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首页> 外文期刊>Power Electronics, IET >Active current ripple cancellation in parallel connected buck converter modules
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Active current ripple cancellation in parallel connected buck converter modules

机译：并联连接的降压转换器模块中的有功电流纹波消除

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摘要

Parallel connection of converters has become a popular method of improving efficiency. This study first presents a design technique for a buck converter with two parallelly connected power modules (PMs), where one PM is designed with large current ripple for high efficiency. This study then demonstrates an active current ripple cancellation technique, where the current waveform of the second PM is shaped to be the exact opposite to that in the first PM, to reduce the current ripple as seen by the output capacitor. The factors that affect the overall efficiency in a parallel connected converter and the calculation of the parameters that determine the effectiveness of the ripple cancellation are reported. A prototype parallel converter is designed based on the proposed converter design technique and the current ripple seen by the output capacitor is successfully reduced by 66% with the proposed ripple cancellation technique, under different line and load conditions.
机译：转换器的并联连接已成为提高效率的流行方法。这项研究首先提出了一种具有两个并联电源模块（PM）的降压转换器的设计技术，其中一个PM被设计为具有大电流纹波以提高效率。然后，本研究演示了一种有源电流纹波消除技术，该技术将第二个PM的电流波形成形为与第一个PM的电流波形完全相反，以减少输出电容器看到的电流纹波。报告了影响并联转换器总体效率的因素以及确定纹波消除效果的参数计算。基于提出的转换器设计技术设计了原型并行转换器，并且在不同的线路和负载条件下，通过提出的纹波消除技术，成功地将输出电容器看到的电流纹波降低了66％。

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