@inproceedings{NachtsheimGrundEndischetal.2023, author = {Nachtsheim, Martin and Grund, Karina and Endisch, Christian and Kennel, Ralph}, title = {Online Identification of Induction Machine Parameter Deviations for Aging Detection - A Comparative Study Using Recursive Least Squares Algorithm and Extended Kalman Filter}, booktitle = {2023 IEEE Transportation Electrification Conference \& Expo (ITEC)}, publisher = {IEEE}, address = {Piscataway}, isbn = {979-8-3503-9742-0}, doi = {https://doi.org/10.1109/ITEC55900.2023.10186964}, year = {2023}, language = {en} } @article{AzzamEhrensbergerScheueretal.2023, author = {Azzam, Mohamed and Ehrensberger, Moritz and Scheuer, Reinhard and Endisch, Christian and Lewerenz, Meinert}, title = {Long-Term Self-Discharge Measurements and Modelling for Various Cell Types and Cell Potentials}, volume = {16}, pages = {3889}, journal = {Energies}, number = {9}, publisher = {MDPI}, address = {Basel}, issn = {1996-1073}, doi = {https://doi.org/10.3390/en16093889}, year = {2023}, abstract = {Self-discharge of lithium-ion cells leads to voltage decay over time. In this work, the self-discharge was measured at 30 °C for three cell types at various voltage levels for about 150 days in a constant voltage mode determining the current at a high precision (float current). All cells exhibit a transient part leading to a steady-state, which is no longer influenced by reversible effects. To study the effect of the check-ups on the steady-state float current, the cells, interrupted and not interrupted by check-ups, were compared. The results indicate that both the transient processes and steady-state currents are highly reproducible. In the first period of the float current, the polarization dominates the measured current, followed by the anode overhang effect dominating the process for a period of 5-30 days. After the decline of both processes, a mostly constant steady-state in the order of µA is observed. The check-up interruption generally shows no apparent effect on the reached steady-state and results only in an extended settling time. A model to simulate the transient process and steady-state of float currents was developed. The model shows a high accuracy in reproducing the results and identifying the time needed to reach the steady-state.}, language = {en} } @inproceedings{TerbrackStoettnerEndisch2020, author = {Terbrack, Christoph and St{\"o}ttner, Julia and Endisch, Christian}, title = {Operation of an externally excited synchronous machine with a hybrid multilevel inverter}, booktitle = {2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-9-0758-1536-8}, doi = {https://doi.org/10.23919/EPE20ECCEEurope43536.2020.9215895}, year = {2020}, language = {en} } @inproceedings{LiebhartDiehlEndisch2020, author = {Liebhart, Bernhard and Diehl, Simon and Endisch, Christian}, title = {Sensitivity analysis of battery cell aging estimators based on impedance spectroscopy regarding temperature compensation}, booktitle = {IEEE CCTA 2020, 4th IEEE Conference on Control Technology and Applications}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-7281-7140-1}, doi = {https://doi.org/10.1109/CCTA41146.2020.9206395}, pages = {699 -- 705}, year = {2020}, language = {en} } @inproceedings{MuellerVoegeleEndisch2016, author = {M{\"u}ller, Tino and V{\"o}gele, Ulrich and Endisch, Christian}, title = {Disturbance compensation for iterative control of suspension durability test rigs}, booktitle = {2016 IEEE International Conference on Advanced Intelligent Mechatronics (AIM)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-5090-2065-2}, doi = {https://doi.org/10.1109/AIM.2016.7577011}, pages = {1675 -- 1681}, year = {2016}, language = {en} } @article{MuellerZiegmannKrueneretal.2016, author = {M{\"u}ller, Tino and Ziegmann, Johannes and Kr{\"u}ner, Simon and Endisch, Christian}, title = {Optimization of inverse model identification for multi-axial test rig control}, volume = {2016}, pages = {01002}, journal = {MATEC Web of Conferences}, number = {42}, publisher = {EDP Sciences}, address = {Les Ulis}, issn = {2261-236X}, doi = {https://doi.org/10.1051/matecconf/20164201002}, year = {2016}, abstract = {Laboratory testing of multi-axial fatigue situations improves repeatability and allows a time condensing of tests which can be carried out until component failure, compared to field testing. To achieve realistic and convincing durability results, precise load data reconstruction is necessary. Cross-talk and a high number of degrees of freedom negatively affect the control accuracy. Therefore a multiple input/multiple output (MIMO) model of the system, capturing all inherent cross-couplings is identified. In a first step the model order is estimated based on the physical fundamentals of a one channel hydraulic-servo system. Subsequently, the structure of the MIMO model is optimized using correlation of the outputs, to increase control stability and reduce complexity of the parameter optimization. The identification process is successfully applied to the iterative control of a multi-axial suspension rig. The results show accurate control, with increased stability compared to control without structure optimization.