升降压型液压软开关变压器变压性能及参数特性分析

Transformation Performance and Parameter Analysis of Buck-boost Hydraulic Soft-switching Transformer

基于DC/DC开关变换器中的四开关Buck-boost变换器,引入软开关技术比对设计了四高速开关阀式升/降压型液压软开关变压器。根据反向环流型四开关阀控制方法,设计出同时满足4个高速开关阀实现软开启的启闭时序。在保证惯性管长度满足集总参数模型的前提下,通过建立模型分析液压开关变压器升/降压以及软开关技术在开关变压器中的可行性。仿真结果表明:液压软开关技术大幅降低了液压变压器在高速开关阀阀口启闭时的压力突变,提升了开关变压器的转换效率和负载驱动能力。

Based on the four-switch Buck-boost converter in DC/DC switching converter,a four-speed on-off valve type hydraulic soft-switch transformer is designed by introducing soft switch technology comparison.According to the control method of four-switch valve in reverse circulation mode,the opening and closing time sequence satisfying the soft opening of four high-speed on-off valves is designed.On the premise of ensuring that the length of the inertia tube satisfies the lumped parameter model,the feasibility of the hydraulic switching transformer pressure rise,pressure drop and soft switching technology in the switch transformer is analyzed by establishing a model,the result of simulation shows that hydraulic soft switch technology greatly reduces the hydraulic transformer in high speed switch valve mouth opening and closing the pressure mutations,promoting the conversion efficiency of switching transformer and load driving capacity.