LCC谐振变换器工作模式的分析与判别

Analysis and identification of LCC resonant converter operating modes

为了分析和判别LCC串并联谐振变换器的工作模式,首先给出了图论分析法的基本原理和步骤,应用该图论法获取了LCC谐振变换器的所有工作路径;然后根据LCC谐振变换器的电路拓扑特点和工作规律,得到有效通路,并根据有效通路得到2种有实用价值的工作模式;最后在此基础上推导了这2种工作模式的发生条件,给出了判别依据。研究过程表明,图论分析法简单易行,是一种可用于多谐振模态下的谐振变换器的分析方法。

In order to analyze and identify the operating modes of LCC series-parallel resonant converter, the theorem and steps of graph theory analysis are introduced and all the operating paths of LCC resonant converter are thus obtained,the valid paths are then derived based on the characteristics of its circuit topology and operating law,and two practical operating modes are finally achieved according to the valid paths. For each mode,the operating condition is derived and its criterion is given. It is demonstrated during the study that,the graph theory analysis can be simply used in the analysis of resonant converter with multiple resonant modes.