摘要
环形电感的不同绕组绕制方式会影响自身的磁场泄漏情况,而磁场泄漏会加剧电磁干扰EMI(electromagnetic interference)滤波器的近场耦合。采用部分元等效电路法分析环形电感的等效径向电流和切向电流产生磁场泄漏的情况发现,由切向电流合成的等效电流环是环形电感轴向磁场泄漏的主要来源。为此,提出一种绕组绕制方法,该方法使用双磁芯夹PCB的方式,使PCB上下面绕组产生反向电流环进行磁场抵消。实验环节中,通过三维有限元仿真表明,所提方案能够在与传统方案电感量基本一致情况下,进一步减少轴向磁场泄漏;通过阻抗测试与EMI滤波器的插入损耗测试,验证了所提方案相比于传统方案能够弱化高频寄生参数对电感阻抗特性的影响,能进一步优化EMI滤波器的高频滤波性能。
Different winding schemes for a toroidal inductor can affect its magnetic field leakage,which will intensify the near-filed coupling of an electromagnetic interference(EMI)filter.First,the effect of equivalent radial current and tangential current on magnetic field leakage was studied by using the partial element equivalent circuit method,and it was found that the equivalent current loop composed of tangential current was the main source of axial magnetic field leakage in the toroidal inductor.Then,a winding scheme was proposed,in which a PCB was sandwiched by two magnetic cores to generate reverse current loops above and below the PCB for magnetic field cancellation.In the experimental link,three-dimensional finite element simulation was conducted to demonstrate that the proposed scheme can further reduce the axial magnetic field leakage while maintaining a similar inductance as the traditional scheme.The impedance and insertion loss tests of the EMI filter were conducted,and it was verified that compared with the traditional scheme,the novel scheme can weaken the influence of high-frequency parasitic parameters on the inductor’s impedance characteristic,thereby further optimizing the high-frequency filtering performance of the EMI filter.
作者
邱智勇
傅恺宁
陈为
QIU Zhiyong;FU Kaining;CHEN Wei(School of Electrical Engineering and Automation,Xiamen University of Technology,Xiamen 361024,China;College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control,Xiamen 361024,China)
出处
《电源学报》
北大核心
2025年第4期360-368,共9页
Journal of Power Supply
基金
国家自然科学基金资助项目(51777036)。
关键词
环形电感
磁场泄漏
电磁干扰滤波器
插入损耗
Toroidal inductor
magnetic field leakage
electromagnetic interference(EMI)filter
insertion loss
作者简介
邱智勇(1998-),男,中国电源学会学生会员,硕士研究生。研究方向:高频磁性元件电磁兼容与诊断。E-mail:2222031390@s.xmut.edu.cn;通信作者:傅恺宁(1993-),男,中国电源学会会员,博士,讲师。研究方向:高频磁性元件电磁兼容与诊断。E-mail:fkn@xmut.edu.cn;陈为(1958-),男,中国电源学会会士,博士,教授。研究方向:电力电子功率变换、高频磁技术、电磁兼容诊断与滤波器、电磁场分析与应用、电磁检测等。E-mail:chw@fzu.edu.cn。
