@inproceedings{SeligerHabasGornik1995, author = {Seliger, Norbert and Habas, P. and Gornik, E.}, title = {Modeling and measurements of backside laserprobe signals in MOSFETs}, series = {European Conference on Solid-State Device Research (ESSDERC' 95)}, booktitle = {European Conference on Solid-State Device Research (ESSDERC' 95)}, editor = {de Graaf, H. C. and van Kranenburg, H.}, pages = {773 -- 776}, year = {1995}, language = {en} } @inproceedings{SeligerHabasGornik1996, author = {Seliger, Norbert and Habas, P. and Gornik, E.}, title = {Time Domain Characterization of lattice heating in power VDMOSFETs by means of an interferometric laserprobe technique}, series = {Proceedings of the 26th European Solid State Device Research Conference (ESSDERC' 96)}, booktitle = {Proceedings of the 26th European Solid State Device Research Conference (ESSDERC' 96)}, editor = {Baccarani, G. and Rudan, M.}, pages = {847 -- 850}, year = {1996}, language = {en} } @inproceedings{PoganySeligerLalinskyetal.1996, author = {Pogany, D. and Seliger, Norbert and Lalinsky, T. and Kuzmik, J. and Habas, P. and Hrkut, P. and Gornik, E.}, title = {Study of thermal effects in GaAs micromachined power sensor microsystems by an optical interferometer technique}, series = {International Workshop on Thermal Investigation of ICs and Systems (THERMINIC' 96)}, booktitle = {International Workshop on Thermal Investigation of ICs and Systems (THERMINIC' 96)}, pages = {185 -- 190}, year = {1996}, language = {en} } @inproceedings{PoganyLalinskySeligeretal.1996, author = {Pogany, D. and Lalinsky, T. and Seliger, Norbert and Kuzmik, J. and Habas, P. and Hrkut, P. and Gornik, E.}, title = {Power Sensor Microsystems Characterization using a contactless optical laser method}, series = {International Conference on Advanced Semiconductor Devices and Microsystems (ASDAM' 96)}, booktitle = {International Conference on Advanced Semiconductor Devices and Microsystems (ASDAM' 96)}, pages = {201 -- 204}, year = {1996}, language = {en} } @inproceedings{SeligerHabasKoecketal.1996, author = {Seliger, Norbert and Habas, P. and Koeck, A. and Pogany, D. and Gornik, E.}, title = {Backside laserprobing of transient heating in power VDMOSFETs}, series = {International Seminar on Power Semiconductors (ISPS)}, booktitle = {International Seminar on Power Semiconductors (ISPS)}, pages = {115 -- 122}, year = {1996}, language = {en} } @article{SeligerHabašGornik1996, author = {Seliger, Norbert and Habaš, Predrag and Gornik, Erich}, title = {A study of backside laser-probe signals in MOSFETs}, series = {Microelectronic Engineering}, volume = {31}, journal = {Microelectronic Engineering}, number = {1-4}, doi = {10.1016/0167-9317(95)00329-0}, pages = {87 -- 94}, year = {1996}, language = {en} } @inproceedings{PoganyFuerboeckSeligeretal.1997, author = {Pogany, D. and Fuerboeck, C. and Seliger, Norbert and Habas, P. and Gornik, E. and Kubicek, S. and Decoutere, S.}, title = {Optical Testing of submicron-technology MOSFETs and bipolar transistors}, series = {European Solid-State Device Research Conference (ESSDERC' 97)}, booktitle = {European Solid-State Device Research Conference (ESSDERC' 97)}, editor = {Gr{\"u}nbacher, H.}, pages = {372 -- 375}, year = {1997}, language = {en} } @incollection{SeligerFuerboeckHabasetal.1997, author = {Seliger, Norbert and Fuerboeck, C. and Habas, P. and Pogany, D. and Gornik, E.}, title = {Backside-Laserprober Technique for Characterisation of Semiconductor Power Devices}, series = {Proceedings of the Seminar Basics and Technology of Electronic Devices}, booktitle = {Proceedings of the Seminar Basics and Technology of Electronic Devices}, publisher = {Technische Hochschule Rosenheim}, pages = {143 -- 147}, year = {1997}, language = {en} } @inproceedings{SeligerPoganyFuerboecketal.1997, author = {Seliger, Norbert and Pogany, D. and Fuerboeck, C. and Habas, P. and Gornik, E. and Stoisiek, M.}, title = {A study of temperature distribution in SOI-smart power devices in transient conditions by optical interferometry}, series = {27th European Solid-State Device Research Conference (ESSDERC' 97)}, booktitle = {27th European Solid-State Device Research Conference (ESSDERC' 97)}, editor = {Gr{\"u}nbacher, H.}, pages = {372 -- 375}, year = {1997}, language = {en} } @inproceedings{FuerboeckThalhammerSeligeretal.1997, author = {Fuerboeck, C. and Thalhammer, R. and Seliger, Norbert and Pogany, D. and Deboy, G. and Wachutka, G. and Gornik, E.}, title = {Lokale Temperaturbestimmung in Insulated Gate Bipolar Transistoren (IGBTs) mittels Lasersondentechnik}, series = {Beitr{\"a}ge der Informationstagung ME 97 OVE-Schriftenreihe; Nr. 14 (ISBN 3-85133-010-2)}, volume = {14}, booktitle = {Beitr{\"a}ge der Informationstagung ME 97 OVE-Schriftenreihe; Nr. 14 (ISBN 3-85133-010-2)}, pages = {117 -- 122}, year = {1997}, language = {en} } @article{SeligerHabasPoganyetal.1997, author = {Seliger, Norbert and Habas, P. and Pogany, D. and Gornik, E.}, title = {Time-Resolved Analysis of Self-Heating in Power VDMOSFETs Using Backside-Laserprobing}, series = {Solid-State Electronics}, volume = {41}, journal = {Solid-State Electronics}, number = {9}, doi = {10.1016/S0038-1101(97)00131-7}, pages = {1285 -- 1292}, year = {1997}, language = {en} } @article{SeligerPoganyFuerboecketal.1997, author = {Seliger, Norbert and Pogany, D. and Fuerboeck, C. and Habas, P. and Gornik, E.}, title = {A laser beam method for evaluation of thermal time constant in smart power devices}, series = {Microelectronics Reliability}, volume = {37}, journal = {Microelectronics Reliability}, number = {10/11}, doi = {10.1016/S0026-2714(97)00149-2}, pages = {1727 -- 1730}, year = {1997}, language = {en} } @inproceedings{BurianPoganyLalinskyetal.1997, author = {Burian, E. and Pogany, D. and Lalinsky, T. and Seliger, Norbert and Gornik, E.}, title = {Thermal Simulation and characterization of GaAs micromachined power sensor microsystems}, series = {Eurosensors XI}, booktitle = {Eurosensors XI}, pages = {949 -- 952}, year = {1997}, language = {en} } @article{PoganySeligerLalinskyetal.1998, author = {Pogany, D. and Seliger, Norbert and Lalinsky, T. and Kuzmik, J. and Habas, P. and Hrkut, P. and Gornik, E.}, title = {Study of Thermal Effects in GaAs Micromachined Power Sensor Microsystems by an Optical Interferometer Technique}, series = {Microelectronics Journal}, volume = {29}, journal = {Microelectronics Journal}, number = {4-5}, doi = {10.1016/S0026-2692(97)00057-8}, pages = {191 -- 198}, year = {1998}, language = {en} } @article{SeligerGornikPoganyetal.1998, author = {Seliger, Norbert and Gornik, E. and Pogany, D. and Fuerboeck, C. and Habas, P. and Thalhammer, R. and Stoisiek, M.}, title = {Characterisation of Semiconductor Devices by Infrared Laser Interferometry}, series = {E\&I Elektrotechnik und Informationstechnik, Sonderheft Trends in der Mikrotechnik}, journal = {E\&I Elektrotechnik und Informationstechnik, Sonderheft Trends in der Mikrotechnik}, number = {7-8}, doi = {10.1007/BF03159611}, pages = {403 -- 403}, year = {1998}, language = {en} } @article{PoganySeligerGorniketal.1998, author = {Pogany, D. and Seliger, Norbert and Gornik, E. and Stoisiek, M. and Lalinsky, T.}, title = {Analysis of the temperature evolution from the time resolved thermo-optical interferometric measurements with few Fabry-Perot peaks}, series = {Journal of Applied Physics}, volume = {84}, journal = {Journal of Applied Physics}, number = {8}, doi = {10.1063/1.368674}, pages = {4495 -- 4501}, year = {1998}, language = {en} } @article{FuerboeckSeligerPoganyetal.1998, author = {Fuerboeck, C. and Seliger, Norbert and Pogany, D. and Litzenberger, M. and Gornik, E. and Stecher, M. and Gosser, H. and Werner, W.