Simulation analysis of magnetic field of degaussing coils by COMSOL

摘要

Based on COMSOL software simulation analysis was carried out on the magnetic field for degaussing hard drive. Firstly, the magnetic field intensity of the solenoid coil with finite length is calculated. Then, the three-dimensional numerical solution of the magnetic field intensity of the solenoid coil is obtained by using COMSOL software simulation model. The comparison and analysis prove the consistency of the two. Further simulations show that the effective influencing factors of the demagnetizing magnetic field strength include current density, coil height and form.