Two-dimensional Magnetostriction Analysis Using E&S-W Model on Transformer Model Core

Abstract

This paper presents two-dimensional magnetostriction analysis using a numerical method of two-dimensional magnetostriction (E&S-W model) on transformer model core. In order to reduce vibration and acoustic noise of transformer, it is necessary to evaluate the magnetostriction on the magnetic core. The two-dimensional magnetostriction on electrical steel sheet has been measured. The E&S-W model has been suggested in order to estimate the two-dimensional magnetostriction under non-sinusoidal magnetic flux condition. It is possible to analyze the two-dimensional magnetostriction on magnetic core using vector magnetic characteristics analysis and the E&S-W model. In this method, the distribution of peak-to-peak two-dimensional magnetostriction and the relationship between magnetic flux density vector and principal magnetostriction of expansion and contraction were made clear. The distribution of peak-to-peak two-dimensional magnetostriction was not similar to the distribution of maximum magnetic flux density.