}, title = {Backside laserprober characterization of thermal effects during high current stress in smart power ESD protection devices}, series = {International Electron Devices Meeting (IEDM '98) Technical Digest}, journal = {International Electron Devices Meeting (IEDM '98) Technical Digest}, doi = {10.1109/IEDM.1998.746451}, pages = {691 -- 694}, year = {1998}, language = {en} } @inproceedings{ThalhammerFuerboeckSeligeretal.1998, author = {Thalhammer, R. and Fuerboeck, C. and Seliger, Norbert and Deboy, G. and Gornik, E. and Wachutka, G.}, title = {Internal characterization of IGBTs using the backside laser probing technique - Interpretation of measurement by numerical simulation}, series = {Proceedings of the 10th International Symposium on Power Semiconductor Devices and ICs (Proc. of ISPSD)}, booktitle = {Proceedings of the 10th International Symposium on Power Semiconductor Devices and ICs (Proc. of ISPSD)}, doi = {10.1109/ISPSD.1998.702668}, pages = {199 -- 202}, year = {1998}, language = {en} } @inproceedings{ThalhammerFuerboeckSeligeretal.1998, author = {Thalhammer, R. and Fuerboeck, C. and Seliger, Norbert and Gornik, E. and Wachutka, G.}, title = {Validation and calibration of Electrothermal Device Models Using Infrared Laser Probing Techniques}, series = {Technical Proceedings of the 1998 International Conference on Modeling and Simulation of Microsystems (Proc. of MSM'98)}, booktitle = {Technical Proceedings of the 1998 International Conference on Modeling and Simulation of Microsystems (Proc. of MSM'98)}, pages = {213 -- 217}, year = {1998}, language = {en} } @article{FuerboeckLitzenbergerPoganyetal.1999, author = {F{\"u}rb{\"o}ck, C. and Litzenberger, M. and Pogany, D. and Gornik, E. and Seliger, Norbert and M{\"u}ller-Lynch, T. and Stecher, M. and Goßner, H. and Werner, W.}, title = {Laser interferometric method for ns-time scale thermal mapping of Smart Power ESD protection devices during ESD stress}, series = {Microelectronics Reliability}, volume = {39}, journal = {Microelectronics Reliability}, number = {6}, issn = {0026-2714}, doi = {10.1016/S0026-2714(99)00124-9}, pages = {925 -- 930}, year = {1999}, language = {en} } @article{PoganySeligerLitzenbergeretal.1999, author = {Pogany, D. and Seliger, Norbert and Litzenberger, M. and Gossner, H. and Stecher, M. and M{\"u}ller-Lynch, T. and Werner, W. and Gornik, E.}, title = {Damage analysis in smart-power technology electrostatic discharge (ESD) protection devices}, series = {Microelectronics Reliability}, volume = {39}, journal = {Microelectronics Reliability}, number = {6}, issn = {0026-2714}, doi = {10.1016/S0026-2714(99)00162-6}, pages = {1143 -- 1148}, year = {1999}, language = {en} } @inproceedings{FuerboeckPoganyLitzenbergeretal.1999, author = {F{\"u}rb{\"o}ck, C. and Pogany, D. and Litzenberger, M. and Gornik, E. and Seliger, Norbert and Gossner, H. and M{\"u}ller-Lynch, T. and Stecher, M. and Werner, W.}, title = {Interferometric temperature mapping during ESD stress and failure analysis of smart power technology ESD protection devices}, series = {Electrical Overstress/Electrostatic Discharge Symposium Proceedings}, booktitle = {Electrical Overstress/Electrostatic Discharge Symposium Proceedings}, publisher = {IEEE}, doi = {10.1109/EOSESD.1999.819067}, pages = {241 -- 250}, year = {1999}, language = {en} } @inproceedings{FuerboeckThalhammerLitzenbergeretal.1999, author = {F{\"u}rb{\"o}ck, C. and Thalhammer, R. and Litzenberger, M. and Seliger, Norbert and Pogany, D. and Gornik, E. and Wachutka, G.}, title = {A differential backside laserprobing technique for the investigation of the lateral temperature distribution in power devices}, series = {11th International Symposium on Power Semiconductor Devices and ICs. ISPSD'99 Proceedings}, booktitle = {11th International Symposium on Power Semiconductor Devices and ICs. ISPSD'99 Proceedings}, publisher = {IEEE}, doi = {10.1109/ISPSD.1999.764095}, pages = {193 -- 196}, year = {1999}, language = {en} } @inproceedings{FuerboeckThalhammerLitzenbergeretal.1999, author = {F{\"u}rb{\"o}ck, C. and Thalhammer, R. and Litzenberger, M. and Seliger, Norbert and Pogany, D. and Gornik, E. and Wachutka, G.}, title = {Internal Characterisation of IGBTs Using the Backside Laserprober Technique}, series = {Jahrestagung der GMe, Bad Hofgastein Tagungsband 1999}, booktitle = {Jahrestagung der GMe, Bad Hofgastein Tagungsband 1999}, publisher = {Gesellschaft f{\"u}r Mikroelektronik (GMe)}, isbn = {3-901678-04-8}, year = {1999}, language = {en} } @article{RammingerSeligerWachutka2000, author = {Ramminger, S. and Seliger, Norbert and Wachutka, G.}, title = {Reliability model for Al wire bonds subjected to heel crack failures}, series = {Microelectronics Reliability}, volume = {40}, journal = {Microelectronics Reliability}, number = {8}, issn = {0026-2714}, doi = {10.1016/S0026-2714(00)00139-6}, pages = {1521 -- 1525}, year = {2000}, language = {en} } @article{FuerboeckPoganyLitzenbergeretal.2000, author = {F{\"u}rb{\"o}ck, C. and Pogany, D. and Litzenberger, M. and Gornik, E. and Seliger, Norbert and Gossner, H. and M{\"u}ller-Lynch, T. and Stecher, M. and Werner, W.}, title = {Interferometric temperature mapping during ESD stress and failure analysis of smart power technology ESD protection devices}, series = {Journal of Electrostatics}, volume = {49}, journal = {Journal of Electrostatics}, pages = {195 -- 213}, year = {2000}, language = {en} } @inproceedings{SeligerRammingerFrankeetal.2000, author = {Seliger, Norbert and Ramminger, S. and Franke, T. and Wachutka, G.}, title = {A study of heel crack failures in wire bonds under mechanical cycling}, series = {Proceedings of Micromat 2000}, booktitle = {Proceedings of Micromat 2000}, year = {2000}, language = {en} } @inproceedings{GerberFerreiraHofsajeretal.2001, author = {Gerber, M. and Ferreira, J.A. and Hofsajer, I.W. and Seliger, Norbert}, title = {A volumetric optimization of a low pass filter}, series = {Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248)}, booktitle = {Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248)}, publisher = {IEEE}, doi = {10.1109/IAS.2001.955934}, pages = {2224 -- 2231}, year = {2001}, language = {en} } @inproceedings{GerberFerreiraHofsajeretal.2002, author = {Gerber, M. and Ferreira, J.A. and Hofsajer, I.W. and Seliger, Norbert}, title = {High density packaging of the passive components in an automotive DC/DC converter}, series = {2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289)}, volume = {2}, booktitle = {2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289)}, doi = {10.1109/PSEC.2002.1022545}, pages = {761 -- 767}, year = {2002}, language = {en} } @inproceedings{WolfgangSeligerLugertetal.2002, author = {Wolfgang, E and Seliger, Norbert and Lugert, G and Riepl, T}, title = {High-temperature power electronics: challenges and opportunities}, series = {Proceedings of the 2nd International Conference on Integrated Power Systems (CIPS)}, booktitle = {Proceedings of the 2nd International Conference on Integrated Power Systems (CIPS)}, pages = {43 -- 51}, year = {2002}, language = {en} } @article{GerberFerreiraHofsajeretal.2002, author = {Gerber, M. and Ferreira, J.A. and Hofsajer, I.W. and Seliger, Norbert}, title = {A volumetric optimization of a low-pass filter}, series = {IEEE Transactions on Industry Applications}, volume = {38}, journal = {IEEE Transactions on Industry Applications}, number = {5}, issn = {1939-9367}, doi = {10.1109/TIA.2002.802996}, pages = {1432 -- 1440}, year = {2002}, language = {en} } @article{CastellazziKrausSeligeretal.2002, author = {Castellazzi, A. and Kraus, R. and Seliger, Norbert and Schmitt-Landsiedel, D.}, title = {Reliability analysis of power MOSFET's with the help of compact models and circuit simulation}, series = {Microelectronics Reliability}, volume = {42}, journal = {Microelectronics Reliability}, number = {9}, issn = {0026-2714}, doi = {10.1016/S0026-2714(02)00198-1}, pages = {1605 -- 1610}, year = {2002}, language = {en} } @article{SeligerWolfgangLefrancetal.2002, author = {Seliger, Norbert and Wolfgang, E. and Lefranc, G. and Berg, H. and Licht, T.