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311 Publications
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 | Preprint | LibreCat-ID: 29655
W. Kirchgässner, O. Wallscheid, and J. Böcker, “Thermal Neural Networks: Lumped-Parameter Thermal Modeling With State-Space Machine Learning,” arXiv preprint arXiv:2103.16323. 2021.
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2021 | Conference Paper | LibreCat-ID: 29893
P. Rehlaender, R. Unruh, F. Schafmeister, and J. Böcker, “Alternating Asymmetrical Phase-Shift Modulation for Full-Bridge Converters with Balanced Switching Losses to Reduce Thermal Imbalances,” presented at the 2021 IEEE Applied Power Electronics Conference and Exposition (APEC), Phoenix, AZ, USA, 2021, doi: 10.1109/apec42165.2021.9487104.
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2021 | Conference Paper | LibreCat-ID: 22218
S. Krauter et al., “Projekt Art-D Grids: Nachhaltige und stabile Microgrids in Afrika - eine Plattform für Forschung und Lehre für die Entwicklung,” in Tagungsband des 36. PV-Symposiums, 18.-26 Mai 2021, Staffelstein / online, 2021, pp. 305–309.
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2020 | Conference Paper | LibreCat-ID: 29884
J. Böcker, “Analysis of the Magnetic Skin Effekt in Motors and Inductors,” presented at the SPEEDAM, 2020, doi: 10.1109/speedam48782.2020.9161895.
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2020 | Journal Article | LibreCat-ID: 21250
W. Kirchgässner, O. Wallscheid, and J. Böcker, “Estimating Electric Motor Temperatures with Deep Residual Machine Learning,” IEEE Transactions on Power Electronics, vol. 36, no. 7, pp. 7480–7488, 2020, doi: 10.1109/tpel.2020.3045596.
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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 | Journal Article | LibreCat-ID: 21558
A. Brosch, S. Hanke, O. Wallscheid, and J. Böcker, “Data-Driven Recursive Least Squares Estimation for Model Predictive Current Control of Permanent Magnet Synchronous Motors,” IEEE Transactions on Power Electronics, pp. 2179–2190, 2020, doi: 10.1109/tpel.2020.3006779.
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2020 | Conference Paper | LibreCat-ID: 29956
K. S. C. Stille, D. Weber, J. Lange, T. Vogt, O. Wallscheid, and J. Böcker, “Emulation of Microgrids for Research and Validation of Control and Operation Strategies,” presented at the SPEEDAM, Sorrent, Italy, 2020, doi: 10.1109/speedam48782.2020.9161971.
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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 | Journal Article | LibreCat-ID: 30033
M. Stender, O. Wallscheid, and J. Böcker, “Comparison of Gray-Box and Black-Box Two-Level Three-Phase Inverter Models for Electrical Drives,” IEEE Transactions on Industrial Electronics, vol. 68, no. 9, pp. 8646–8656, 2020, doi: 10.1109/tie.2020.3018060.
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2020 | Conference Paper | LibreCat-ID: 30036
M. Stender, O. Wallscheid, and J. Böcker, “Accurate Torque Estimation for Induction Motors by Utilizing Globally Optimized Flux Observers,” 2020, doi: 10.1109/speedam48782.2020.9161955.
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2020 | Conference Paper | LibreCat-ID: 29641
E. G. Gedlu, O. Wallscheid, and J. Böcker, “Permanent magnet synchronous machine temperature estimation using low-order lumped-parameter thermal network with extended iron loss model,” in The 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020), 2020, vol. 2020, pp. 937–942.
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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 | Journal Article | LibreCat-ID: 29642
S. Hanke, O. Wallscheid, and J. Böcker, “Data Set Description: Identifying the Physics Behind an Electric Motor–Data-Driven Learning of the Electrical Behavior (Part II),” arXiv preprint arXiv:2003.06268, 2020.
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2020 | Journal Article | LibreCat-ID: 29640
W. Kirchgässner, O. Wallscheid, and J. Böcker, “Data-Driven Permanent Magnet Temperature Estimation in Synchronous Motors with Supervised Machine Learning,” arXiv preprint arXiv:2001.06246, 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: 29885
M. T. Joy and J. Böcker, “Speed Estimation in Induction Machines at all Speed Ranges Using Sensing Windings,” presented at the IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Chennai, India, 2019, doi: 10.1109/pedes.2018.8707494.
