@inproceedings{StockTeigelkoetterStaudtetal.2015, author = {Stock, Alexander and Teigelk{\"o}tter, Johannes and Staudt, Stefan and Kowalski, Thomas}, title = {The Doubly Fed Permanent Magnet Synchronous Machine as a Highly Efficient Drive System for Constant Speed Applications}, series = {IEEE 11th International Conference on Power Electronics and Drive Systems (PEDS)}, booktitle = {IEEE 11th International Conference on Power Electronics and Drive Systems (PEDS)}, editor = {IEEE,}, address = {Sydney, Australia}, doi = {10.1109/PEDS.2015.7203399}, pages = {625 -- 630}, year = {2015}, subject = {Wechselrichter}, language = {en} } @inproceedings{BuedelKuhlmannHerkommeretal.2021, author = {B{\"u}del, Johannes and Kuhlmann, Kai and Herkommer, Christian and Teigelk{\"o}tter, Johannes}, title = {Advanced Control Methods for High Performance Dual Two-Level Inverter for Traction Application}, series = {Electromechanical Drive Systems 2021; ETG Symposium; 9-10 Nov. 2021}, booktitle = {Electromechanical Drive Systems 2021; ETG Symposium; 9-10 Nov. 2021}, isbn = {978-3-8007-5685-8}, year = {2021}, abstract = {The topology of the dual two-level inverter in combination with an electrical machine with open-end winding is an optimal solution for the realization of high requirements from the automotive sector for high-performance traction drives. In this publication, methods for extending the operating range and improving output voltage and current quality are presented for synchronous as well as asynchronous PWM methods for the entire operating range for this system configuration. Emphasis is placed on symmetrical power sharing between the inverters to maximize the power range. Optimal integration of the system is achieved by the topology-related possibility of DC fast charging of the energy storages from a DC grid without an additional charging unit.}, subject = {Wechselrichter}, language = {en} } @inproceedings{BuedelTeigelkoetterStock2019, author = {B{\"u}del, Johannes and Teigelk{\"o}tter, Johannes and Stock, Alexander}, title = {Optimized Dual Two-Level Inverter for Safe and Reliable Operation of Machines with Superconductive Stator Windings}, series = {2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe)}, booktitle = {2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe)}, isbn = {978-1-7281-2361-5}, doi = {10.23919/EPE.2019.8915524}, year = {2019}, abstract = {This paper aims to present an optimized inverter topology, based on the dual two-level inverter, for feeding an open-end winding electrical machine with superconductive stator windings and a superconductive rotor. In order to achieve a high torque density, the stator windings are built of several superconducting tapes being in parallel. One inverter of the dual two-level inverter is equipped with powerful IGBT semiconductors and supplies the machine with energy. The second inverter is a low voltage MOSFET inverter that monitors the superconductor resistance (quench detection) and balances the current on the parallel superconductive tapes for guaranteeing an optimum operation with respect to the superconductive losses.}, subject = {Elektrische Maschine}, language = {en} } @inproceedings{BuedelTeigelkoetterStocketal.2020, author = {B{\"u}del, Johannes and Teigelk{\"o}tter, Johannes and Stock, Alexander and Herkommer, Christian and Kuhlmann, Kai}, title = {High Dynamic Power Balancing for Dual Two-Level Inverters during High-Speed Machine Operation}, series = {2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)}, booktitle = {2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)}, isbn = {978-1-7281-9807-1}, doi = {10.23919/EPE20ECCEEurope43536.2020.9215695}, year = {2020}, abstract = {This paper aims to present optimized square-wave modulation strategies for the dual two-level inverter, fed by two separate and galvanically isolated energy sources, to balance and control the energy distribution of both inverter systems. Especially for high-speed operation, the methods keep the machine in the required state while decreasing the switching operations to a minimum. Method one aims to compensate voltage fluctuations of variable DC-link voltages, while the second method ensures a symmetrical power distribution for the two inverter systems. In addition, both methods offer the possibility of adapting the amplitude of the usually fixed fundamental load voltage during square-wave modulation.