Application of Wide Range Series Resonant DC/DC Converter in DC Buildings
As an effective integration mode of micro energy,DC confluence has been widely used in DC building system and oth-er application scenarios.It is a challenge for DC/DC converter to boost a wide range of low voltage level to the busbar safely,ef-ficiently and compactly.In this paper,the output rectifier unit of series resonant DC/DC converter(SRC)was improved,and a series resonant DC/DC converter with boost rectifier was proposed.Compared with the traditional series resonant DC/DC con-verter,the converter reduces the number of switches,adopts forced semi resonance to improve the efficiency of the converter,and clamps the voltage stress on the resonant capacitor at the output voltage level.Firstly,the topology,working principle and control strategy of the converter were analyzed.Then the relationship between voltage gain and boost duty cycle in different modes was deduced,and its mode switching was analyzed.Finally,based on MATLAB/Simulink simulation,the characteristics of soft switching,low voltage stress and wide voltage regulation range of the converter were verified.
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