies based on simple-to-implement Digital Current Observer,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 19), Nuremberg, Germany, 2019.
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2019 | Conference Paper | LibreCat-ID: 30336
S. Bolte, F. Schafmeister, and J. Böcker, “LCC Resonant Converter for Piezoelectric Transducers with Phase Shift Control,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 19), Nuremberg, Germany, 2019.
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2019 | Conference Paper | LibreCat-ID: 30338
S. Bolte, F. Schafmeister, and J. Böcker, “Bidirectional Resonant Converter with Integrated Magnetics for On-Board Chargers,” in Proc. IEEE International Symposium on Industrial Electronics (ISIE), Vancouver, Canada, 2019, pp. 770–774.
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2019 | Conference Paper | LibreCat-ID: 30344
P. Rehlaender, T. Grote, F. Schafmeister, and J. Böcker, “Interleaved Active Clamp Forward Converters as Single Stage On-Board DC-DC Converters for EVs – an Accurate Model and Design Considerations,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 19), Nuremberg, Germany, 2019.
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2019 | Conference Paper | LibreCat-ID: 30346
P. Rehlaender et al., “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), Genova, Italy, 2019, pp. 1–9.
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2019 | Conference Paper | LibreCat-ID: 30345
P. Rehlaender, T. Grote, F. Schafmeister, and J. Böcker, “Analytical Topology Comparison for a Single-Stage On-Board EV-Battery Converter,” in Proc. IEEE International Symposium on Industrial Electronics (ISIE), Vancouver, Canada, 2019, pp. 2477–2482.
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2019 | Patent | LibreCat-ID: 30361
R. Pohlmann and F. Schafmeister, “Current measurement circuit for TCM-PFC.” 2019.
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2018 | Conference Paper | LibreCat-ID: 30331
L. Keuck, A. Munir, F. Schafmeister, and J. Böcker, “Adaptive Frequency Control of DC-DC-Converters for Maximum Efficiency Using Artificial Neural Network,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 18), Nuremberg, Germany, 2018.
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2018 | Conference Paper | LibreCat-ID: 30332
L. Keuck, N. Jabbar, F. Schafmeister, and J. 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), Riga, Latvia, 2018, pp. 1–10.
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2018 | Conference Paper | LibreCat-ID: 30333
M. Hagemeyer, F. Schafmeister, and J. Böcker, “Coupled Inductor Design for Interleaved High-Current DC-DC Converters,” in Proc. International Conference on Electrical Machines and Systems (ICEMS), Jeju, South-Korea, 2018, pp. 2316–2321.
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2017 | Patent | LibreCat-ID: 30358
H. Figge, F. Schafmeister, and T. Grote, “LLC Balancing.” 2017.
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2017 | Patent | LibreCat-ID: 30363
P. Wallmeier and F. Schafmeister, “Controller for an Inverter (PV Inverter: PV Self Consumption & symm. Output Control).” 2017.
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2015 | Conference Paper | LibreCat-ID: 30330
F. Schafmeister, T. Grote, and H. Figge, “Today’s Relevance of Digital Control in Server- and Telecom Power Supplies,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 15), Nuremberg, Germany, 2015.
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2015 | Patent | LibreCat-ID: 30359
P. Ide, F. Schafmeister, J. Richter, B. Pour, D. Spesser, and D. Herke, “Adaptable AC Input Phase Switching.” 2015.
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2015 | Patent | LibreCat-ID: 30360
M. Hufnagel and F. Schafmeister, “Resistorless Precharging.” 2015.
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2014 | Conference Paper | LibreCat-ID: 30327
F. Schafmeister, P. Ide, and J. Richter, “Adaptable AC Input Phase Switching for Optimum Utilization of Various Grid Configurations supplying Power Electronic Converters and EV/HEV On Board Chargers,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 14), Nuremberg, Germany, 2014.
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2014 | Conference Paper | LibreCat-ID: 30329
R. Li, H. Njiende, F. Schafmeister, and P. Ide, “A Soft-Switching Interleaved DC-DC Converter with Integrated Magnetics for High Voltage Battery Charger,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 14), Nuremberg, Germany, 2014.
