数字式交流恒流源传导电磁干扰抑制方法  

Method for Suppressing Conducted Electromagnetic Interference in Digital AC Constant Current Sources

作　　者：许谦 赵升[1] 朱翔鸥[1] 谢喜龙 XU Qian;ZHAO Sheng;ZHU Xiang-ou;XIE Xi-long(Wenzhou University,Wenzhou 325035,China)

机构地区：[1]温州大学,电气与电子工程学院,浙江温州325035

出　　处：《电力电子技术》2024年第4期53-56,共4页Power Electronics

基　　金：国家自然科学基金(52077158);温州市重大科研项目(ZG2023049)。

摘　　要：数字式交流恒流源中大量功率开关器件的使用产生了严重的传导电磁干扰(EMI)噪声,为了抑制交流恒流源传导EMI噪声,此处设计了一种基于耦合电感的EMI滤波器。该滤波器由耦合电感模块和差模电容等部分构成,利用耦合电感模块等效出的共模负电容抵消恒流源系统寄生电容,阻断噪声传导路径,抑制交流恒流源输入侧共模噪声,利用等效出的共模正电容与差模电感抑制恒流源输出侧噪声。实验结果表明,该EMI滤波器能显著抑制恒流源输入侧和输出侧的传导EMI噪声,且使用较少的元器件,有效减小了滤波器体积及成本。The use of numerous power switching devices in digital AC constant current sources generates significant conducted electromagnetic interference(EMI)noise.To suppress the conducted EMI noise in AC constant current sources,an EMI filter based on coupled inductors is designed.The filter consists of a coupled inductor module and differential mode capacitors,which utilizes the equivalent common mode negative capacitance generated by the coupled inductor module to cancel the parasitic capacitance in the constant current source system.This effectively blocks the noise conduction path,suppresses the common mode noise on the input side of the AC constant current source,and uses the equivalent common mode positive capacitance and differential mode inductance to suppress the noise on the output side of the constant current source.Experimental results demonstrate that the proposed EMI filter significantly suppresses the conducted EMI noise on both the input and output sides of the constant current source,while utilizing fewer components,effectively reducing the size and cost of the filter.

关 键 词：滤波器 恒流源 电磁干扰噪声 耦合电感 

分 类 号：TN713[电子电信—电路与系统]