Flyback架构的EMI 效果通常是比较差的（特别是在不

连续工作模式下）,以往常经验来看，充电板以及功率

板上的充电部分是整机EMI效果的重要决定因素之一。

因此在此专题里面将以Flyback架构为对象，分析其

Noise源，传播途径，改善方法。拟在不影响电气性能

的前提下，降低成本、提高UPS的EMC性能。-Flyback-based EMI effect is usually relatively poor (especially in non-continuous mode) to the usual experience, the charge sheet and power charging part of the whole board EMI effects one of the important determinants. Therefore, in this subject which will be targeted Flyback architecture, analysis of the Noise source, transmission, improve the method. Does not affect the electrical properties to be in the premise, reduce costs and improve EMC performance of the UPS.