Simulation Modeling of Unidirectional Dynamic Remagnetization of Electrical Steel

Abstract

The problem of modeling unidirectional dynamic remagnetization of electrical steel in periodic modes, in-cluding sinusoidal and non-sinusoidal changes in the average cross-section of the induction sheet, is consid-ered and solved. The relevance of the problem under consideration is determined by the fact that when design-ing semiconductor pulse converters of power supply systems operating in peak load modes, it becomes neces-sary to calculate their characteristics and parameters with a more accurate setting of the magnetic characteris-tics of steel, taking into account the real processes of dynamic magnetization reversal observed in the magnetic circuits of transformers and chokes. The proposed simulation model of dynamic magnetization reversal of a ferromagnet allows us to describe with acceptable accuracy the nonlinear, hysteresis and dynamic properties and characteristics of steel, including hysteresis loops, the main magnetization curves, and losses. The performed modernization of the classical Giles – Atherton(JA) model makes it possible to take into account and approxi-mately describe the eddy currents and magnetic viscosity that appear during dynamic remagnetization. The de-veloped numerical procedure allows you to identify the parameters of the constructed model and configure it. The results of the performed validation of the model using experimental data confirm the possibility of its application to describe the characteristics of electrical steel in dynamic modes of remagnetization.