}, title = {Reliable power electronics for automotive applications}, series = {Microelectronics Reliability}, volume = {42}, journal = {Microelectronics Reliability}, number = {9-11}, issn = {0026-2714}, doi = {10.1016/S0026-2714(02)00197-X}, pages = {1597 -- 1604}, year = {2002}, language = {en} } @inproceedings{GerstenmaierWachutkaSeliger2002, author = {Gerstenmaier, Y.C. and Wachutka, G. and Seliger, Norbert}, title = {Efficient calculation of transient temperature fields responding to fast changing heatsources over long duration in high frequency DC/DC converter}, series = {Proceedings of THERMINIC}, booktitle = {Proceedings of THERMINIC}, pages = {297 -- 302}, year = {2002}, language = {en} } @inproceedings{GerberFerreiraHofsajeretal.2002, author = {Gerber, M. and Ferreira, J.A. and Hofsajer, I.W. and Seliger, Norbert}, title = {A very high density, heatsink mounted inductor for automotive applications}, series = {Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)}, booktitle = {Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)}, publisher = {IEEE}, doi = {10.1109/IAS.2002.1042672}, pages = {948 -- 954}, year = {2002}, language = {en} } @inproceedings{WolfgangLefrancSeligeretal.2002, author = {Wolfgang, E. and Lefranc, G. and Seliger, Norbert and Berg, H. and Licht, T.}, title = {Zuverl{\"a}ssige Leistungselektronik f{\"u}r die Automobiltechnik}, series = {ETG-Tagung Bauelemente der Leistungselektronik und ihre Anwendungen}, booktitle = {ETG-Tagung Bauelemente der Leistungselektronik und ihre Anwendungen}, publisher = {ETG}, address = {Bad Nauheim}, year = {2002}, language = {de} } @inproceedings{GerberFerreiraHofsajeretal.2002, author = {Gerber, M. and Ferreira, J.A. and Hofsajer, I.W. and Seliger, Norbert}, title = {A high power density DC/DC converter for automotive applications}, series = {SAUPEC 2002 Proceedings of the Eleventh Southern African Universities Power Engineering Conference}, booktitle = {SAUPEC 2002 Proceedings of the Eleventh Southern African Universities Power Engineering Conference}, publisher = {IEEE}, pages = {6}, year = {2002}, language = {en} } @inproceedings{RoehrichHirschSeliger2002, author = {R{\"o}hrich, A. and Hirsch, H. and Seliger, Norbert}, title = {Built-in EMC in der Aufbau- und Verbindungstechnik am Beispiel des integrierten Startergenerators}, series = {Proceedings Electronic \& Communications in Traffic Systems (ECT'02)}, booktitle = {Proceedings Electronic \& Communications in Traffic Systems (ECT'02)}, year = {2002}, language = {de} } @inproceedings{RoehrichHirschSeliger2002, author = {R{\"o}hrich, A. and Hirsch, H. and Seliger, Norbert}, title = {EMC modeling of a compact packaging technology of a crankshaft starter generator}, series = {International Conference of Electromagnetic Compatibility (ICEMC 2002)}, booktitle = {International Conference of Electromagnetic Compatibility (ICEMC 2002)}, year = {2002}, language = {en} } @inproceedings{SeligerRacklesSchwarzbaueretal.2002, author = {Seliger, Norbert and Rackles, J. and Schwarzbauer, H. and Wolfgang, E. and Bolz, S.}, title = {Kompakte und hochzuverlaessige Aufbau- und Verbindungstechnik fuer leistungselektronische Systeme am Beispiel Starter Generator}, series = {Proceedings ECT 2002: Electronics and communications in traffic systems.}, booktitle = {Proceedings ECT 2002: Electronics and communications in traffic systems.}, editor = {Peier, D. and Hirsch, H.}, publisher = {MESAGO Messe- und Kongress-GmbH}, address = {Stuttgart (Germany)}, isbn = {3-7785-2885-8}, pages = {120 -- 128}, year = {2002}, abstract = {A compact and high-reliable converter design for an Integrated Starter Generator is presented. The concept is based on integration of the power switches with both the cooling system and the DC link capacitor, which optimizes the thermal management and minimizes inductive and conductive losses. The materials and joining technologies are selected in such a way that the converter can be operated up to 125 C ambient temperature. Therefore, the water cooling system of the combustion engine can directly be used. The paper further reports on circuit simulation results verifying the converter design and on first electrical measurements obtained on a functional prototype operating under normal load conditions (6kW rated power).}, language = {de} } @inproceedings{SeligerRacklesSchwarzbaueretal.2002, author = {Seliger, Norbert and Rackles, J. and Schwarzbauer, H. and Kiffe, W. and Bolz, S.}, title = {Compact and robust power electronics packaging and interconnection technology for an Integrated Starter Generator}, series = {Optimization of the Power Train in Vehicles by Using the Integrated Starter Generator (ISG)}, booktitle = {Optimization of the Power Train in Vehicles by Using the Integrated Starter Generator (ISG)}, publisher = {expert verlag GmbH}, isbn = {9783816920779}, pages = {248 -- 255}, year = {2002}, language = {en} } @article{CastellazziKartalKrausetal.2003, author = {Castellazzi, A. and Kartal, V. and Kraus, R. and Seliger, Norbert and Honsberg-Riedl, M. and Schmitt-Landsiedel, D.}, title = {Hot-Spot Meaurements and Analysis of Electro-Thermal Effects in Low-Voltage Power-MOSFET's}, series = {Microelectronics Reliability}, volume = {43}, journal = {Microelectronics Reliability}, number = {9}, issn = {0026-2714}, doi = {10.1016/S0026-2714(03)00319-6}, pages = {1877 -- 1882}, year = {2003}, language = {en} } @article{CoqueryLefrancLichtetal.2003, author = {Coquery, G. and Lefranc, G. and Licht, T. and Lallemand, R. and Seliger, Norbert and Berg, H.}, title = {High temperature reliability on automotive power modules verified by power cycling tests up to 150°C}, series = {Microelectronics Reliability}, volume = {43}, journal = {Microelectronics Reliability}, number = {9}, issn = {0026-2714}, doi = {10.1016/S0026-2714(03)00318-4}, pages = {1871 -- 1876}, year = {2003}, language = {en} } @article{KanertDettmerPlikatetal.2003, author = {Kanert, W. and Dettmer, H. and Plikat, B. and Seliger, Norbert}, title = {Reliability aspects of semiconductor devices in high temperature applications}, series = {Microelectronics Reliability}, volume = {43}, journal = {Microelectronics Reliability}, number = {9}, issn = {0026-2714}, doi = {10.1016/S0026-2714(03)00313-5}, pages = {1839 -- 1846}, year = {2003}, language = {en} } @inproceedings{OilaCiappaSeligeretal.2003, author = {Oila, K. and Ciappa, M. and Seliger, Norbert and Fichtner, W.}, title = {Thermal Modeling, Simulation and Characterization of a High-Temperature Converter for Automotive Applications}, series = {Proc. 10th European Conference on Power Electronics and Applications, EPE}, volume = {10}, booktitle = {Proc. 10th European Conference on Power Electronics and Applications, EPE}, year = {2003}, language = {en} } @inproceedings{CastellazziKrausSeligeretal.2003, author = {Castellazzi, A. and Kraus, R. and Seliger, Norbert and Schmitt-Landsiedel, D.}, title = {Influence of parasitic inductances on the switching behaviour of Power MOSFETs used in automotive applications}, series = {Proc. 10th European Conference on Power Electronics and Applications, EPE}, volume = {10}, booktitle = {Proc. 10th European Conference on Power Electronics and Applications, EPE}, year = {2003}, language = {en} } @inproceedings{OilaCiappaSeligeretal.2003, author = {Oila, Kari and Ciappa, Mauro and Seliger, Norbert and Fichtner, Wolfgang}, title = {Computer assisted thermal design of an integrated starter generator and model assessment under realistic operating conditions}, series = {International Workshop on Thermal Investigation of ICs and Systems (THERMINIC)}, booktitle = {International Workshop on Thermal Investigation of ICs and Systems (THERMINIC)}, isbn = {978-2-84813-020-0}, pages = {107 -- 112}, year = {2003}, language = {en} } @inproceedings{GerberFerreiraHofsajeretal.2003, author = {Gerber, M. and Ferreira, J.A. and Hofsajer, I.W. and Seliger, Norbert}, title = {High temperature, high power density packaging for automotive applications}, series = {IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.