TY - CHAP A1 - Staudt, Stefan A1 - Büdel, Johannes A1 - Kowalski, Thomas A1 - Lang, Klaus A1 - Teigelkötter, Johannes A1 - Stock, Alexander T1 - Optimized Modulation Schemes for the Efficiency Enhancement of Low Voltage Traction Drives T2 - 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe) N2 - This paper will present different modulation schemes for optimizing the efficiency of low-voltage traction drives. The converter of the vehicle automatically has to select the most suitable modulation or control scheme depending on the present operating point in order to maximize the efficiency of the complete drive train. Furthermore, the functional principles and algorithms of the individual modulation schemes will be presented, as well as the transition between those schemes. Finally, the performance of the different schemes will be proved by dynamic and stationary tests through fully automatized measurement analysis. KW - Converter machine interactions KW - Electrical machine KW - Direct torque and flux control KW - Measurement KW - ulseWidth Modulation (PWM) KW - Elektrische Maschine KW - Niederspannung KW - Elektroantrieb Y1 - 2017 UR - https://ieeexplore.ieee.org/document/8098998 U6 - https://doi.org/10.23919/EPE17ECCEEurope.2017.8098998 ER - TY - CHAP A1 - Stock, Alexander A1 - Teigelkötter, Johannes A1 - Staudt, Stefan A1 - Büdel, Johannes T1 - Highly Dynamic Calculation of Power Quantities and Further Analysis of Inverter-Fed Machines T2 - 2018 20th European Conference on Power Electronics and Applications (EPE'18 ECCE Europe) N2 - In this contribution, a highly dynamic calculation method of power quantities and additional electrical quantities, such as RMS values and fundamental waveforms, is presented. Typically, these quantities are calculated periodically based on the fundamental cycle of the electrical voltages and currents. Hence, they are well defined during steady state conditions for ideal periodical waveforms. During dynamic balancing processes, electrical signals are non-periodic. In a strict sense, the fundamental cycle-based definitions, which are well known from the literature, are not valid for these transient signals. However, this paper presents a novel definition for the calculation of cycle-based quantities based on the switching cycle of the inverter output voltages. This definition delivers instantaneous results during transient balancing processes, whereby it approximates the conventional fundamental cycle-based definitions during the steady state. KW - Elektrische Maschine KW - Umrichter Y1 - 2018 UR - https://ieeexplore.ieee.org/document/8515600 SN - 978-1-5386-4145-3 ER -