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2014 | Conference Paper | LibreCat-ID: 30328
F. Schafmeister, M. Hufnagel, and P. Ide, “Resistorless Precharging of Boost PFCs by Phase Angle Control of Thyristors,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 14), Nuremberg, Germany, 2014.
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2013 | Conference Paper | LibreCat-ID: 30326
H. Figge, T. Grote, N. Fröhleke, J. Böcker, and F. Schafmeister, “Two-Phase Interleaving Configuration of the LLC Resonant Converter - Analysis and Experimental Evaluation,” in Proc. IEEE Annual Industrial Electronics Society Conference (IECON), Vienna, Austria, 2013, pp. 1392–1397.
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2013 | Patent | LibreCat-ID: 30357
H. Njiende, R. Li, F. Schafmeister, and P. Ide, “Integrated Magnetic for DCM-PSFB Converter.” 2013.
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2013 | Patent | LibreCat-ID: 30356
H. Figge and F. Schafmeister, “Resonant capacitor clamping circuit in resonant converter.” 2013.
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2012 | Conference Paper | LibreCat-ID: 30325
H. Figge, N. Fröhleke, J. Böcker, and F. 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), Nuremberg, Germany, 2012, pp. 1–8.
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2012 | Journal Article | LibreCat-ID: 30324
F. Schafmeister and J. 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, vol. 59, no. 1, pp. 194–210, 2012.
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2012 | Book Chapter | LibreCat-ID: 30343
J. Kolar and F. Schafmeister, “Matrixkonverter, Kapitel 3.8,” in Lehrbuch Leistungselektronische Schaltungen , 3rd ed., D. Schröder, Ed. Berlin Heidelberg: Springer Vieweg Verlag, 2012, pp. 195–296.
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2012 | Patent | LibreCat-ID: 30355
F. Schafmeister and T. Grote, “Digital Slope Compensation for Current Mode Control.” 2012.
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2011 | Conference Paper | LibreCat-ID: 30323
T. Grote, H. Figge, N. Fröhleke, J. Böcker, and F. Schafmeister, “Digital Control Strategy for Multi-Phase Interleaved Boundary Mode and DCM Boost PFC Converters,” in Proc. IEEE Energy Conversion Congress and Exposition (ECCE), Phoenix, AZ, USA, 2011, pp. 3186–3192.
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2011 | Conference Paper | LibreCat-ID: 30322
H. Figge, T. Grote, N. Fröhleke, J. Böcker, and F. Schafmeister, “Overcurrent Protection for the LLC Resonant Converter with Improved Hold-Up Time,” in Proc. 26th IEEE Applied Power Electronics Conference (APEC), Fort Worth, TX, USA, 2011, pp. 13–20.
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2011 | Patent | LibreCat-ID: 30354
F. Schafmeister and J. Kolar, “Unidirektionaler AC-AC-Matrixkonverter mit Dreipunkt Ein- und Ausgangsstufe.” 2011.
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2011 | Patent | LibreCat-ID: 30353
F. Schafmeister and J. Kolar, “Verfahren zum spannungslosen Schalten der Pulswechselrichter-Ausgangsstufe eines indirekten Dreiphasen-AC-AC Matrixkonverters.” 2011.
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2010 | Conference Paper | LibreCat-ID: 30321
F. Schafmeister, X. Wang, T. Grote, and P. 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), Bari, Italy, 2010, pp. 3831–3835.
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2009 | Conference Paper | LibreCat-ID: 30319
T. Grote et al., “Semi-Digital Interleaved PFC Control with Optimized Light Load Efficiency,” in Proc. 24th IEEE Applied Power Electronics Conference (APEC), Washington D.C., USA, 2009, pp. 1722–1727.
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2009 | Conference Paper | LibreCat-ID: 30320
T. Grote, F. Schafmeister, H. Figge, N. Fröhleke, P. Ide, and J. Böcker, “Adaptive Digital Slope Compensation for Peak Current Mode Control,” in Proc. IEEE Energy Conversion Congress and Exposition (ECCE), San Jose, CA, USA, 2009, pp. 3523–3529.
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2009 | Patent | LibreCat-ID: 30351
F. Schafmeister and J. Kolar, “Verfahren zur Nutzung des ausgangsseitigen Blindstromes eines indirekten dreiphasen-Matrixkonverters zur Erzeugung von Eingangsblindstrom.” 2009.
