Noise characteristics of iron-based soft magnetic material reactor

Iron-based soft magnetic composites have the characteristics of high magnetic permeability, high magnetic induction strength and low iron loss. It is of great significance to study the vibration and noise characteristics of this material reactor for the design of vibration and noise reduction. In this paper, based on the finite element simulation model, the vibration and noise distributions of the reactors under normal operating conditions are calculated and analyzed through the magnetic field-structure-acoustic multiphysics coupling. The noise measurement system of the reactor is built, and the noise signals of the silicon steel core, hybrid iron core, and iron-based soft magnet core reactor are measured separately for experimental verification. The results show that the noise of the hybrid iron core and iron-based soft magnetic core reactors is significantly lower than that of silicon steel reactors. The hybrid reactor is least affected by current changes The simulation data shows that the magnetostriction to Maxwell force noise ratio of silicon steel core reactor is 1.15. Magnetostriction occupies the largest proportion. The main reason for the low noise of iron-based soft magnetic core reactor is that the magnetostrictive effect is negligible.