基于EMI滤波的通信高频开关电源电磁干扰抑制方法  

Electromagnetic Interference Suppression Method of Communication High Frequency Switching Power Supply Based on EMI Filter

作　　者：周洪海 张鲁峰 ZHOU Honghai;ZHANG Lufeng(Shandong Guowei Electric Power Engineering Co.,Ltd.,Liaocheng 252000,China)

机构地区：[1]山东国为电力工程有限公司,山东聊城252000

出　　处：《通信电源技术》2023年第6期19-21,共3页Telecom Power Technology

摘　　要：在实施通信高频开关电源电磁干扰抑制的过程中,电磁抑制效果不佳,为此提出一种新的基于电磁干扰(Electromagnetic Interference,EMI)滤波的通信高频开关电源电磁干扰抑制方法。引入EMI滤波,设计了共模EMI滤波器,将其接入通信高频开关电源,根据接入后简化的单相等效电路,设计通信高频开关电源电磁干扰抑制算法,并且设置饱和约束条件和漏电流约束条件,实现通信高频开关电源电磁干扰抑制。设计对比分析实验,实验测试结果表明,设计方法对于不同频率下的电磁干扰抑制效果均达到了CISPR国际电磁兼容标准,表现出了良好的实际应用价值。In the process of electromagnetic interference suppression of communication high frequency switching power supply,the effect of electromagnetic interference suppression is not good,so a new method based on Electromagnetic Interference(EMI)filtering is proposed.By introducing EMI filter,a common-mode EMI filter is designed,which is connected to the communication high-frequency switching power supply.According to the simplified single-phase equivalent circuit after access,the electromagnetic interference suppression algorithm of the communication high-frequency switching power supply is designed,and the saturation constraint conditions and leakage current constraint conditions are set to achieve the electromagnetic interference suppression of the communication high-frequency switching power supply.A comparative analysis experiment is designed,and the test results show that the design method meets the CISPR international electromagnetic compatibility standard for electromagnetic interference suppression under different frequencies,showing good practical application value.

关 键 词：电磁干扰(EMI) 共模EMI滤波器 饱和约束 漏电流约束 

分 类 号：TN713[电子电信—电路与系统] TN86