MAGNETIC FIELD COMPUTATION OF A LOADED TRANSFORMER

Abstract

A simple numerical method based on integral approach was described to compute the stray magnetic field in the surrounding region of a loaded distribution transformer. The model for magnetic field computation was made of transformer windings and low voltage conductors. Windings were modeled by rectangular and round blocks with uniform amper-turn distribution throughout the winding cross section. Low voltage conductors were modeled as series of straight current-carrying wire segments. The computed and measured results of magnetic induction are in good agreement.