}, subject = {Wechselrichter}, language = {en} } @article{BuedelTeigelkoetter2019, author = {B{\"u}del, Johannes and Teigelk{\"o}tter, Johannes}, title = {Doppelzweipunktwechselrichter f{\"u}r Elektrofahrzeuge - Systemeigenschaften und Steuerung}, series = {Elektrische Antriebstechnologie f{\"u}r Hybrid- und Elektrofahrzeuge}, volume = {2019}, journal = {Elektrische Antriebstechnologie f{\"u}r Hybrid- und Elektrofahrzeuge}, number = {149}, editor = {Sch{\"a}fer, Heinz}, pages = {114 -- 127}, year = {2019}, abstract = {Im vorliegenden Beitrag wird die Topologie des Doppelzweipunktwechselrichters f{\"u}r die Anwendung in Elektrofahrzeugen vorgestellt. Dazu werden zun{\"a}chst der Schaltungsaufbau und die spezifischen Schaltungseigenschaften n{\"a}her erl{\"a}utert. Anschließend werden relevante Vorteile dieser Topologie f{\"u}r die Anwendung in Elektrofahrzeugen dargestellt. F{\"u}r die Kombination unterschiedlicher Energiequellen mit Hilfe des Doppelzweipunktwechselrichters werden geeignete Steuerungsstrategien pr{\"a}sentiert und anhand von realen Messungen am Systempr{\"u}fstand verifiziert. Mit dem Vorgestellten Verfahren kann die Leistungsaufteilung auf die beiden Energiespeicher und deren Energieaustausch untereinander mit hohem Freiheitsgrad gesteuert werden.}, subject = {Elektrofahrzeug}, language = {de} } @inproceedings{BuedelKuhlmannTeigelkoetter2024, author = {B{\"u}del, Johannes and Kuhlmann, Kai and Teigelk{\"o}tter, Johannes}, title = {Improved DC-Charging for Traction Drives with Hybrid Powered Dual Two-Level Inverter}, series = {2023 25th European Conference on Power Electronics and Applications (EPE'23 ECCE Europe)}, booktitle = {2023 25th European Conference on Power Electronics and Applications (EPE'23 ECCE Europe)}, doi = {10.23919/EPE23ECCEEurope58414.2023.10264409}, year = {2024}, abstract = {This contribution aims to present a new concept for power sharing of traction drives supplied by local DC grids such as partly or full equipped trolley wire nets. Therefore, a dual two-level inverter with two separate energy storages and an open-end winding machine is used. New control algorithms allow the charging of the energy sources whether two batteries, a combination of a battery and a fuel cell or a combination of battery and a flying capacitor is used. Within the scope of battery performance, this application is able to absorb or deliver the required power from a DC grid and still feed the electrical machine to enable a driving movement of the electric vehicle. As the presented concepts enable voltage balancing due to different battery loads and the use of only one dynamic energy storage in the charging operation, the shown application aims to achieve the high utilization of an electric vehicle powered by a (partly equipped) DC-grid.}, subject = {Wechselrichter}, language = {en} } @inproceedings{BuedelHerkommerKuhlmannetal.2021, author = {B{\"u}del, Johannes and Herkommer, Christian and Kuhlmann, Kai and Teigelk{\"o}tter, Johannes}, title = {Advanced DC-charging Methods for Traction Drives with Dual Two-Level Inverter During Machine Operation}, series = {2021 23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)}, booktitle = {2021 23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)}, doi = {10.23919/EPE21ECCEEurope50061.2021.9570611}, year = {2021}, abstract = {This paper aims to present a concept and especially developed control methods for an open-end winding traction drive, powered by a dual two-level inverter, where the two separate energy sources can be charged via a DC grid during operation and while being standstill. For achieving a high quality DC-current, the parasitic Back-EMF harmonics of the electrical machine will be compensated. The application aims to achieve high utilisation of the electric vehicle in combination with a partly equipped trolley wire net.}, subject = {Wechselrichter}, language = {en} }