%0 Thesis %1 ZhaokaiYin14.04.2019 %A Yin, Zhaokai %C Stuttgart %D 2019-04-14 %E Waldhof, Marcel %I Institut für elektrische Energiewandlung %K iew_stua_em integrated_on-board_charger,_transformer,_six-phase_electrical_machine,_FEM,_optimization. %T Optimierung von elektrischen Maschinen für Transformator- und Traktionsanwendungen in EVs: Electrical Machine Optimizations for EV Transformer and Traction Applications %X The investigation of transformer operation is based on FEM1 simulation, which is implemented through the Bosch developed FEM tool Edyson. As Edyson is especially designed for the simulation of electrical machines, a practical problem faced with the analysis of transformers is the lack of load character. In order to take the load into consideration, which is regard as a significant part of the transformer simulation, a method called co-simulation is established. With this kind of simulation method, accurate results of transformer simulation, for instance, the efficiency; power factor; inductance matrix; and coupling coefficient, are achievable. Furthermore, several concepts of multi-utilization of electrical machine as transformer are discussed and calculated. These concepts are initially based on a six-phase electrical machine and vary in view of rotor type and stator winding layout. At first, a three-phase transformer based on the original geometry of a six-phase squirrel cage induction machine is studied. In addition, another type of rotor is then discussed, where the rotor is supplied with an additional winding and hence a DC excited synchronous motor is formed. The performance of different transformer types are evaluated and compared with the corresponding results, for example the efficiency, coupling coefficient, etc. Finally, the optimization of the transformer over different winding layouts and parameters is implemented. In this case, the character of material is assumed optimal and the start-ing point for optimization is merely focused on the magnetic path and electromagnetic coupling. Based on the original stator winding layout in motor mode, some innovative winding layouts for transformer are proposed. Those new layouts have an advantage of better magnetic coupling and higher efficiency. In addition, several parameters that have potential influence of the performance of transformer are proposed and verified. What needs to be emphasized here is that the modification of machine parameters may have multi influence of the performance in motor mode. This fact is also taken into considera-tion and a compromise solution is obtained for the both operation modes. %Z Masterarbeit

@mastersthesis{ZhaokaiYin14.04.2019, abstract = {The investigation of transformer operation is based on FEM1 simulation, which is implemented through the Bosch developed FEM tool Edyson. As Edyson is especially designed for the simulation of electrical machines, a practical problem faced with the analysis of transformers is the lack of load character. In order to take the load into consideration, which is regard as a significant part of the transformer simulation, a method called co-simulation is established. With this kind of simulation method, accurate results of transformer simulation, for instance, the efficiency; power factor; inductance matrix; and coupling coefficient, are achievable. Furthermore, several concepts of multi-utilization of electrical machine as transformer are discussed and calculated. These concepts are initially based on a six-phase electrical machine and vary in view of rotor type and stator winding layout. At first, a three-phase transformer based on the original geometry of a six-phase squirrel cage induction machine is studied. In addition, another type of rotor is then discussed, where the rotor is supplied with an additional winding and hence a DC excited synchronous motor is formed. The performance of different transformer types are evaluated and compared with the corresponding results, for example the efficiency, coupling coefficient, etc. Finally, the optimization of the transformer over different winding layouts and parameters is implemented. In this case, the character of material is assumed optimal and the start-ing point for optimization is merely focused on the magnetic path and electromagnetic coupling. Based on the original stator winding layout in motor mode, some innovative winding layouts for transformer are proposed. Those new layouts have an advantage of better magnetic coupling and higher efficiency. In addition, several parameters that have potential influence of the performance of transformer are proposed and verified. What needs to be emphasized here is that the modification of machine parameters may have multi influence of the performance in motor mode. This fact is also taken into considera-tion and a compromise solution is obtained for the both operation modes.}, added-at = {2022-10-25T14:13:37.000+0200}, address = {Stuttgart}, annote = {{Masterarbeit}}, author = {Yin, Zhaokai}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/21ea18e12fd74364b25d1b37bbf2591d4/iew_homepage}, editor = {Waldhof, Marcel}, editortype = {collaborator}, file = {Yin 14.04.2019 - Optimierung von elektrischen Maschinen:S\:\\Mitarbeiter\\01_Bibliothek\\01_Literatur\\Citavi Attachments\\Yin 14.04.2019 - Optimierung von elektrischen Maschinen.pdf:pdf;Yin 14.04.2019 - Optimierung von elektrischen Maschinen (3):S\:\\Mitarbeiter\\01_Bibliothek\\01_Literatur\\Citavi Attachments\\Yin 14.04.2019 - Optimierung von elektrischen Maschinen (3).pdf:pdf}, interhash = {3ec050ae2c1cac4c732005f7339d837e}, intrahash = {1ea18e12fd74364b25d1b37bbf2591d4}, keywords = {iew_stua_em integrated_on-board_charger,_transformer,_six-phase_electrical_machine,_FEM,_optimization.}, publisher = {Institut f{\"u}r elektrische Energiewandlung}, school = {{Universit{\"a}t Stuttgart}}, timestamp = {2022-10-25T12:14:06.000+0200}, title = {{Optimierung von elektrischen Maschinen f{\"u}r Transformator- und Traktionsanwendungen in EVs: Electrical Machine Optimizations for EV Transformer and Traction Applications}}, year = {2019-04-14} }