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2009 | Conference Paper | LibreCat-ID: 30517
T. Grote, F. Schafmeister, H. Figge, N. Fröhleke, P. Ide, and J. Böcker, “Adaptive digital slope compensation for peak current mode control,” 2009, doi: 10.1109/ecce.2009.5316380.
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2008 | Conference Paper | LibreCat-ID: 30318
H. Figge, N. Fröhleke, F. Schafmeister, and P. Ide, “Paralleling of LLC Resonant Converters using Frequency Controlled Current Balancing,” presented at the DPEC Seminar 2008, Shanghai, China, 2008.
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2008 | Conference Paper | LibreCat-ID: 30317
T. Grote, N. Fröhleke, F. Schafmeister, and P. Ide, “Semi-Digital Interleaved PFC Control,” presented at the DPEC Seminar, Shanghai, China, 2008.
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2008 | Book Chapter | LibreCat-ID: 30316
J. Kolar and F. Schafmeister, “Matrixkonverter, Kapitel 3.8,” in Lehrbuch Leistungselektronische Schaltungen, 2nd ed., D. Schröder, Ed. Berlin Heidelberg: Springer-Verlag, 2008, pp. 188–289.
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2007 | Patent | LibreCat-ID: 30352
J. Kolar and F. Schafmeister, “Verfahren zur Minimierung der Schaltverluste eines quasi-direkten Dreiphasen-AC/AC-Pulsumrichters bei geringer Amplitude der Ausgangsspannungsgrundschwingung.” 2007.
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2007 | Journal Article | LibreCat-ID: 30314
J. Kolar, F. Schafmeister, S. Round, and H. Ertl, “Novel Three-Phase AC–AC Sparse Matrix Converters,” IEEE Transactions on Power Electronics, vol. 22, no. 5, pp. 1649–1661, 2007.
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2007 | Dissertation | LibreCat-ID: 30315
F. Schafmeister, Indirekte Sparse Matrix Konverter. Zürich, Switzerland: ETH Zürich, 2007.
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2006 | Journal Article | LibreCat-ID: 30313
S. Round, F. Schafmeister, and J. 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, vol. 126-D, no. 5, pp. 578–588, 2006.
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2005 | Conference Paper | LibreCat-ID: 30312
S. Round, F. Schafmeister, E. Pereira, L. Serpa, and J. Kolar, “Comparison of Performance and Realization Effort of a Very Sparse Matrix Converter to a Voltage DC Link PWM Inverter with Active Front End,” presented at the 5th IEEJ International Power Electronics Conference (IPEC), Niigata, Japan, 2005.
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2005 | Conference Paper | LibreCat-ID: 30301
F. Schafmeister, C. Rytz, and J. 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), Austin, USA, 2005, vol. 2, pp. 875–881.
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2005 | Journal Article | LibreCat-ID: 30311
P. Ide, F. Schafmeister, N. Fröhleke, and H. Grotstollen, “Enhanced Control Scheme for Three-Phase, Three-Level Rectifiers at Partial Load,” IEEE Transactions on Industrial Electronics, vol. 52, no. 3, pp. 719–726, 2005.
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2004 | Conference Paper | LibreCat-ID: 30309
F. Schafmeister and J. 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), Aachen, Germany, 2004, vol. 4, pp. 2917–2923.
LibreCat
2004 | Conference Paper | LibreCat-ID: 30308
P. Ide, F. Schafmeister, N. Fröhleke, and H. Grotstollen, “Enhanced Control Scheme for Three-Phase / Three-Level Rectifiers at Partial Load,” in Proc. 35th IEEE Power Electronics Specialists Conference (PESC), Aachen, Germany, 2004, vol. 1, pp. 207–213.
LibreCat
2004 | Conference Paper | LibreCat-ID: 30310
F. Schafmeister and J. Kolar, “Novel Hybrid Modulation Schemes Extending the Reactive Power Control Range of Conventional and Sparse Matrix Converters Operating at Maximum Output Voltage,” presented at the International Power Electronics and Motion Control Conference (EPE-PEMC), Riga, Latvia, 2004.
LibreCat
2003 | Conference Paper | LibreCat-ID: 30307
F. Schafmeister and J. Kolar, “Novel Modulation Schemes Minimizing the Switching Losses of Sparse Matrix Converters,” in Proc. IEEE Annual Industrial Electronics Society Conference (IECON), Roanoke, VA, USA, 2003, pp. 2085–2090.
