Boost型PFC共模干扰研究

本文对各种BOOST型功率因数校正(PFC)电路的共模干扰性能进行了分析与对比。在此基础上进行了共模干扰测试实验。分析与实验结果表明普通无桥PFC共模干扰最大,交错式PFC的共模干扰在占空比不为50%时共模干扰要比传统PFC大。

This paper analyzes and compares the characteristic of several common used Boost type PFC on common mode conducted interference. On the base of the analyzing and comparing, the EMC test were carried out on these PFC topologies. And the result of experiments and ana lyzing reveal that conventional bridgeless PFC has the worst performance on common mode conducted EMI emission, and when the duty cycle is insufficient to fifty percent, the common mode conducted EMI emission of interleaved PFC is larger than traditional boost PFC