基于交错多地层结构的平面磁集成LCL-EMI滤波器设计与实现  

Design and Implementation of Planar Magnetic Integrated LCL-EMI Filter Based on Interleaved Multi-GND-layer Structure

作　　者：叶鑫 陆子健 刘艺涛 YE Xin;LU Zijian;LIU Yitao(College of Mechatronics and Control Engineering,Shenzhen University,Shenzhen 518000,China;Guangdong Key Laboratory of Electromagnetic Control and Intelligent Robots,Shenzhen University,Shenzhen 518000,China)

机构地区：[1]深圳大学机电与控制工程学院,深圳518000 [2]深圳大学广东省电磁控制与智能机器人重点实验室,深圳518000

出　　处：《电源学报》2025年第1期243-250,共8页Journal of Power Supply

基　　金：国家自然科学基金资助项目(52007122)。

摘　　要：谐波和电磁干扰EMI(electromagnetic interference)滤波器是并网逆变器中用于抑制谐波失真和EMI噪声的2个重要输出滤波器。因此,提出1种通过平面磁集成的方法组合谐波和EMI滤波器,实现设备体积和质量的减小。首先,选择合适的磁芯将共模电感和差模电感通过PCB绘制平面线圈的方法集成在同一磁芯上,在PCB板层插入电介质板,合理规划层连接方式集成分立电容,实现EMI滤波器的平面电磁集成;其次,采用对称LCL滤波器拓扑结构,取代传统的磁集成非对称结构,进一步通过设计磁芯中柱的气隙和合理布置平面绕组,将LCL谐波滤波器的电感也集成在同一磁芯单元,形成LCL-EMI型平面磁集成滤波器;最后,通过搭建氮化镓单相逆变器平台,对平面磁集成的LCL-EMI滤波器进行实验分析,验证所提平面磁集成方法的可行性。Harmonic and electromagnetic interference(EMI)filters are two important output filters used to sup-press the harmonic distortion and EMI noise in grid-connected inverters.Harmonic and EMI filters are combined by planar magnetic integration to reduce the volume and weight.Through the selection of an appropriate magnetic core,the common mode and differential mode inductors are integrated into the same core by drawing PCB planar coil.To integrate the discrete capacitors and further realize the planar magnetic integration of EMI filter,the dielectric is inserted into the PCB and the layer connection mode is reasonably planned.A symmetric LCL filter is used to replace the traditional asymmetric structure of magnetic integration.Furthermore,by designing the air gap in the center pillar of the magnetic core and reasonably arranging the planar windings,the inductors of LCL harmonic filter are also integrated into the same magnetic core unit to form an LCL-EMI planar magnetic integrated filter.A gallium nitride single-phase inverter platform was built,and the LCL-EMI filter with planar magnetic integration was experimentally analyzed to verify the feasibility of the planar magnetic integration method.

关 键 词：逆变器 平面磁集成 LCL滤波器 EMI滤波器 

分 类 号：TM464[电气工程—电器]