UUI与EE型磁芯变压器功耗对比分析

高频电子变压器及电感器是开关电源中的重要组成部分,它的功率损耗约占电源总损耗的30%,因而此部分功率损耗的大幅度降低可以提高开关电源的性能。基于脉冲变压器的原理,就UUI磁芯和传统EE型磁芯中柱开隙磁件的功率损耗进行定性比较分析,结果表明开关电源采用UUI磁芯电子变压器时,变压器本身的功率损耗可以降低20%。

Comparative analysis on the power loss between UUI and EE core transformers

High frequency magnetic units (electronic transformers and inductors) are important components in switching power supply, and it accounts for about a third of power loss in overall power loss. Thus, amount of reduction in magnetic unit power loss can greatly increase the efficiency of switching power supply. Based on theory of pulse transformer, this article compared and analyzed the power loss of UUI and EE magnetic units. The result suggests that the power loss of electronic transformer had a 20% reduction for switching power supply using UUI core transformer.