Magnetic Properties of Silicon Steel Plate Excited With Distorted Wave Voltage

Abstract

The AC magnetic characteristics of an iron core vary depending on the magnetization conditions. As power semiconductor devices come to be used in control system a knowledge of the magnetic properties of the equipment using a distorted input is required. This paper described the effect of high harmonic flux distortion on the magnetic properties of silicon steel plate.
In performing the analysis, the magnetization characteristics is approximated by Fourie-series. And the assumption in which eddy current factor is proportional to the rate of change of the flux is adopted. From the result of numerical analysis, relation between distortion factor and iron loss, exciting apparent power and high harmonics of exciting current are clarified. The results of the analysis were confirmed by experiments.