}, booktitle = {IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.}, publisher = {IEEE}, doi = {10.1109/PESC.2003.1218329}, pages = {425 -- 430}, year = {2003}, abstract = {The automotive industry is pushing power electronic packaging to higher operating and heatsink temperatures while still requiring very high power densities due to limited space. Currently, the power electronics that is implemented within the engine compartment of the vehicle must operate with heatsink temperatures of approximately 85/spl deg/C and this temperature can be expected to increase to 125/spl deg/C in the near future. The high temperature operation of the power electronic structure is fundamentally limited by the employed materials maximum temperatures. A packaging concept is introduced that describes a structure realisation that enables the materials to operate at high ambient temperatures without exceeding their individual maximum temperatures. This in turn allows the complete power electronic structure to operate at a higher system temperature. In this paper, the packaging concept that can be used to meet these difficult requirements of high temperature and high power-density is introduced, discussed and implemented. Two case studies are considered and implemented to illustrate the packaging concept.}, language = {en} } @inproceedings{RacklesSeliger2003, author = {Rackles, J. and Seliger, Norbert}, title = {Optimization of DC-Link Capacitors in an Integrated Starter Generator Unit}, series = {The New Automotive 42V Power Net}, booktitle = {The New Automotive 42V Power Net}, editor = {Graf, A.}, publisher = {expert verlag}, isbn = {978-3-8169-1992-6}, year = {2003}, language = {en} } @inproceedings{GerberFerreiraHofsajeretal.2004, author = {Gerber, M. and Ferreira, J.A. and Hofsajer, I.W. and Seliger, Norbert}, title = {An improved 3D integrated DC/DC converter for high temperature environments}, series = {IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551)}, booktitle = {IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551)}, publisher = {IEEE}, pages = {2779 -- 2785}, year = {2004}, language = {en} } @inproceedings{GerberFerreiraHofsajeretal.2004, author = {Gerber, M. and Ferreira, J.A. and Hofsajer, I.W. and Seliger, Norbert}, title = {Interleaving optimization in synchronous rectified DC/DC converters}, series = {IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551)}, booktitle = {IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551)}, publisher = {IEEE}, pages = {4655 -- 4661}, year = {2004}, language = {en} } @article{GerberFerreiraHofsajeretal.2004, author = {Gerber, M. and Ferreira, J.A. and Hofsajer, I.W. and Seliger, Norbert}, title = {A high-density heat-sink-mounted inductor for automotive applications}, series = {IEEE Transactions on Industry Applications}, volume = {40}, journal = {IEEE Transactions on Industry Applications}, number = {4}, publisher = {IEEE}, pages = {1031 -- 1038}, year = {2004}, language = {en} } @inproceedings{RoehrichHirschSeliger2004, author = {R{\"o}hrich, A. and Hirsch, H. and Seliger, Norbert}, title = {EMC-optimised design of a converter power stage by reduction of surface currents}, series = {IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551)}, booktitle = {IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551)}, publisher = {IEEE}, pages = {82 -- 85}, year = {2004}, language = {en} } @inproceedings{HirschRoehrichSeliger2004, author = {Hirsch, H. and R{\"o}hrich, A. and Seliger, Norbert}, title = {EMV-optimierter Entwurf durch gezielte Reduktion von Oberfl{\"a}chenstr{\"o}men}, series = {12. Internationale Fachmesse und Kongress f{\"u}r Elektromagnetische Vertr{\"a}glichkeit}, booktitle = {12. Internationale Fachmesse und Kongress f{\"u}r Elektromagnetische Vertr{\"a}glichkeit}, publisher = {VDE-Verlag GmbH}, address = {D{\"u}sseldorf}, isbn = {3-8007-2810-9}, pages = {689 -- 696}, year = {2004}, language = {de} } @article{GerberFerreiraSeligeretal.2005, author = {Gerber, M. and Ferreira, J.A. and Seliger, Norbert and Hofsajer, I.W.}, title = {Integral 3-D thermal, electrical and mechanical design of an automotive DC/DC converter}, series = {IEEE Transactions on Power Electronics}, volume = {20}, journal = {IEEE Transactions on Power Electronics}, number = {3}, publisher = {IEEE}, pages = {566 -- 575}, year = {2005}, language = {en} } @article{GerberFerreiraSeligeretal.2005, author = {Gerber, M. and Ferreira, J.A. and Seliger, Norbert and Hofsajer, I.W.}, title = {High density packaging of the passive components in an automotive DC/DC converter}, series = {IEEE Transactions on Power Electronics}, volume = {20}, journal = {IEEE Transactions on Power Electronics}, number = {2}, publisher = {IEEE}, pages = {268 -- 275}, year = {2005}, language = {en} } @inproceedings{GerberFerreiraHofsajeretal.2005, author = {Gerber, M. and Ferreira, J.A. and Hofsajer, I.W. and Seliger, Norbert}, title = {Integral design of a high power density DC/DC converter for harsh environments}, series = {European Conference on Power Electronics and Applications}, booktitle = {European Conference on Power Electronics and Applications}, publisher = {IEEE}, year = {2005}, language = {en} } @inproceedings{GerberFerreiraSeligeretal.2005, author = {Gerber, M. and Ferreira, J.A. and Seliger, Norbert and Hofsajer, I.W.}, title = {Design and evaluation of an automotive integrated system module}, series = {Conference Record of the 2005 Industry Applications Conference}, booktitle = {Conference Record of the 2005 Industry Applications Conference}, publisher = {IEEE}, pages = {1144 -- 1151}, year = {2005}, language = {en} } @article{GerberSeligerFerreiraetal.2006, author = {Gerber, M. and Seliger, Norbert and Ferreira, J. A. and Hofsajer, I. W.}, title = {Magnetic component miniaturisation for application in power electronic modules}, series = {4th International Conference on Integrated Power Systems}, journal = {4th International Conference on Integrated Power Systems}, pages = {1 -- 6}, year = {2006}, language = {en} } @inproceedings{RenkenEhbauerKarreretal.2007, author = {Renken, F. and Ehbauer, G. and Karrer, V. and Knorr, R. and Ramminger, S. and Seliger, Norbert and Wolfgang, E.}, title = {Reliability of high temperature inverters for HEV}, series = {Proceedings Power Conversion Conference}, booktitle = {Proceedings Power Conversion Conference}, publisher = {IEEE}, address = {Nagoya}, doi = {10.1109/PCCON.2007.373022}, pages = {563 -- 568}, year = {2007}, language = {en} } @inproceedings{WeidnerKasparSeliger2011, author = {Weidner, Karl and Kaspar, Michael and Seliger, Norbert}, title = {Innovative Leistungsmodule}, series = {Produktion von Leiterplatten und Systemen (PLUS)}, booktitle = {Produktion von Leiterplatten und Systemen (PLUS)}, pages = {1408 -- 1412}, year = {2011}, language = {de} } @inproceedings{WeidnerKasparSeliger2012, author = {Weidner, Karl and Kaspar, Michael and Seliger, Norbert}, title = {Planar Interconnect Technology for Power Module System Integration}, series = {7th International Conference on Integrated Power Electronics Systems (CIPS)}, booktitle = {7th International Conference on Integrated Power Electronics Systems (CIPS)}, publisher = {VDE-VERLAG GMBH}, pages = {13.1}, year = {2012}, abstract = {The recent developments in power semiconductor devices and increasing demands on reliability as well as on operation performance require innovative package technologies. Such a novel package technique based on a Planar Interconnect Technology (SiPLIT®) for power modules is introduced in this work. This package features thick Cu interconnects on a high-reliable insulating film for power semiconductor chip top contacts. Due to the conductor structure and contact technology, on-resistance and stray inductances are very low compared to state-of-the-art Al wire bonds. In addition, large area contacting improves the power cycling capability and surge current robustness significantly. These remark-able properties have been verified on several prototype modules where the manufacturing process has also been optimised in terms of cost-effectiveness, system integration and maturity for series production.