Study and analysis on the variety of non ferrous materials for the formation of maximum Eddy current force

Abstract

This project is concerned with the study of eddy current effects for various materials. There are two types of magnets used i.e. magnetic ferrite (ZnFe2O4 ) and Neodymium magnets (NdFeBN42 ), while the materials used are aluminum , copper and magnesium. When current flows along the magnet, eddy current force will be exerted to this material. This force depends on the type of magnet, type of material and the gap between the magnet and the material, and the gap between the two magnets. From the simulation conducted, it is found that at constant magnet to material gap, the eddy current force decreases as the magnet to magnet gap increases. Similarly, at constant magnet to magnet gap, the eddy current force decreases as the magnet to material gap increases. It can be seen that the minimum force was achieved when the magnet to material gap is maximum and the magnet to magnet gap is also maximum. The maximum force was achieved when the magnet to material gap is minimum and the magnet to magnet gap is also minimum. The weakest (minimum) force was between Copper and Neodymium at a magnet to material gap of 20 mm and magnet to magnet gap of 40 mm; the eddy current force was 0.00048 N. The strongest force (maximum) was between Magnesium and Ferrite and 0.42273 N at a magnet to material gap of 3 mm and magnet to magnet gap of 5 mm.