Research On Constant-Frequency Phase-Shifted LCC-Type Resonant Converter

The paper has given an overall review to. the arising and development of the constant-frequency full-bridge converter and the techniques for single-phase high-frequency link inverters, and the LCC-type full-bridge resonant converter is selected as the object of study, the operation principle and the characteristics of the dc/dc converter and dc/ac converter are systematically analyzed.The designs of power circuits, control circuits, drive circuits and trouble protected circuits of the two converters have been accomplished, corresponding programs are also designed.By means of PSIM and MATLAB simulation tools, optimized parameter curves have been obtained. In the end, close-looped experiments for the dc/dc converter and open-looped experiments for the dc/ac converter are carried out, experimental results not only verify the circuits topologies, the theoretical analysis and the parameters design, but aslo indicate two converters achieve the aims of soft-switching.