飞机直流母线变换器的输入电磁干扰滤波器设计  

Design of input EMI filter for airplane’s DC bus converter

作　　者：薛开昶 陈强 XUE Kaichang;CHEN Qiang(The 0616 Research Institution of Guizhou Aerospace Linquan Motor Co.,Ltd.,Guiyang 550081,China;National Engineering Research Center for Small and Special Precision Motors,Guiyang 550081,China)

机构地区：[1]贵州航天林泉电机有限公司0616研究所,贵阳550081 [2]国家精密微特电机工程技术研究中心,贵阳550081

出　　处：《电波科学学报》2020年第5期708-714,共7页Chinese Journal of Radio Science

基　　金：中央军委装备发展部预研项目(31512040130);空军装备预研项目(303040304)。

摘　　要：针对飞机直流270 V至直流28 V电源变换器的应用需求,分析了电源变换器输入端的传导及辐射电磁干扰源.通过对电源变换器的电磁干扰(electromagnetic interference,EMI)频谱进行分析,确定了滤波器的参数.为了抑制滤波器振荡,提出在差模电感两端并联电阻电感网络的方法,替代使用液态铝电容的传统方法,提升滤波器的可靠性.根据差模电感中电流直流分量远高于交流分量的特点,提出采用扁铜漆包线来实现绕组的方法,使差模电感的体积降低.根据锰锌铁氧体低频磁导率高,镍锌铁氧体高频磁导率稳定的特点,提出双磁芯共模电感的设计方法,实现共模电感宽频率和小体积.实测结果证明输入电磁干扰滤波器可使电源变换器符合GJB 151中CE102要求.To meet the application requirements of the DC 270 V to DC 28 V power supply converter,a design procedure is proposed to suppress electromagnetic interference,caused by conduction and radiation at the input of the power converter.By analyzing the electromagnetic interference spectrum of the power supply converter,the filter parameters are calculated.To suppress filter oscillation,a method through arranging resistance-inductance network in parallel at both ends of the differential mode inductor is proposed,and it replaces the traditional method that adopted liquid aluminum capacitance and makes the reliability of the filter improved.Due to the DC component of current in the differential mode inductor is much higher than the AC component,the enameled flat copper wire is adopted to reel the winding to reduce the volume of differential mode inductance.Based on the characteristics that Mn-Zn ferrite has high magnetic conductivity at low frequency and Ni-Zn ferrite has stable magnetic conductivity at high frequency,the design of using common mode inductor with dual magnetic core is proposed,and it makes the common mode inductor achieve a wider frequency and a smaller volume.Finally,the experimental results verify that the power supply converter adopting the designed input EMI filter can meet the requirements of CE102 in GJB 151.

关 键 词：滤波器 电磁兼容(EMC) 电源变换器 直流母线 

分 类 号：TN713[电子电信—电路与系统]