摘要

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.

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