LibreCat
2003 | Conference Paper | LibreCat-ID: 30300
F. Schafmeister, S. Herold, and J. 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), Miami Beach, USA, 2003, vol. 1, pp. 241–255.
LibreCat
2003 | Journal Article | LibreCat-ID: 30306
F. Schafmeister, M. Baumann, and J. Kolar, “Analytically Closed Calculation of the Conduction Losses of Three-Phase AC-AC Sparse Matrix Converters,” EPE Journal, vol. 13, no. 1, pp. 5–14, 2003.
LibreCat
2002 | Conference Paper | LibreCat-ID: 30302
F. Schafmeister, M. Baumann, and J. Kolar, “Analytically Closed Calculation of the Conduction and Switching Losses of Three-Phase AC-AC Sparse Matrix Converters,” presented at the 10th International Power Electronics and Motion Control Conference (EPE-PEMC), Cavtat & Dubrovnik, Croatia, 2002.
LibreCat
2002 | Conference Paper | LibreCat-ID: 30299
J. Kolar, M. Baumann, F. Schafmeister, and H. Ertl, “Novel Three-Phase AC-DC-AC Sparse Matrix Converter,” in Proc. 17th IEEE Applied Power Electronics Conf. (APEC), Dallas, 2002, vol. 2, pp. 777–791.
LibreCat
2002 | Conference Paper | LibreCat-ID: 30305
F. Schafmeister and J. Kolar, “Analyse der Regelung einer permanenterregten Synchronmaschine bei Speisung durch einen dreiphasigen Sparse-Matrix-Konverter,” presented at the Ansoft Inspiring Design Workshop, Stuttgart, Germany, 2002.
LibreCat
2001 | Conference Paper | LibreCat-ID: 30124
P. Ide, F. Schafmeister, and N. 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), Anaheim, USA, 2001, vol. 1, pp. 201–207.
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92 Publications
2023 | Conference Paper | LibreCat-ID: 48352
R. Unruh, J. Böcker, and F. Schafmeister, “An Optimized Third-Harmonic Injection Reduces DC-Link Voltage Ripple in Cascaded H-Bridge Converters up to 50% for all Power Factors,” presented at the 2023 25th European Conference on Power Electronics and Applications (EPE’23 ECCE Europe), Aalborg, Denmark, 2023, doi: 10.23919/epe23ecceeurope58414.2023.10264313.
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2022 | Conference Abstract | LibreCat-ID: 30347
F. Schafmeister, “Compensation of LF Common-Mode Noise by the internal DC/DC-Stage for transformerless On-Board Chargers at Three- and Single-Phase Operation,” presented at the International Conference on Electric & Electronic in Hybrid and Electric Vehicles and Electric Energy Management (EEHE 22) , Bamberg, Germany.
LibreCat
2022 | Conference Paper | LibreCat-ID: 30349
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.
LibreCat
2022 | Conference Paper | LibreCat-ID: 30350
L. Keuck, F. Schafmeister, and J. Böcker, “Robust Hysteresis Control for LLC Resonant Converters Using a Fully Isolated Measurement Scheme,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 22), Nuremberg, Germany.
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2022 | Conference Paper | LibreCat-ID: 30844
J. Huber, P. Wallmeier, R. Pieper, F. Schafmeister, and J. Kolar, “Comparative Evaluation of MVAC-LVDC SST and Hybrid Transformer Concepts for Future Datacenters,” presented at the 9th IEEJ International Power Electronics Conference (IPEC), Himeji, Japan.
LibreCat
2022 | Conference Paper | LibreCat-ID: 35125
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: 10.1109/apec43599.2022.9773701.
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| DOI
2022 | Conference Paper | LibreCat-ID: 35127
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 PCIM Europe 2022; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, 2022, pp. 1–10, doi: 10.30420/565822103.
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| DOI
2022 | Journal Article | LibreCat-ID: 44163
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,” IEEE Transactions on Power Electronics, vol. 37, no. 11, pp. 13413–13427, 2022, doi: 10.1109/tpel.2022.3180758.
