Comparative analysis of the magnetization curve mathematical models

Abstract

It was studied that the representation of the magnetization curve model by the assemblage of parabola and straight line allows three times higher accuracy of the series excitation direct-current motor universal magnetization curve approximation, then the representation of this magnetization curve by the mathematical model based on arctangent approximation of the magnetization curve. It was shown that the second mathematical model, as distinct from the first mathematical model, unsuitable for being used in the task of minimizing of the series excitation direct-current motor electric losses.