摘要
从分布电容的角度出发,分析变压器及散热片产生EMI的方式及其特征,建立了开关电源共模传导发射的分析模型,并据此提出了降低反激式开关电源EMI共模发射源水平的解决方案及设计方法,通过实验验证了各设计方法的有效性。
Based on the stray capacitances of transformer and heat-sink, analysis on the means and the features on generation of EMI by transformer and heat-sink is made, and analytical model of common mode conducted EMI emission in switch mode power supply is built; and based on this some solutions and design methods are proposed to reduce the level of common mode conducted EMI emission source in revers-stimulation type switch mode power supply, the effectiveness of each design method is verified by experiment.