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| DOI
2022 | Conference Paper | LibreCat-ID: 44164
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 2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), Hannover, Germany, 2022, p. P.1-P.11.
LibreCat
2022 | Conference Paper | LibreCat-ID: 44161
P. Rehlaender, F. Schafmeister, and J. Böcker, “Phase-Shift Modulation for Flying-Capacitor DC-DC Converters,” in 2022 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), Hannover, Germany, 2022, pp. 1–9.
LibreCat
2022 | Conference Paper | LibreCat-ID: 34176
R. Unruh, F. Schafmeister, and J. Böcker, “Zero-Sequence Voltage Reduces DC-Link Capacitor Demand in Cascaded H-Bridge Converters for Large-Scale Electrolyzers by 40%,” presented at the 24th European Conference on Power Electronics and Applications (EPE’22 ECCE Europe), Hanover, Germany, 2022.
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2022 | Conference Paper | LibreCat-ID: 35126
N. Förster et al., “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), 2022, p. P.1-P.9.
LibreCat
2021 | Conference Paper | LibreCat-ID: 29849
B. Strothmann, F. Schafmeister, and J. Böcker, “Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger,” 2021, doi: 10.1109/apec42165.2021.9487462.
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| DOI
2021 | Journal Article | LibreCat-ID: 29892
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,” IEEE Transactions on Power Electronics, vol. 36, no. 9, pp. 10065–10080, 2021, doi: 10.1109/tpel.2021.3067843.
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| DOI
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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| DOI
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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| Download (ext.)
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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| Download (ext.)
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.
LibreCat
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.
LibreCat
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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| DOI
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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| Download (ext.)
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.
LibreCat
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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| Download (ext.)
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.
LibreCat
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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| DOI
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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2019 | Conference Paper | LibreCat-ID: 30335
L. Keuck, F. Schafmeister, J. Böcker, H. Jungwirth, and M. Schmidhuber, “Computer-Aided Design and Optimization of an Integrated Transformer with Distributed Air Gap and Leakage Path for LLC Resonant Converter,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 19), Nuremberg, Germany, 2019.
LibreCat
2019 | Conference Paper | LibreCat-ID: 30337
M. E. Ahmad, F. Schafmeister, and J. Böcker, “Novel Current Measurement Concept for Half Bridge Topologies based on simple-to-implement Digital Current Observer,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 19), Nuremberg, Germany, 2019.
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2019 | Conference Paper | LibreCat-ID: 30336
S. Bolte, F. Schafmeister, and J. Böcker, “LCC Resonant Converter for Piezoelectric Transducers with Phase Shift Control,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 19), Nuremberg, Germany, 2019.
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2019 | Conference Paper | LibreCat-ID: 30338
S. Bolte, F. Schafmeister, and J. Böcker, “Bidirectional Resonant Converter with Integrated Magnetics for On-Board Chargers,” in Proc. IEEE International Symposium on Industrial Electronics (ISIE), Vancouver, Canada, 2019, pp. 770–774.
LibreCat
2019 | Conference Paper | LibreCat-ID: 30344
P. Rehlaender, T. Grote, F. Schafmeister, and J. Böcker, “Interleaved Active Clamp Forward Converters as Single Stage On-Board DC-DC Converters for EVs – an Accurate Model and Design Considerations,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 19), Nuremberg, Germany, 2019.
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2019 | Conference Paper | LibreCat-ID: 30346
P. Rehlaender et al., “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), Genova, Italy, 2019, pp. 1–9.
LibreCat
2019 | Conference Paper | LibreCat-ID: 30345
P. Rehlaender, T. Grote, F. Schafmeister, and J. Böcker, “Analytical Topology Comparison for a Single-Stage On-Board EV-Battery Converter,” in Proc. IEEE International Symposium on Industrial Electronics (ISIE), Vancouver, Canada, 2019, pp. 2477–2482.
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2019 | Patent | LibreCat-ID: 30361
R. Pohlmann and F. Schafmeister, “Current measurement circuit for TCM-PFC.” 2019.
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2018 | Conference Paper | LibreCat-ID: 30331
L. Keuck, A. Munir, F. Schafmeister, and J. Böcker, “Adaptive Frequency Control of DC-DC-Converters for Maximum Efficiency Using Artificial Neural Network,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 18), Nuremberg, Germany, 2018.
