摘要
针对传统交错并联式双向DC/DC变换器在高频大功率工作时,开关管损耗大的问题,设计了一种零电流软开关交错并联式双向DC/DC变换器;通过在开关过程前后引入谐振,实现零电流开通和零电流关断,降低开关损耗;进一步分时段模态分析了Boost/Buck模式下的电路工作机理,并在其基础上提出了一种适用于特定占空比的改进型零电流软开关双向DC/DC变换器。最后,通过仿真对比,验证了所设计零电流软开关变换器能量转换效率得到了提高。
A zero-current soft-switching interleaved parallel bidirectional DC/DC converter is designed for the problem of large loss of switching tube when the traditional interleaved parallel bidirectional DC/DC converter is operated at high frequency and high power. The achieve zero-current turn-on and zero-current turn-off are achieved,and the switching losses are reduced through the introduction of the resonant before and after the switching process. The working mechanism of the circuit in Boost/Buck mode is analyzed by sub-time mode,and an improved zero-current softswitching bidirectional DC/DC converter suitable for a specific duty cycle is proposed. Finally,the simulation results verify that the energy conversion efficiency of the designed zero-current soft-switching converter is improved.
出处
《电测与仪表》
北大核心
2018年第4期118-123,共6页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(51405330)
山西省科技重大专项(MJ2016-01)