}, language = {en} } @inproceedings{Seliger2012, author = {Seliger, Norbert}, title = {Zuverl{\"a}ssigkeit mechatronischer Systeme: Bewertung der Lebensdauer der Leistungselektronik}, series = {Internationales Forum Mechatronik}, booktitle = {Internationales Forum Mechatronik}, pages = {11}, year = {2012}, language = {de} } @inproceedings{Seliger2014, author = {Seliger, Norbert}, title = {Probabilistic model based analysis of electrolytic capacitor ageing and failures in a single-phase power factor correction circuit}, series = {8th International Conference on Integrated Power Electronics Systems (CIPS)}, booktitle = {8th International Conference on Integrated Power Electronics Systems (CIPS)}, publisher = {VDE-VERLAG GMBH}, pages = {6}, year = {2014}, abstract = {Wear-out failures of electrolytic capacitors in single phase power factor correction circuits are investigated in this study. A probabilistic model based approach for temperature driven capacitor degradation is chosen to analyse the probability of failure of the output capacitor bank. Different design strategies are proposed and evaluated in terms of reliability. Parametric variation of capacitor bank designs provides influential effects on system volume, cost and reliability which is modeled for a sample size of 1000 power supply units.}, language = {en} } @inproceedings{StubenrauchSeligerSchusteketal.2015, author = {Stubenrauch, Franz and Seliger, Norbert and Schustek, Maximilian and Lebedev, Alexey and Schmitt-Landsiedel, Doris}, title = {A 13.56MHz class e power amplifier for inductively coupled DC supply with 95\% power added efficiency (PAE)}, series = {2015 International EURASIP Workshop on RFID Technology (EURFID), Rosenheim}, booktitle = {2015 International EURASIP Workshop on RFID Technology (EURFID), Rosenheim}, pages = {87 -- 93}, year = {2015}, abstract = {Recent development of GaN power transistors with blocking voltages up to 650V enables novel power electronics applications with outstanding performance in high-frequency operation. This paper demonstrates a class E power amplifier with 13.56MHz switching frequency for inductively coupled DC power supplies. Continuous wave output power up to 200W is achieved with 95\% Power Added Efficiency (PAE).}, language = {en} } @inproceedings{StubenrauchSeligerSchmittLandsiedel2016, author = {Stubenrauch, Franz and Seliger, Norbert and Schmitt-Landsiedel, Doris}, title = {A Low Impedance Drive Circuit to Suppress the Spurious Turn-On in High Speed Wide Band-Gap Semiconductor Halfbridges}, series = {PCIM Europe 2016; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, N{\"u}rnberg}, booktitle = {PCIM Europe 2016; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, N{\"u}rnberg}, pages = {8}, year = {2016}, abstract = {A gate drive circuit for gallium nitride (GaN) enhancement mode (e-mode) transistors is presented, which avoids parasitic turn-on of the power devices in the halfbridge configuration. New e-mode GaN devices turn on at very low threshold voltages between 1V and 2V. This makes the transistors highly sensitive to spurious turn-on and thus reduces the required safety margin of the gate drive signals. To avoid this parasitic turn-on, a very low gate loop impedance is required. This prevents the halfbridge against bridge shorts during the switching events and guarantees stable gate drive control with increased switching efficiency. The new gate drive circuit is developed in a SPICE simulation environment and verified in a prototype setup by a double pulse test. The simulation matches very well with the experimental result and demonstrates the suppression of parasitic semiconductor turn-on with the proposed gate drive. Furthermore the dissipated switching energy is reduced, compared to a standard gate drive circuit. High DCDC converter efficiency of 98.67\% at 1kW output power is achieved by using the driving circuit for a buck converter prototype with 200kHz switching frequency.}, language = {en} } @inproceedings{SeligerStubenrauchSchmittLandsiedel2016, author = {Seliger, Norbert and Stubenrauch, Franz and Schmitt-Landsiedel, Doris}, title = {A Parametric Layout Study of Radiated Emission from High-Frequency Half-Bridge Switching Cells}, series = {CIPS 2016 - 9th International Conference on Integrated Power Electronics Systems, N{\"u}rnberg}, booktitle = {CIPS 2016 - 9th International Conference on Integrated Power Electronics Systems, N{\"u}rnberg}, pages = {6}, year = {2016}, abstract = {We present a numerical modeling study of radiated emission from half-bridge switching cells based on the method of moments (MoM). A low loop inductance cell design enables high-speed switching of power semiconductors which is demonstrated on a prototype circuit. The layout is further optimized for low radiated emission by variation of the heat sink placement. This is achieved by the heat sink attached to the phase terminal. The performance of the structure in terms of loop impedance, electric field radiation and sensitivity to cable attachments are numerically studied. Emission peaks arising from loop resonances can be reduced by over 20 dB with damping elements in the switching cell. The improved EMI performance of the proposed structure is attributed to decoupling of the loop current from the heat sink structure.}, language = {en} } @inproceedings{StubenrauchSeligerSchmittLandsiedel2016, author = {Stubenrauch, Franz and Seliger, Norbert and Schmitt-Landsiedel, Doris}, title = {A Simplified SPICE Model for Fast Parametric Optimization of High Voltage Power Electronic Circuits in the Megahertz Range}, series = {CIPS 2016; 9th International Conference on Integrated Power Electronics Systems, N{\"u}rnberg}, booktitle = {CIPS 2016; 9th International Conference on Integrated Power Electronics Systems, N{\"u}rnberg}, pages = {6}, year = {2016}, abstract = {An accurate SPICE model is proposed in this paper to calculate the power losses of high voltage converter systems. This supports power circuit optimization in the very first design stage. The parasitic package inductances and the nonlinear voltage dependent semiconductor capacitances are taken into account. In addition the high frequency behavior of the power inductor is investigated. A detailed loss breakdown is done to analyze the main sources of power loss and their physical reasons. The simulation results of the converter waveforms and of its efficiency match very well to the experimental results. The prototype boost converter shows a top efficiency greater than 98.3 \% at a switching frequency of 1 MHz and an output voltage of 400 V at the maximum output power of 1 kW.}, language = {en} } @inproceedings{StubenrauchWittmannKiermayeretal.2017, author = {Stubenrauch, Franz and Wittmann, Josef and Kiermayer, Alexander and Seliger, Norbert and Hagl, Rainer and Schmitt-Landsiedel, Doris and Kennel, Ralph}, title = {FPGA-based High Dynamic Servo Drive Control with a 200kHz Gallium Nitride Inverter}, series = {2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe), Warsaw, Poland}, booktitle = {2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe), Warsaw, Poland}, year = {2017}, abstract = {Increased productivity in industrial processes can be achieved by dynamic and accurate positioning of servo drives. Therefore, improvement of servo drive dynamics using latest technologies in the key components such as inverter, control system and position measuring device are investigated. Using Gallium Nitride (GaN) or Silicon Carbide (SiC) semiconductors for motor inverters enables energy efficient operation up to pulse width modulation (PWM) frequencies of 500 kHz. This allows motor filters with small component sizes. As a result, high motor efficiency, low torque ripple, high control bandwidth and almost ideal sinusoidal output voltages are achieved. Experiments on a 200 kHz Gallium Nitride inverter with sine wave motor filter show a current control loop bandwidth of 3.2 kHz and almost ideal sinusoidal phase voltages. The achieved bandwidths of the speed and position control loops are 318 Hz and 106 Hz, respectively.