LibreCat
2018 | Conference Paper | LibreCat-ID: 30332
L. Keuck, N. Jabbar, F. Schafmeister, and J. 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), Riga, Latvia, 2018, pp. 1–10.
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2018 | Conference Paper | LibreCat-ID: 30333
M. Hagemeyer, F. Schafmeister, and J. Böcker, “Coupled Inductor Design for Interleaved High-Current DC-DC Converters,” in Proc. International Conference on Electrical Machines and Systems (ICEMS), Jeju, South-Korea, 2018, pp. 2316–2321.
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2017 | Patent | LibreCat-ID: 30358
H. Figge, F. Schafmeister, and T. Grote, “LLC Balancing.” 2017.
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2017 | Patent | LibreCat-ID: 30363
P. Wallmeier and F. Schafmeister, “Controller for an Inverter (PV Inverter: PV Self Consumption & symm. Output Control).” 2017.
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2015 | Conference Paper | LibreCat-ID: 30330
F. Schafmeister, T. Grote, and H. Figge, “Today’s Relevance of Digital Control in Server- and Telecom Power Supplies,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 15), Nuremberg, Germany, 2015.
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2015 | Patent | LibreCat-ID: 30359
P. Ide, F. Schafmeister, J. Richter, B. Pour, D. Spesser, and D. Herke, “Adaptable AC Input Phase Switching.” 2015.
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2015 | Patent | LibreCat-ID: 30360
M. Hufnagel and F. Schafmeister, “Resistorless Precharging.” 2015.
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2014 | Conference Paper | LibreCat-ID: 30327
F. Schafmeister, P. Ide, and J. Richter, “Adaptable AC Input Phase Switching for Optimum Utilization of Various Grid Configurations supplying Power Electronic Converters and EV/HEV On Board Chargers,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 14), Nuremberg, Germany, 2014.
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2014 | Conference Paper | LibreCat-ID: 30329
R. Li, H. Njiende, F. Schafmeister, and P. Ide, “A Soft-Switching Interleaved DC-DC Converter with Integrated Magnetics for High Voltage Battery Charger,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 14), Nuremberg, Germany, 2014.
LibreCat
2014 | Conference Paper | LibreCat-ID: 30328
F. Schafmeister, M. Hufnagel, and P. Ide, “Resistorless Precharging of Boost PFCs by Phase Angle Control of Thyristors,” presented at the IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 14), Nuremberg, Germany, 2014.
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2013 | Conference Paper | LibreCat-ID: 30326
H. Figge, T. Grote, N. Fröhleke, J. Böcker, and F. Schafmeister, “Two-Phase Interleaving Configuration of the LLC Resonant Converter - Analysis and Experimental Evaluation,” in Proc. IEEE Annual Industrial Electronics Society Conference (IECON), Vienna, Austria, 2013, pp. 1392–1397.
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2013 | Patent | LibreCat-ID: 30357
H. Njiende, R. Li, F. Schafmeister, and P. Ide, “Integrated Magnetic for DCM-PSFB Converter.” 2013.
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2013 | Patent | LibreCat-ID: 30356
H. Figge and F. Schafmeister, “Resonant capacitor clamping circuit in resonant converter.” 2013.
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2012 | Conference Paper | LibreCat-ID: 30325
H. Figge, N. Fröhleke, J. Böcker, and F. 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), Nuremberg, Germany, 2012, pp. 1–8.
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2012 | Journal Article | LibreCat-ID: 30324
F. Schafmeister and J. 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, vol. 59, no. 1, pp. 194–210, 2012.
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2012 | Book Chapter | LibreCat-ID: 30343
J. Kolar and F. Schafmeister, “Matrixkonverter, Kapitel 3.8,” in Lehrbuch Leistungselektronische Schaltungen , 3rd ed., D. Schröder, Ed. Berlin Heidelberg: Springer Vieweg Verlag, 2012, pp. 195–296.
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2012 | Patent | LibreCat-ID: 30355
F. Schafmeister and T. Grote, “Digital Slope Compensation for Current Mode Control.” 2012.
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2011 | Conference Paper | LibreCat-ID: 30323
T. Grote, H. Figge, N. Fröhleke, J. Böcker, and F. Schafmeister, “Digital Control Strategy for Multi-Phase Interleaved Boundary Mode and DCM Boost PFC Converters,” in Proc. IEEE Energy Conversion Congress and Exposition (ECCE), Phoenix, AZ, USA, 2011, pp. 3186–3192.
