摘要
研究了电磁干扰(EMI)滤波器的共模和差模插入损耗(IL),并进行理论分析和测量;分析了影响IL的各种原因及改进方法。最后,测量了EMI滤波器插入损耗,为了检验EMI滤波器对开关电源的电流(电压)谐波的抑制效果,测量了开关电源的电流(电压)谐波分量,列出了测量数据,并对测量结果进行分析,总结出开关电源传导干扰的特点。测量结果验证了理论计算和分析的正确性。
This paper discusses common model Insert Loss (IL) and differential mode IL of electromagnetic interference (EMI) filters of switching mode power supply,and studies theoretical analysis and measure is gained,various reasons of effect IL are analysed and its improvement methods is got. At last,the EMI filters Insert Loss is measured,for examinating the control result of EMI filters to the current (voltage)harmonics of switching power supply, the current (voltage) Harmonics of switching power supply is measured, the measurement data is listed and the measurement results is analysed,the characteristics of switching power supply conduction interference is gained. Measure results have verified that the theoretical calculation and analyses are correct.
出处
《通信电源技术》
2003年第5期17-20,27,共5页
Telecom Power Technology
关键词
EMI滤波器
插入损耗
共模
差模
EMI filters
insert loss
common model
differential mode
