Analysis of magnetic shielding problems using finite elements

Abstract

The academic problem described in this paper concerns an electromagnetic structure used to prevent the penetration of externally produced magnetic fields in a given region of space. The region to be protected consists of a channel of square geometry situated in the air-filled space that separates the pole pieces of a magnetized M-19 steel structure. The external fields are created by an electric current of 10 kA. The proposed shieldings for time-varying fields employ Copper plates in both, closed and semi-open configurations. To prevent the penetration of static fields, the proposed configuration employs a closed path of highly permeable alloys. The final configuration combines conductive media and highly permeable alloys, and protects the region against static and time-varying fields.

Ga-based active loop optimization for magnetic field mitigation of MV/LV substations

“…acero) y/o conductores (v.g. aluminio) [6][7][8], siendo esta última la más empleada en CT [9,10]. En concreto, suelen instalarse tanto en el interior del CT (apantallado de la fuente de CM) como en torno al volumen que se quiere proteger (apantallado del sujeto).…”