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2011 | Conference Paper | LibreCat-ID: 30322
H. Figge, T. Grote, N. Fröhleke, J. Böcker, and F. Schafmeister, “Overcurrent Protection for the LLC Resonant Converter with Improved Hold-Up Time,” in Proc. 26th IEEE Applied Power Electronics Conference (APEC), Fort Worth, TX, USA, 2011, pp. 13–20.
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2011 | Patent | LibreCat-ID: 30354
F. Schafmeister and J. Kolar, “Unidirektionaler AC-AC-Matrixkonverter mit Dreipunkt Ein- und Ausgangsstufe.” 2011.
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2011 | Patent | LibreCat-ID: 30353
F. Schafmeister and J. Kolar, “Verfahren zum spannungslosen Schalten der Pulswechselrichter-Ausgangsstufe eines indirekten Dreiphasen-AC-AC Matrixkonverters.” 2011.
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2010 | Conference Paper | LibreCat-ID: 30321
F. Schafmeister, X. Wang, T. Grote, and P. 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), Bari, Italy, 2010, pp. 3831–3835.
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2009 | Conference Paper | LibreCat-ID: 30319
T. Grote et al., “Semi-Digital Interleaved PFC Control with Optimized Light Load Efficiency,” in Proc. 24th IEEE Applied Power Electronics Conference (APEC), Washington D.C., USA, 2009, pp. 1722–1727.
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2009 | Conference Paper | LibreCat-ID: 30320
T. Grote, F. Schafmeister, H. Figge, N. Fröhleke, P. Ide, and J. Böcker, “Adaptive Digital Slope Compensation for Peak Current Mode Control,” in Proc. IEEE Energy Conversion Congress and Exposition (ECCE), San Jose, CA, USA, 2009, pp. 3523–3529.
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2009 | Patent | LibreCat-ID: 30351
F. Schafmeister and J. Kolar, “Verfahren zur Nutzung des ausgangsseitigen Blindstromes eines indirekten dreiphasen-Matrixkonverters zur Erzeugung von Eingangsblindstrom.” 2009.
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2009 | Conference Paper | LibreCat-ID: 30517
T. Grote, F. Schafmeister, H. Figge, N. Fröhleke, P. Ide, and J. Böcker, “Adaptive digital slope compensation for peak current mode control,” 2009, doi: 10.1109/ecce.2009.5316380.
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| DOI
2008 | Conference Paper | LibreCat-ID: 30318
H. Figge, N. Fröhleke, F. Schafmeister, and P. Ide, “Paralleling of LLC Resonant Converters using Frequency Controlled Current Balancing,” presented at the DPEC Seminar 2008, Shanghai, China, 2008.
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2008 | Conference Paper | LibreCat-ID: 30317
T. Grote, N. Fröhleke, F. Schafmeister, and P. Ide, “Semi-Digital Interleaved PFC Control,” presented at the DPEC Seminar, Shanghai, China, 2008.
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2008 | Book Chapter | LibreCat-ID: 30316
J. Kolar and F. Schafmeister, “Matrixkonverter, Kapitel 3.8,” in Lehrbuch Leistungselektronische Schaltungen, 2nd ed., D. Schröder, Ed. Berlin Heidelberg: Springer-Verlag, 2008, pp. 188–289.
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2007 | Patent | LibreCat-ID: 30352
J. Kolar and F. Schafmeister, “Verfahren zur Minimierung der Schaltverluste eines quasi-direkten Dreiphasen-AC/AC-Pulsumrichters bei geringer Amplitude der Ausgangsspannungsgrundschwingung.” 2007.
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2007 | Journal Article | LibreCat-ID: 30314
J. Kolar, F. Schafmeister, S. Round, and H. Ertl, “Novel Three-Phase AC–AC Sparse Matrix Converters,” IEEE Transactions on Power Electronics, vol. 22, no. 5, pp. 1649–1661, 2007.