}, language = {en} } @inproceedings{StubenrauchSeligerSchmittLandsiedel2017, author = {Stubenrauch, Franz and Seliger, Norbert and Schmitt-Landsiedel, Doris}, title = {Design and Performance of a 200 kHz GaN Motor Inverter with Sine Wave Filter}, series = {PCIM Europe 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, N{\"u}rnberg}, booktitle = {PCIM Europe 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, N{\"u}rnberg}, pages = {9}, year = {2017}, abstract = {Gallium Nitride (GaN) semiconductor devices are promised to be a good alternative to Silicon (Si) semiconductors in future motor inverters for variable frequency drives (VFDs). They combine low on state resistance and low switching losses with a high blocking voltage capability. Compared to actual inverters based on insulated gate bipolar transistors (IGBTs) the pulse width modulation (PWM) frequency for efficient operation can be increased by a factor of 5 to 10, extending the PWM frequency range up to 500 kHz. This allows the use of motor filters with small component size. As a result, high motor efficiency, low torque ripple, high control bandwidth and nearly ideal sinusoidal output voltages are achieved. Therefore this inverters can be used for high speed spindle motors and dynamic servo drives. This paper focus on the design of a hybrid sine wave filter consisting of an analog and a digital part. The filter is optimized to achieve low power loss and high current control bandwidth. A 3-phase GaN motor inverter operating at 200 kHz PWM frequency at 400 V DC-link voltage verifies the system design.}, language = {en} } @inproceedings{SeligerStubenrauchBrendeletal.2017, author = {Seliger, Norbert and Stubenrauch, Franz and Brendel, Christian and Schmitt-Landsiedel, Doris}, title = {Impact of Circuit Carrier Technologies on MHz-switching of GaN Half-Bridge Circuits}, series = {PCIM Europe 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy, N{\"u}rnberg}, booktitle = {PCIM Europe 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy, N{\"u}rnberg}, pages = {1407 -- 1415}, year = {2017}, abstract = {Increasing the switching frequency has been one of the most beneficial advancements in modern power electronics. This trend has been enabled by progress in power semiconductors resulting in increased power densities, efficiencies and control dynamics. The aim of this study is to analyze the influence of three different circuit carrier technologies on switching power loss of 650 V hardswitching GaN devices. Limitations and solutions for half-bridge circuits operating at MHz-switching are investigated by modeling and experiments on a prototype.}, language = {en} } @inproceedings{StoettnerSeliger2018, author = {Stoettner, Julia and Seliger, Norbert}, title = {Ring resonator based signal and power transfer at UHF frequencies}, series = {6th International EURASIP Workshop on RFID Technology (EURFID)}, booktitle = {6th International EURASIP Workshop on RFID Technology (EURFID)}, publisher = {IEEE}, pages = {8}, year = {2018}, abstract = {We present low-cost, high-efficient electromagnetic coupling between open ring geometry and a so-called butterfly structure on standard printed circuit boards (FR4) for the purpose of short range wireless data and power transfer at an UHF resonance frequency of 868 MHz. The components of the transfer system are characterized by simulation and experiments in terms of associated scattering parameters. Characterizing the efficiency of the coupled resonators, RF signal power transmission is examined for high power transfer as well as for low power DC supply utilizing a voltage doubler rectifier. With an enhanced butterfly structure coupler, unmodulated RF power transmission of 17.3 W is achieved with an efficiency of more than 95\%. Furthermore, signal transmission of Pulse-Width-Modulated (PWM) signals with frequencies up to 5 MHz is demonstrated.}, language = {en} } @inproceedings{DechantSeligerKennel2019, author = {Dechant, Eduard and Seliger, Norbert and Kennel, Ralph}, title = {A study of dielectric breakdown of a half-bridge switching cell with substrate integrated 650V GaN dies}, series = {2019 IEEE International Workshop on Integrated Power Packaging (IWIPP), Toulouse, France}, booktitle = {2019 IEEE International Workshop on Integrated Power Packaging (IWIPP), Toulouse, France}, year = {2019}, abstract = {This paper proposes an ultra-low inductance half-bridge switching cell with substrate integrated 650V GaN bare dies. A vertical parallel-plate waveguide structure with 100 μm layer thickness results in a commutation loop inductance of 0.5 nH resulting in a negligible drain-source voltage overshoot in the inductive load standard pulse test. On the other hand reliable circuit operation requires an assessment of the isolation strength of the thin dielectric layer in the main commutation loop, because critical high local electric fields might occur between the pads. Measurements of the dielectric breakdown voltage followed by a statistical failure analysis provide a characteristic life of 14.7 kV and a 10\% quantile of 13.5kV in the Weibull fitted data. This characteristic life depends strongly on the ambient temperature and drops to 4.1kV at 125°C. Additionally, ageing tests show an increasing in dielectric breakdown voltage after 500h, 1000h and 2000h at 125°C high-temperature storage due to resin densification processes.}, language = {en} } @article{DechantSeligerKennel2019, author = {Dechant, Eduard and Seliger, Norbert and Kennel, Ralph}, title = {Power cycling and temperature endurance test of a GaN switching cell with substrate integrated chips}, series = {Microelectronics Reliability}, volume = {100-101}, journal = {Microelectronics Reliability}, pages = {113372}, year = {2019}, abstract = {We present a reliability study of a half-bridge switching cell with substrate integrated 650 V GaN HEMTs. Power Cycling Testing with a ΔTj of 100 K has revealed thermo-mechanically induced failures of contact vias after more than 220 kcycles. The via failure mode of contact opening is confirmed by reverse-bias pulsed IV-measurements to be primarily triggered by a ΔTj imposed thermal gradient and not by a high Tj. The chip electrical characteristics, however, remained unaffected during Power Cycling. Furthermore, a High Temperature Storage test at 125 °C for 5000 h has shown no changes in the electrical performance of substrate integrated GaN HEMTs.}, language = {en} } @inproceedings{DechantSeligerKennel2019, author = {Dechant, Eduard and Seliger, Norbert and Kennel, Ralph}, title = {Performance of a GaN Half Bridge Switching Cell with Substrate Integrated Chips}, series = {PCIM Europe 2019 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, N{\"u}rnberg}, booktitle = {PCIM Europe 2019 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, N{\"u}rnberg}, pages = {7}, year = {2019}, abstract = {Wide-bandgap semiconductors such as Silicon Carbide (SiC) or Gallium Nitride (GaN) enable fast switching and high switching frequencies of power electronics. However, this potential can not be exploited due to limitations caused by parasitic elements of packaging and interconnections. This paper shows a possibility to minimize parasitic elements of a half-bridge switching cell with 650 V GaN dies integrated into a printed circuit substrate. A sub-nH commutation loop of 0.5 nH inductance gives superior switching characteristics compared to circuits with packaged dies. Simulation and experimental results of an inverse double pulse test confirm our expectations. This study further reveals additional benefits of the proposed technology in terms of mechanical stability and thermal interfacing to heat sinks compared to circuits with packaged dies.