자기적 비선형발생을 고려한 변칙적자동분석의 유한요소해석에 관한 연구

A Study on the Analysis for the Nonlinear Magnetic Flux Distribution of a Transformer by Finite Element Method

This study is to analyze the nonlinear characteristics of magnetic flux distribution of a transformer by Finite Element Method using 2-dimensional elements. To accomplish this, first a single phase shell-type transformer is selected a model to be analyzed, and the element equation is derived by the vriational approach. And then using the numerical approximation of a magnetization curve and the Direct Convergence Method which is presented in this study, the magnetic nonlinear characteristic is analyzed. In this consequence, the resultant values are converged within 10 iterations of calculation. And in the comparison with the case of linear analysis, these results are more accurate and reasonable.