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2007 | Dissertation | LibreCat-ID: 30315
F. Schafmeister, Indirekte Sparse Matrix Konverter. Zürich, Switzerland: ETH Zürich, 2007.
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| Files available
2006 | Journal Article | LibreCat-ID: 30313
S. Round, F. Schafmeister, and J. 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, vol. 126-D, no. 5, pp. 578–588, 2006.
LibreCat
2005 | Conference Paper | LibreCat-ID: 30312
S. Round, F. Schafmeister, E. Pereira, L. Serpa, and J. Kolar, “Comparison of Performance and Realization Effort of a Very Sparse Matrix Converter to a Voltage DC Link PWM Inverter with Active Front End,” presented at the 5th IEEJ International Power Electronics Conference (IPEC), Niigata, Japan, 2005.
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2005 | Conference Paper | LibreCat-ID: 30301
F. Schafmeister, C. Rytz, and J. 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), Austin, USA, 2005, vol. 2, pp. 875–881.
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2005 | Journal Article | LibreCat-ID: 30311
P. Ide, F. Schafmeister, N. Fröhleke, and H. Grotstollen, “Enhanced Control Scheme for Three-Phase, Three-Level Rectifiers at Partial Load,” IEEE Transactions on Industrial Electronics, vol. 52, no. 3, pp. 719–726, 2005.
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2004 | Conference Paper | LibreCat-ID: 30309
F. Schafmeister and J. 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), Aachen, Germany, 2004, vol. 4, pp. 2917–2923.
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2004 | Conference Paper | LibreCat-ID: 30308
P. Ide, F. Schafmeister, N. Fröhleke, and H. Grotstollen, “Enhanced Control Scheme for Three-Phase / Three-Level Rectifiers at Partial Load,” in Proc. 35th IEEE Power Electronics Specialists Conference (PESC), Aachen, Germany, 2004, vol. 1, pp. 207–213.
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2004 | Conference Paper | LibreCat-ID: 30310
F. Schafmeister and J. Kolar, “Novel Hybrid Modulation Schemes Extending the Reactive Power Control Range of Conventional and Sparse Matrix Converters Operating at Maximum Output Voltage,” presented at the International Power Electronics and Motion Control Conference (EPE-PEMC), Riga, Latvia, 2004.
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2003 | Conference Paper | LibreCat-ID: 30307
F. Schafmeister and J. Kolar, “Novel Modulation Schemes Minimizing the Switching Losses of Sparse Matrix Converters,” in Proc. IEEE Annual Industrial Electronics Society Conference (IECON), Roanoke, VA, USA, 2003, pp. 2085–2090.
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2003 | Conference Paper | LibreCat-ID: 30300
F. Schafmeister, S. Herold, and J. 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), Miami Beach, USA, 2003, vol. 1, pp. 241–255.
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2003 | Journal Article | LibreCat-ID: 30306
F. Schafmeister, M. Baumann, and J. Kolar, “Analytically Closed Calculation of the Conduction Losses of Three-Phase AC-AC Sparse Matrix Converters,” EPE Journal, vol. 13, no. 1, pp. 5–14, 2003.
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2002 | Conference Paper | LibreCat-ID: 30302
F. Schafmeister, M. Baumann, and J. Kolar, “Analytically Closed Calculation of the Conduction and Switching Losses of Three-Phase AC-AC Sparse Matrix Converters,” presented at the 10th International Power Electronics and Motion Control Conference (EPE-PEMC), Cavtat & Dubrovnik, Croatia, 2002.
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2002 | Conference Paper | LibreCat-ID: 30299
J. Kolar, M. Baumann, F. Schafmeister, and H. Ertl, “Novel Three-Phase AC-DC-AC Sparse Matrix Converter,” in Proc. 17th IEEE Applied Power Electronics Conf. (APEC), Dallas, 2002, vol. 2, pp. 777–791.
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2002 | Conference Paper | LibreCat-ID: 30305
F. Schafmeister and J. Kolar, “Analyse der Regelung einer permanenterregten Synchronmaschine bei Speisung durch einen dreiphasigen Sparse-Matrix-Konverter,” presented at the Ansoft Inspiring Design Workshop, Stuttgart, Germany, 2002.
LibreCat
2001 | Conference Paper | LibreCat-ID: 30124
P. Ide, F. Schafmeister, and N. 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), Anaheim, USA, 2001, vol. 1, pp. 201–207.
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