基于磁路法的分段气隙磁心电感器磁损计算OA

In the design of inductors for switching power supply and transformers,the calculation of magnetic circuit parameters is of significance.Given that it is difficult to accurately calculate the core reluctance and core loss of the center-column segmented air gap,an improved magnetic circuit model of the inductor core is proposed with an EC-type inductor core as an example,which is based on the exact domain solution and conformal transformation.Through theoretical analysis,the analytical expression for the equivalent magnetic reluctance of diffused magnetic flux near the center-column air gap in the magnetic core is derived,and a calculation model of magnetic reluctance for the uneven magnetic flux in the inner angle of the magnetic core is put forward as well.Finally,a 3D model was established in the eddy current field of ANSYS Maxwell simulation software,and physical experiments were also carried out.A comparison of theoretical results with simulation results and experimental data verified the accuracy of the theoretical analysis,providing theoretical guidance and reference for the optimization design and industrial production of various magnetic cores of inductors or transformers used in segmented air gaps in switching power supply.