一种三电平双管正激软开关变换器研究

Research on the Three-level Double Forward Soft-switching Converter

介绍了一种三电平双管正激软开关变换器(Three-levelDoubleForwardsoft-switchingConverter,TDFC)拓扑结构,在该拓扑结构中,变压器初级采用了两组双管正激电路串联,变压器次级电路并联,从而使变换器同时具有三电平电路和双管正激变换器的优点。软开关技术的应用减少了电磁干扰和功率损耗,提高了变换器的功率密度和转换效率。通过Matlab/Simulink软件对电路进行了仿真,仿真结果证实该电路比双管正激软开关电路优越。最后利用三电平双管正激软开关技术成功研制了120A/28V的开关电源。

This paper illustrates a Three-level Double Forward soft-switching Converter （TDFC）.TDFC is composed of both three-level converter and double forward converters （DFC） whose input ports are connected in series at transformer＇s primary and the outputs are connected in parallel at secondary.Thus TDFC has the advantage of the three- level circuit and DFC.The soft-switching can reduce the EMI and power losses and improve the converter＇s power density and efficiency.This TDFC is simulated by Matlab / Simulink, and simulation results demonstrate the advantage of TDFC.At last,150A/28V switching power supply is manufactured by using TDFC.