Analysis of history-dependent hysteresis models of soft magnetic materials

V magistrskem delu je izvedena analiza zgodovinsko odvisnih histereznih modelov. Sodobni električni stroji in naprave so pogosto napajani s pretvorniki močnostne elektronike, ki povzročajo zapletene poteke magnetnih veličin v feromagnetnih jedrih. Trenutno uveljavljeni modeli so v večini primerov zgodovinsko neodvisni in niso zmožni pravilno opisati oblike malih zank znotraj limitne statične histerezne zanke, kar posledično privede do napačne ocene energijskih izgub v ciklu magnetenja. Za izboljšanje metod načrtovanja in dvig izkoristka sodobnih naprav je posledično potrebno razviti in uporabljati bolj točne modele, ki upoštevajo zgodovino magnetenja in ustrezno opišejo magnetilne krivulje tudi v primeru zapletenih neharmoničnih vzbujanj. Za izvedbo analize smo implementirali Zirka-Morozov in Loss-Surface histerezna modela, ki spadata v skupino fenomenoloških zgodovinsko odvisnih histereznih modelov. Analizo smo izvedli simulacijsko s programskim paketom Matlab/Simulink. Za oba modela smo na osnovi izvedenih analiz ugotovili, da upoštevata Madelungova pravila za zgradbo magnetilnih krivulj znotraj limitne statične histerezne zanke in zelo dobro opisujeta poljubne statične magnetilne pojave. Modela smo primerjali tudi med seboj in izpostavili prednosti in slabosti vsakega modela.In the master\u27s thesis we performed an analysis of history-dependent hysteresis models. Contemporary electrical machines are often powered by power electronic converters, which cause complex waveforms of magnetic quantities in the ferromagnetic cores of those machines. Currently established hysteresis models are in most cases history independent and are not able to correctly describe the shape of minor loops within the major hysteresis loop, which leads to an incorrect calculation of energy losses in the magnetization cycle. To improve design methods and increase the efficiency of modern electrical devices, it is consequently necessary to develop and use more accurate hysteresis models that consider the magnetization history and adequately describe the magnetization even in the case of complex non-harmonic excitations. To perform the analysis, we implemented the Zirka Moroz and Loss-Surface hysteresis models, which are classified as phenomenological history-dependent hysteresis models. The analysis was performed by simulation using the Matlab/Simulink software package. For both models, based on the performed analyses, we concluded that they comply with Madelung\u27s rules when generating magnetization curves within the major loop and describe any static magnetization phenomena very well. We also compared the models with each other and highlighted the advantages and disadvantages of individual model