具有多级纹波消除的隔离电流倍频器

INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference Pub Date : 2008-10-31 DOI:10.1109/INTLEC.2008.4664107

M. E. Jacobs

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引用次数: 0

摘要

介绍了一种采用倍流器的开关型功率变换器的新型纹波消除结构。隔离倍流整流器拓扑的三个改进产生非常低水平的输出纹波而不影响功率转换效率。一种改进选择电流倍频器磁的匝数比作为标称开关占空比的函数，以消除输出电流不连续。第二步选择磁化电感来产生匹配的磁化电流斜率，从而产生一个输出电流脉冲。第三利用ldquocancellationrdquo残余输出纹波电流通过注入的镜像残余纹波电流输出电容器基于磁学的绕组之间的电压差。通过这些多层纹波抵消，在不影响功率转换效率的情况下产生非常低水平的输出纹波。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Isolated current doubler with multiple levels of ripple cancellation

A new ripple-cancellation structure for a switch-mode power converter using a current doubler is described. Three refinements of an isolated current-doubler rectifier topology produce a very low level of output ripple without compromising power conversion efficiency. One refinement selects the turns ratio of the current doubler magnetics as a function of the nominal switching duty cycle to eliminate output current discontinuities. A second selects the magnetizing inductances to produce matched magnetizing current slopes, which produces a ldquoflatrdquo output current pulse. A third utilizes ldquocancellationrdquo of residual output ripple current by injecting a mirror image of the residual ripple current into the output capacitor based on a voltage difference between windings of the magnetics. With these multiple levels of ripple cancellation, a very low level of output ripple is produced without compromising power conversion efficiency.

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来源期刊

INTELEC 2008 - 2008 IEEE 30th International Telecommunications Energy Conference

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