一种基于LCC谐振变换器的参数优化设计

A Parameter Optimization Design Method Based on LCC Resonant Converter

针对定频LCC谐振变换器存在滞后桥臂全开关条件容易丢失,重载时谐振电流较大,从而导致只有较窄的ZVS范围以及较大的导通损耗等问题,提出了一种基于LCC谐振变换器的参数优化设计方法,首先对变换器进行时域分析,然后基于基波分析法,使用功率分析与时域分析相结合的方法对LCC谐振变换器进行参数设计,该参数设计方法拓宽了变换器的ZVS导通范围,并有效地降低了谐振电流,减小了环流损耗,最后在Matlab/Simulink仿真环境下搭建了仿真平台,仿真结果验证了理论的正确性。

For a fixed frequency LCC resonant converter have some problems of the full switching state of the lag arm is easily lost and the resonant current is large at heavy loads, resulting in only a narrow ZVS range and large conduction losses. Firstly, perform time domain analysis on the converter. Secondly, parameter design of LCC resonant converter based on fundamental analysis method using power analysis and time domain analysis. The parameter design method broadens the ZVS conduction range of the converter, and effectively reduces the resonant current and reduces the circulating current loss. Finally, a simulation platform is built in the Matlab/Simulink simulation environment. The simulation results verify the correctness of the theory.