}, language = {en} } @inproceedings{SeligerDechantBrendeletal.2020, author = {Seliger, Norbert and Dechant, Eduard and Brendel, Christian and Kennel, Ralph}, title = {Reduction of Common Mode EMI noise in microstrip line based commutation paths designed for sub-nH loop inductance}, series = {CIPS 2020 - 11th International Conference on Integrated Power Electronics Systems, Berlin - Virtual Meeting}, booktitle = {CIPS 2020 - 11th International Conference on Integrated Power Electronics Systems, Berlin - Virtual Meeting}, pages = {6}, year = {2020}, abstract = {We present a numerical and experimental design study for reducing conducted common mode noise for frequencies below 10MHz generated in switching cells comprising sub-nH commutation loops. Compared to conventional methods of adding external gate resistors our approach does not degrade efficiency. A parallel plate loop design (characterized by a minimum loop inductance and small board area usage) is found suboptimal in terms of conducted EMI compared to a micro-strip line loop geometry. The net ground impedance rather than the net ground inductance is found to mainly contribute to the observed EMI noise.}, language = {en} } @inproceedings{DechantSeligerKennel2020, author = {Dechant, Eduard and Seliger, Norbert and Kennel, Ralph}, title = {Design of a Low Multi-Loop Inductance Three Level Neutral Point Clamped Converter with GaN HEMTs}, series = {IEEE Energy Conversion Congress and Exposition (ECCE)}, booktitle = {IEEE Energy Conversion Congress and Exposition (ECCE)}, publisher = {IEEE}, pages = {6}, year = {2020}, abstract = {This work shows a numerical and experimental analysis of a Neutral-Point-Clamp (NPC) three level inverter featuring an ultra low inductance printed circuit board (PCB) design in consideration of the mutual inductive and capacitive couplings. The commutation loops in this design are found to be strongly dependent on the vertical thickness of the used prepregs and the core. For vertical thicknesses ≤ 100 μm capacitive coupling must be taken into account in the switching cell design. Experimental measurements of a test set-up with a total PCB thickness of 400 μm results in commutation loop inductances from 1.4 nH up to 3.1 nH. In this set-up, switching tests without external gate resistor showed only a maximum voltage overshoot of 7\% at 800 V. Based on a numerical analysis of the NPC cell we propose a further switching performance improvement with significant smaller parasitic inductance due to the application of novel printed circuit technologies such as the integration of bare dies into the printed circuit board or polyimide as an interlayer dielectric material.}, language = {en} } @inproceedings{Seliger2021, author = {Seliger, Norbert}, title = {A Free Oscillating Half-Bridge Converter for Capacitively Coupled Wireless Power Transfer}, series = {IEEE 6th International Forum on Research and Technology for Society and Industry (RTSI)}, booktitle = {IEEE 6th International Forum on Research and Technology for Society and Industry (RTSI)}, publisher = {IEEE}, pages = {6}, year = {2021}, abstract = {In this research we present a short distance capacitively coupled wireless power transfer (WPT) system with a self-oscillating half-bridge converter, which uses a positive feedback signal from the WPT system. By this novel implementation we find additional features of the system compared to linear amplifier based systems. With the DC bias voltage supplying the power converter, we achieve a controllable output power, tunable self-oscillation frequency and extension of the self-oscillation range. We present the analytical expressions for the converter waveforms. The theoretical analysis is confirmed by circuit simulation results and measurements on a prototype featuring a half-bridge converter with Gallium-Nitide (GaN) HEMTs. We achieve a system efficiency of 93\% at a load power of 83W and 150kHz switching frequency.}, language = {en} } @inproceedings{Seliger2021, author = {Seliger, Norbert}, title = {Design of a Half-Bridge Converter for Self-Adapting Capacitive Wireless Power Transfer}, series = {IEEE 2021 CENCON conference}, booktitle = {IEEE 2021 CENCON conference}, publisher = {IEEE}, pages = {6}, year = {2021}, abstract = {We present the design of a half-bridge converter for a capacitively coupled wireless power transfer system. The load signal acts as a positive feedback signal for a self-oscillation circuit which generates the driving gate signals for the converter. Our research reveals a robust wireless operation for a large range of load resistors and coupling capacitors. Based on an electric network analysis we obtain design criteria for self-oscillation and for the power transfer. The theoretical predictions are confirmed by circuit simulation and measurement results on a converter prototype with GaN-HEMTs. We report on a transfer efficiency of 92\% for a power greater than 50W at a switching frequency of 300kHz and 200V DC link voltage.}, language = {en} } @inproceedings{Seliger2022, author = {Seliger, Norbert}, title = {Self-Oscillating Capacitive Power Transfer with Multiple Receiver Capability and Coupling Path Adaption}, series = {Proceedings 24th European Conference on Power Electronics and Applications (EPE'22 ECCE Europe)}, booktitle = {Proceedings 24th European Conference on Power Electronics and Applications (EPE'22 ECCE Europe)}, publisher = {EPE}, organization = {Labor f{\"u}r Leistungselektronik und EMV, TH Rosenheim}, pages = {6}, year = {2022}, language = {en} } @inproceedings{SeligerFaltlhauser2022, author = {Seliger, Norbert and Faltlhauser, Georg}, title = {Active Expansion Sampling of Magnetic Near-Fields in Unbounded Regions}, series = {Proceedings 26th IEEE Workshop on Signal and Power Integrity (IEEE SPI-2022)}, booktitle = {Proceedings 26th IEEE Workshop on Signal and Power Integrity (IEEE SPI-2022)}, publisher = {IEEE}, organization = {Labor f{\"u}r Leistungselektronik und EMV, TH Rosenheim}, pages = {4}, year = {2022}, language = {en} } @inproceedings{SeligerDechantKennel2022, author = {Seliger, Norbert and Dechant, Eduard and Kennel, Ralph}, title = {EMI mitigation by substrate integrated common mode filter}, series = {Proceedings of 12th International Conference on Integrated Power Electronics Systems (CIPS 2022)}, booktitle = {Proceedings of 12th International Conference on Integrated Power Electronics Systems (CIPS 2022)}, publisher = {VDE}, address = {Berlin (Germany)}, organization = {Labor f{\"u}r Leistungselektronik und EMV, TH Rosenheim}, year = {2022}, language = {en} } @inproceedings{Seliger2022, author = {Seliger, Norbert}, title = {A Differential Relaxation Oscillator for Inductive Power Transfer}, series = {2022 IEEE Industrial Electronics and Applications Conference (IEACon)}, booktitle = {2022 IEEE Industrial Electronics and Applications Conference (IEACon)}, publisher = {IEEE}, pages = {1 -- 6}, year = {2022}, abstract = {We present a novel differential relaxation oscillator for inductive power transfer. The proposed oscillator offers an automatic adaption of the oscillation period to a change in the power link impedance, which ensures a high efficient operation for variable loads and coupling factors. A detailed circuit model of the self-oscillation system is provided with analytical design equations. We find a large self-oscillation range for variable coupling factors and loads. The theoretical results are confirmed by circuit simulation and measurements carried out on a low-power demonstrator system. We demonstrate non-resonant and robust self-adaption of the relaxation oscillator to coupling factors ranging from k=0.6-0.9.