An analysis of magnetic shielding against DC power lines based on homogenization

Abstract

Purpose

To analyze effectively magnetic shielding effects by shields with fine structure.

Design/methodology/approach

Simplification of the fine structure makes it possible to analyze them efficiently. The authors have introduced a homogenization method to estimate effective permeability of magnetic composite structure for the static field. The homogenization method is applied to the analysis of magnetic shields composed of steel plates and steel rods against DC power lines to test its feasibility.

Findings

The properties of the magnetic shielding are analyzed by using the homogenization method. The errors of the magnetic fields increase in case of very few layers.

Originality/value

The simplification of the magnetic shields with fine structure by using the homogenization method makes it possible to analyze efficiently magnetic shielding effects, although the accuracy becomes worse in case of very few layers.

Citation

Waki, H., Igarashi, H. and Honma, T. (2005), "An analysis of magnetic shielding against DC power lines based on homogenization", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 24 No. 2, pp. 566-580. https://doi.org/10.1108/03321640510586187