Structure and DC Superimposition Characteristic of Fe78Si9B13 Amorphous Alloys

The structure and the DC superimposition characteristics of Fe78Si9B13 amorphous alloy were investigated. The influences of the air gap length and permanent magnet of the alloy on its DC superimposition characteristics were analyzed. The amorphous alloy was characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and 3D high depth of field microscope, and the DC superimposition characteristic was analyzed by means of the μ-H curves. The results show that the magnetic permeability and the saturation magnetic field intensity are dependent on the air gap length of the conventional core. The magnetic bias can improve the DC superimposition characteristic of the Fe78Si9B13 amorphous inductor core, and the magnetic permeability of the inductor cores is not adversely affected. By using the magnetic bias method, larger rated current may pass through the inductor core before magnetic saturation occurs, so the inductor cores in size can be reduced effectively