}, language = {en} } @inproceedings{AltmannshoferEndischMartinetal.2016, author = {Altmannshofer, Simon and Endisch, Christian and Martin, Jan and Gerngroß, Martin and Limbacher, Reimund}, title = {Robust estimation of vehicle longitudinal dynamics parameters}, booktitle = {2016 IEEE Intelligent Vehicles Symposium (IV)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-5090-1821-5}, doi = {https://doi.org/10.1109/IVS.2016.7535443}, pages = {566 -- 571}, year = {2016}, language = {en} } @inproceedings{AltmannshoferEndisch2016, author = {Altmannshofer, Simon and Endisch, Christian}, title = {Robust Vehicle Mass and Driving Resistance Estimation}, booktitle = {2016 American Control Conference (ACC)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4673-8682-1}, issn = {2378-5861}, doi = {https://doi.org/10.1109/ACC.2016.7526754}, pages = {6869 -- 6874}, year = {2016}, language = {en} } @inproceedings{AltmannshoferMartinEndisch2015, author = {Altmannshofer, Simon and Martin, Jan and Endisch, Christian}, title = {Robuste, onlinef{\"a}hige Sch{\"a}tzung von Fahrzeugmasse und Fahrwiderst{\"a}nden}, booktitle = {Autoreg 2015: auf dem Weg zum automatisierten Fahren}, publisher = {VDI Verlag}, address = {D{\"u}sseldorf}, isbn = {978-3-18-092233-1}, pages = {29 -- 36}, year = {2015}, language = {de} } @inproceedings{VoegeleEndisch2015, author = {V{\"o}gele, Ulrich and Endisch, Christian}, title = {Potential analysis of predictive optimal velocity control for electric and conventional vehicles}, booktitle = {2015 IEEE International Conference on Vehicular Electronics and Safety (ICVES)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4673-9114-6}, doi = {https://doi.org/10.1109/ICVES.2015.7396917}, pages = {196 -- 201}, year = {2015}, language = {en} } @inproceedings{MartinVoegeleEndisch2015, author = {Martin, Jan and V{\"o}gele, Ulrich and Endisch, Christian}, title = {Effects of errors in position- and navigation data on predictive vehicle operational strategy optimization}, booktitle = {2015 IEEE International Conference on Vehicular Electronics and Safety (ICVES)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4673-9114-6}, doi = {https://doi.org/10.1109/ICVES.2015.7396916}, pages = {190 -- 195}, year = {2015}, language = {en} } @inproceedings{StenzelRichnowFrankeetal.2015, author = {Stenzel, Peer and Richnow, Jan and Franke, J{\"o}rg and Endisch, Christian}, title = {Impact of the needle winding technology on the operational behavior of an asynchronous machine}, booktitle = {2015 5th International Electric Drives Production Conference (EDPC)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4673-7512-2}, doi = {https://doi.org/10.1109/EDPC.2015.7323193}, year = {2015}, language = {en} } @inproceedings{JardanVargaStumpfetal.2015, author = {J{\´a}rd{\´a}n, Rafael K. and Varga, Zolt{\´a}n and Stumpf, P{\´e}ter and Nagy, Istvan and Endisch, Christian and Sipos, P{\´e}ter and Simon, Mikl{\´o}s}, title = {Development of a Dedicated Laboratory System for Measurement of Iron Losses in High Speed PMSM}, booktitle = {2015 IEEE International Conference on Industrial Technology (ICIT)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4799-7800-7}, doi = {https://doi.org/10.1109/ICIT.2015.7125181}, pages = {708 -- 713}, year = {2015}, language = {en} } @inproceedings{StenzelDollingerRichnowetal.2015, author = {Stenzel, Peer and Dollinger, P. and Richnow, Jan and Bader, T. and Franke, J{\"o}rg and Endisch, Christian}, title = {Experimental investigations of the needle winding technology regarding the influence of the wire guide geometry on the tensile wire force}, booktitle = {2015 IEEE International Conference on Industrial Technology (ICIT)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4799-7800-7}, doi = {https://doi.org/10.1109/ICIT.2015.7125487}, pages = {2642 -- 2649}, year = {2015}, language = {en} } @inproceedings{StenzelDollingerMihajlovicetal.2014, author = {Stenzel, Peer and Dollinger, P. and Mihajlovic, D. and Richnow, Jan and Franke, J{\"o}rg and Endisch, Christian}, title = {Needle winding for distributed round-wire-windings without the use of insulation disks}, booktitle = {Proceedings: 2014 4th International Electric Drives Production Conference (E|DPC)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4799-5009-6}, doi = {http://doi.org/10.1109/EDPC.2014.6984387}, year = {2014}, language = {en} } @inproceedings{RichnowStenzelRenneretal.2014, author = {Richnow, Jan and Stenzel, Peer and Renner, A. and Gerling, D. and Endisch, Christian}, title = {Influence of different impregnation methods and resins on thermal behavior and lifetime of electrical stators}, booktitle = {Proceedings: 2014 4th International Electric Drives Production Conference (E|DPC)}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-1-4799-5009-6}, doi = {https://doi.org/10.1109/EDPC.2014.6984406}, year = {2014}, language = {en} } @inproceedings{NachtsheimBetzEndisch2022, author = {Nachtsheim, Martin and Betz, Michael and Endisch, Christian}, title = {Explicit analytical approach for electromagnetic modeling of arbitrary pole pair induction machines}, booktitle = {2022 12th International Conference on Power, Energy and Electrical Engineering (CPEEE)}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-6654-2049-5}, doi = {https://doi.org/10.1109/CPEEE54404.2022.9738660}, pages = {41 -- 48}, year = {2022}, language = {en} } @inproceedings{SchneiderLiebhartEndischetal.2022, author = {Schneider, Dominik and Liebhart, Bernhard and Endisch, Christian and Kennel, Ralph}, title = {Enhanced state and parameter estimation within reconfigurable battery systems for electric vehicles}, booktitle = {2022 12th International Conference on Power, Energy and Electrical Engineering (CPEEE)}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-6654-2049-5}, doi = {https://doi.org/10.1109/CPEEE54404.2022.9738700}, pages = {71 -- 77}, year = {2022}, language = {en} } @article{TheilerSchneiderEndisch2023, author = {Theiler, Michael and Schneider, Dominik and Endisch, Christian}, title = {Experimental Investigation of State and Parameter Estimation within Reconfigurable Battery Systems}, volume = {9}, pages = {145}, journal = {Batteries}, number = {3}, publisher = {MDPI}, address = {Basel}, issn = {2313-0105}, doi = {https://doi.org/10.3390/batteries9030145}, year = {2023}, abstract = {The battery system is one of the most-important, but also -critical components in the electric power-train. The battery's system states and parameters are commonly tracked by the battery monitoring system. However, in reality, the accuracy of the state and parameter estimation may suffer from insufficient excitation of the system. Since the current states and parameters serve as the basis for many battery management system functions, this might lead to incorrect operation and severe damage. Reconfigurable battery systems allow enhancing the system's excitation by applying a switching operation. In this contribution, the state and parameter estimation of a reconfigurable battery module were simulated and tested experimentally. Thereby, a low-exciting and a high-exciting drive cycle were compared. Furthermore, the switching patterns were applied to enhance the excitation and, hence, improve the estimation of an extended Kalman filter. The cells were switched via a pulse-width modulation signal, and the influence of frequency and duty cycle variation on the estimation accuracy were investigated. Compared to the low-excitation input, a significant improvement in the estimation of up to 46\% for the state of charge and 78\% for the internal resistance were achieved. Hereby, low frequencies and duty cycles proved to be particularly advantageous. Switching, however, has only a limited influence on an already highly excited system and may lead to additional aging due to higher heat generation.}, language = {en} } @article{NachtsheimErnstEndischetal.2023, author = {Nachtsheim, Martin and Ernst, Johannes and Endisch, Christian and Kennel, Ralph}, title = {Performance of Recursive Least Squares Algorithm Configurations for Online Parameter Identification of Induction Machines in an Automotive Environment}, volume = {9}, journal = {IEEE Transactions on Transportation Electrification}, number = {3}, publisher = {IEEE}, address = {Piscataway}, issn = {2332-7782}, doi = {https://doi.org/10.1109/TTE.2023.3244619}, pages = {4236 -- 4254}, year = {2023}, language = {en} }