Calculating method for ultimate demagnetization temperature of loudspeaker magnetic steel

摘要

A calculating method for ultimate demagnetization temperature of loudspeaker magnetic steel includes drawing a 2D or 3D geometric model view of the system; importing the performance parameter of magnetic steel and designing variables to be solved and formulas; establishing a finite element model for the system according to the imported performance parameter of magnetic steel, variables and formulas; solving and conducting a steady-state analysis of the finite element model for a coordinate (Hn, Bn), a loadline slope Pc value and an ultimate demagnetization temperature value of the operation point under 20° C. on BH curve by calculating; obtaining a demagnetization curve view with post-treatment. Thus, a value of loadline slope Pc is obtained, and the ultimate demagnetization temperature of loudspeaker magnetic steel can be obtained importing the variables and formulas into FEA simulation through the temperature coefficient of magnetic steel and by the solution and steady-state analysis using COMSOL Multiphysics software.