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为了进一步减小平面EMI滤波器的体积、缩短制作周期、降低开模成本、提高功率密度及解决复杂模型制作困难等问题,提出一种利用3D打印来实现平面磁集成EMI滤波器的技术。提出了两种不同的磁集成EMI滤波器结构,通过推导出估算电感值简单有效的数学模型,并结合3D有限元仿真和saber仿真方法,证明该结构的正确性和准确性。并且建立简单的仿真电路,对比插入损耗的曲线,证明利用该技术制作的EMI滤波器具有很好的滤波性能。
In order to further reduce the size of planar EMI filter, shorten the production cycle, reduce the cost of mold opening, increase the power density and solve the difficulty of making complex models, a new technology of planar magnetic integrated EMI filter using 3D printing is proposed. Two different EMI integrated EMI filter structures are proposed. The simple and effective mathematical model for estimating the inductance value is deduced. Combined with the 3D finite element simulation and the saber simulation method, the correctness and accuracy of the proposed structure are proved. And the establishment of a simple simulation circuit, compared with the insertion loss curve to prove that the use of EMI filters produced by the technology has good filtering performance.