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2019 | Conference Paper | LibreCat-ID: 21247
W. Kirchgässner, O. Wallscheid, and J. Böcker, “Empirical Evaluation of Exponentially Weighted Moving Averages for Simple Linear Thermal Modeling of Permanent Magnet Synchronous Machines,” 2019, doi: 10.1109/isie.2019.8781195.
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2019 | Conference Paper | LibreCat-ID: 21249
W. Kirchgässner, O. Wallscheid, and J. Böcker, “Deep Residual Convolutional and Recurrent Neural Networks for Temperature Estimation in Permanent Magnet Synchronous Motors,” 2019, doi: 10.1109/iemdc.2019.8785109.
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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: 30035
M. Stender, O. Wallscheid, and J. Böcker, “Development of a Black-Box Two-Level IGBT Three-Phase Inverter Compensation Scheme for Electrical Drives,” 2019, doi: 10.1109/isie.2019.8781543.
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2019 | Conference Paper | LibreCat-ID: 29636
S. Hanke, S. Peitz, O. Wallscheid, J. Böcker, and M. Dellnitz, “Finite-control-set model predictive control for a permanent magnet synchronous motor application with online least squares system identification,” in 2019 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE), 2019, pp. 1–6.
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2019 | Conference Paper | LibreCat-ID: 29634
O. Wallscheid, M. S. Shafiq, and J. Böcker, “Stator flux-based field-oriented position-sensorless control of permanent magnet synchronous motors with limited parameter knowledge,” in 2019 IEEE 28th International Symposium on Industrial Electronics (ISIE), 2019, pp. 402–407.
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2019 | Conference Paper | LibreCat-ID: 29633
O. Wallscheid, E. F. B. Ngoumtsa, and J. Böcker, “Hierarchical model predictive speed and current control of an induction machine drive with moving-horizon load torque estimator,” in 2019 IEEE International Electric Machines & Drives Conference (IEMDC), 2019, pp. 2188–2195.
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2019 | Conference Paper | LibreCat-ID: 29637
S. Hanke, O. Wallscheid, and J. Böcker, “Continuous-control-set model predictive control with integrated modulator in permanent magnet synchronous motor applications,” in 2019 IEEE International Electric Machines & Drives Conference (IEMDC), 2019, pp. 2210–2216.
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2019 | Journal Article | LibreCat-ID: 29629
D. E. E. Gaona, O. Wallscheid, and J. Böcker, “Improved Fusion of Permanent Magnet Temperature Estimation Techniques for Synchronous Motors Using a Kalman Filter,” IEEE Transactions on Industrial Electronics, 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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2018 | Conference Paper | LibreCat-ID: 29888
O. Buchholz and J. Böcker, “Online-Identification of the Machine Parameters of an Induction Motor Drive,” presented at the International Symposium on Industrial Electronics (ISIE), Cairns, QLD, Australia, 2018, doi: 10.1109/isie.2018.8433852.
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2018 | Conference Paper | LibreCat-ID: 29912
O. Buchholz and J. Böcker, “Gopinath-observer for flux estimation of an induction machine drive system,” presented at the 2017 IEEE Southern Power Electronics Conference (SPEC), Puerto Varas, Chile, 2018, doi: 10.1109/spec.2017.8333614.
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2018 | Conference Paper | LibreCat-ID: 29911
T. Vogt, J. Badeda, J. Böcker, and D. U. Sauer, “Consideration on primary control reserve provision by industrial microgrids in grid-coupled operation,” Honolulu, HI, USA , 2018, doi: 10.1109/peds.2017.8289189.
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2018 | Conference Paper | LibreCat-ID: 29905
M. T. Joy and J. Böcker, “Sensorless Control of Induction Motor Drives Using Additional Windings on the Stator,” presented at the International Symposium on Sensorless Control for Electrical Drives (SLED), Helsinki, Finland , 2018, doi: 10.1109/sled.2018.8486038.
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2018 | Conference Paper | LibreCat-ID: 29908
S. Bolte, N. Fröhleke, and J. Böcker, “GaN Buck Converter in CCM with Optimized High Frequency Inductors,” in PCIM Europe 2018; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, Nuremberg, Germany, 2018, pp. 1–6.
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2018 | Conference Paper | LibreCat-ID: 29943
D. Weber, K. S. C. Stille, O. Wallscheid, and J. Böcker, “Energy Management for a Nano-CHP Unit and an Electrical Storage System in a Residential Application,” 2018, doi: 10.1109/speedam.2018.8445296.
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