Magnetic field array optimization and qualification based on demagnetization prediction

Abstract

The pharmaceutical and food industries are facing various problems due to metallic foreign substances, and as a countermeasure, they are removed by a magnetic separator. Rare earth magnets used in the magnetic separator, it is necessary to operate qualification for demagnetization by aging or environment. In this study, we were static magnetic field analysis using the Maxwell equation for the relationship between the desired surface flux density and demagnetized. Calculating a surface flux density and the permeance coefficient of the magnetic array of a plurality of patterns, it issued a proper solution to magnetic separator. As a result, it is possible for operation qualification during operation, thereby ensuring the quality of the product and risk hedge.