AMPLITUDE-FREQUENCY DEPENDENCE RESEARCH FOR PROTECTIVE PROPERTIES OF AMORPHIC ALLOY BASED MAGNETIC SCREENING

Abstract

Modern shielding methods offer using metals most suitable for solving several problems simultaneously: pro-tecting workers and electromagnetic compatibility of technical equipment. Amorphous soft magnetic alloys are considered as metallic materials with such properties. The goal of this work is determining protective properties of an amorphous soft magnetic alloy at various frequency and amplitude characteristics, depending on thickness changes of the material tape magnetic properties of permalloy, depending on various frequencies of the screened field with protective metal material’s various percentages of nickel and different values of thickness. Examined the dependence of magnetically soft amorphous alloys’ screening coefficient to external magnetic field’s induction; the screening coefficients of an amorphous soft magnetic alloy with various percentages of cobalt and different thicknesses to variable amplitude values; the magnetized and initial state (disadvantages and advantages for specific conditions of protective usage considering economic requirements); the magnetically soft amorphous alloy’s magnetic permeability dependences for various values of frequency and amplitude. Objective determining the shielding coefficients of protective amorphous soft magnetic alloys for amplitude-frequency characteristics of the shielded magnetic field; substantiation of effectiveness for using such materials and provision of specific recommendations for protection against electromagnetic fields and radiation for working people and compatibility of electrical and electro-technical equipment. Protective properties of magnetic screens based on amorphous alloys in various amplitude-frequency ranges are developed. Unambiguous rational substantiated recommendations for choosing materials to ensure the most suitable values of screening coefficients in this situation are proposed. It has been proven experimentally that amorphous soft magnetic alloys have favorable shielding coefficients, depending on the shielded field’s frequency, which increases the efficiency for protecting workers against magnetic fields and simplifies, from an economic point of view, the choice of material in a particular production. The results of graphical dependencies provide the opportunity to choose the necessary protective metal material and automate the development of means of optimal shielding from man-made magnetic fields. Series of studies and easily controlling material properties with different contents of metal substance, different thicknesses of material tape, etc. makes it possible to change the general protective properties of such a metal alloy (depending on the tasks in production)