}, language = {en} } @inproceedings{DechantSeligerKennel2022, author = {Dechant, Eduard and Seliger, Norbert and Kennel, Ralph}, title = {Common Mode DGS EMI Filter Integrated into a GaN Half Bridge Switching Cell}, series = {Procceedings International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 2022)}, booktitle = {Procceedings International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 2022)}, publisher = {Mesago}, organization = {Labor f{\"u}r Leistungselektronik und EMV, TH Rosenheim}, pages = {6}, year = {2022}, language = {en} } @inproceedings{Seliger2023, author = {Seliger, Norbert}, title = {A Differential Relaxation Half-Bridge Oscillator for Inductive Power Transfer}, series = {Proceedings PCIM Europe 2023}, booktitle = {Proceedings PCIM Europe 2023}, publisher = {Mesago GmbH}, address = {N{\"u}rnberg}, pages = {7}, year = {2023}, abstract = {We present inductive power transfer (IPT) with a half-bridge converter based on differential relaxation self-oscillation. The oscillation dynamics of the converter automatically adapts to variation in the inductive coupling link and changes in the load, respectively. Design equations based on theoretical circuit analysis reveals a high power transfer efficiency (>90\%) for alteration of coupling distance in the strong coupling regime. A prototype system employing GaN-HEMTs confirms the theoretically predicted characteristics of the proposed circuit.}, language = {en} } @article{SeligerFaltlhauser2023, author = {Seliger, Norbert and Faltlhauser, Georg}, title = {Progressive Expansion Sampling of Quasi-Static Magnetic Fields in Unconfined Regions}, series = {IEEE Transactions on Components, Packaging and Manufacturing Technology}, journal = {IEEE Transactions on Components, Packaging and Manufacturing Technology}, doi = {10.1109/TCPMT.2023.3283285}, pages = {9}, year = {2023}, abstract = {We present a fast and accurate measurement technique for quasi-static magnetic fields by employing a progressive sampling method in an unconfined input space. The proposed machine learning algorithm is tested against uniform sampling on printed circuit board test structures and a buck converter. We prove allocation of multiple, separated regions with predefined lateral field limits at MHz frequencies. The feasibility of equivalent magnetic dipole source modeling based on a small number of samples is demonstrated. Compared to uniform testing, progressive expansion sampling identifies contours of given field limits in less than 3\% of the reference measurement time.}, language = {en} } @inproceedings{SeligerFaltlhauser2023, author = {Seliger, Norbert and Faltlhauser, Georg}, title = {Progressive Expansion Sampling of Quasi-Static Magnetic Fields for EMI Noise Detection and Equivalent Source Modeling}, series = {Proceedings EMC Europe 2023}, booktitle = {Proceedings EMC Europe 2023}, publisher = {IEEE}, address = {Krakov}, pages = {6}, year = {2023}, abstract = {We introduce a quick and accurate quasi-static magnetic field scanning technique by employing a progressive sampling method in an unconfined input space. The proposed machine learning algorithm is tested against uniform sampling on a printed circuit board test structure. We prove allocation of multiple, separated regions with predefined tangential field strengths at MHz frequencies. The feasibility of equivalent magnetic dipole source modeling based on a small number of samples is demonstrated. Compared to uniform testing, progressive expansion sampling detects contours of given field limits in less than 3\% of the reference measurement time.}, language = {en} } @inproceedings{SeligerHonsa2023, author = {Seliger, Norbert and Honsa, Johannes}, title = {A Planar Magneto-Inductive Device with Modulated Mutual Inductance for Wireless Power Transmission}, series = {2023 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)}, booktitle = {2023 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)}, publisher = {IEEE}, address = {Venice (Italy)}, isbn = {979-8-3503-2060-2}, issn = {2766-287X}, doi = {10.1109/APWC57320.2023.10297488}, pages = {26 -- 31}, year = {2023}, abstract = {A Magneto-Inductive Wave (MIW) structure for wireless power transfer (WPT) is proposed with switchable mutual inductance between neighbored coupling coils. Orthogonally placed switchable short circuit loops are added in order to modulate the wave propagation properties of the MIW structure without changing the resonance frequency. We derive an analytical model based on lumped circuit analysis for the MIW waveguide and successfully evaluate the theoretical findings by circuit modeling and field simulation. We demonstrate switchable, i.e. addressable, guided wireless power transfer along an experimental MIW structure at a resonance frequency of 20.5 MHz.}, language = {en} } @inproceedings{SeligerHonsa2023, author = {Seliger, Norbert and Honsa, Johannes}, title = {Time-variable Mutual Inductance for Enhanced Inductive Power Transmission}, series = {Proceedings International Symposium on Fundamentals of Electrical Engineering 2023 (ISFEE 2023)}, booktitle = {Proceedings International Symposium on Fundamentals of Electrical Engineering 2023 (ISFEE 2023)}, publisher = {IEEE}, address = {Bucharest, Romania}, isbn = {tbd}, pages = {5}, year = {2023}, abstract = {Enhanced inductive power transmission (IPT) between coaxially arranged circular coils is introduced by time-modulation of the mutual inductance. This modulation is accomplished by coherent switching of the short circuit current induced in a third loop. An analytical circuit model supporting the design for future time-modulated IPT systems is derived. We demonstrate an increase in load rms-voltage by 13\% (28\% gain in power) compared to an unmodulated transfer on an experimental system operating at fundamental frequencies ranging from 40kHz to 500kHz.}, language = {en} } @inproceedings{SeligerHelmbrecht2024, author = {Seliger, Norbert and Helmbrecht, Cordula}, title = {A high-frequency performance and degradation study of adhesive conductive EMI shielding tapes during High-Temperature Storage}, series = {Proccedings CIPS 2024 - 13th International Conference on Integrated Power Electronics Systems}, booktitle = {Proccedings CIPS 2024 - 13th International Conference on Integrated Power Electronics Systems}, publisher = {VDE VERLAG GMBH}, address = {D{\"u}sseldorf}, isbn = {978-3-8007-6288-0}, issn = {0341-3934}, pages = {297 -- 303}, year = {2024}, abstract = {The variation of the contact impedance of adhesive conductive EMI shielding tapes under high temperature storage (HTS) of 110degC is investigated. The adhesive tapes under test are implemented as signal return paths in microstrip lines. Changes in the ground plane impedance by adhesive deterioration are analyzed by S-parameter measurements from 1MHz to 3GHz. A circuit model for contact impedance degradation is proposed and applied in simulation of board level shielding. Contact resistance and contact capacitance are found to increase significantly after 2400h, causing a declined magnetic field shielding effectiveness by 30 dB below 500 MHz.}, language = {en} } @inproceedings{Seliger2024, author = {Seliger, Norbert}, title = {Reconfigurable Polygonal Planar Inductor with Bistable Snapping Mechanism}, series = {2024 IEEE Open Conference of Electrical, Electronic and Information Sciences (eStream), Vilnius, Lithuania}, booktitle = {2024 IEEE Open Conference of Electrical, Electronic and Information Sciences (eStream), Vilnius, Lithuania}, isbn = {979-8-3503-5241-2}, issn = {2690-8506}, doi = {10.1109/eStream61684.2024.10542595}, pages = {1 -- 6}, year = {2024}, abstract = {A mechanically tunable planar single-turn inductor in air is proposed. The bistable flexible deflection of axially compressed wire segments is used for variation of the loop area of regular polygonal loop inductors. We present analytical expressions for the loop inductance and confirm the theoretical findings by magneto-quasi-static field simulation on exemplary polygonal circuits.}, language = {en} }