@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} } @inproceedings{BuedelTeigelkoetterStocketal.2021, author = {B{\"u}del, Johannes and Teigelk{\"o}tter, Johannes and Stock, Alexander and Kuhlmann, Kai and Lang, Klaus and Ott, Patrick}, title = {Testing of High-Power Traction Batteries}, series = {SMSI 2021 - System of Units and Metreological Infrastructure}, booktitle = {SMSI 2021 - System of Units and Metreological Infrastructure}, isbn = {978-3-9819376-4-0}, doi = {10.5162/SMSI2021/C7.}, pages = {294 -- 295}, year = {2021}, abstract = {Electric drives in road vehicles with a battery as energy storage are about to be introduced to the mass market. In order to guarantee the quality and operational safety of battery-powered vehicles, considerable efforts must be made by car manufacturers and their suppliers. Since the properties of the batteries significantly determine the performance of the vehicles, special test benches with precise measuring systems are required for the accurate determination of the battery properties. The safety devices of the traction batteries must also be tested on high-performance test benches. In this paper the necessary test benches and the corresponding measuring systems are presented. Estimations of the measurement uncertainty and possibilities to increase measurement accuracy are presented.}, subject = {Traktionsbatterie}, language = {en} }