Modeling of magnetization curves in nonoriented electrical steel sheets

AbstractThis paper discusses the modeling of magnetization curves in nonoriented electrical steel sheets. The initial curve and hysteresis loop below 0.15 T are approximately modeled by the Rayleigh model, and the Rayleigh loop constants are nearly proportional to the crystalline grain size. Hysteresis loops above 0.15 T in the magnetization rotation region are represented by the Preisach model, with consideration of the grain size distribution and the RD easy axis. Magnetization curves above 10 kA/m are calculated by the magnetization rotation model. However, magnetization curve modeling is necessary between the domain displacement model and the magnetization rotation regions. Magnetization curves in this region are modeled considering the field component ${B^N}$, where B is the flux density and N is the order of the flux density and is equal to about 15. © 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 180(3): 1–8, 2012; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.21296