电测与仪表2017，Vol.54Issue(16)：123-128,6.
电动汽车中新型双向DC/DC变换器建模分析
Modeling analysis of a novel bidirectional DC /DC converter in electric vehicle
摘要
Abstract
Non-isolated bidirectional DC/DC converter is wildly used in hybrid DC power supply system.Based on supercapacitor-battery hybrid energy storage system, a small single mode of a novel interleaved parallel bidirectional DC/DC converter operating in Boost mode is built by using state-space averaging approach, and an AC small-signal state equation and an equivalent circuit under the phase inductance current continuous mode (CCM mode) are obtained.The open-loop transfer functions of the circuit are presented.The result shows that the slope of low frequency band is 0 dB/dec and has error of stability;the crossing frequency of intermediate frequency band is to high that leads to the big overtop;the slope of high frequency band is-20 dB/dec, and the robustness against disturbance is poor.Based on the result, the feedback loop compensation design is given to optimize design of the controller, thus improving system stability and dynamic response speed.Finally, the model is built using Matlab.The simulation analysis shows that the output voltage can stabilize in 10ms and the fluctuation is under 1.5％ when input voltage with load changes, which meets the requirement of energy storage of electric vehicle power system.关键词
新型双向DC/DC变换器/电动汽车/小信号建模/动态特性Key words
novel bidirectional DC /DC converter/electric vehicle/small-signal modeling/dynamic characteristics分类
信息技术与安全科学引用本文复制引用
陈显东,曹太强,黎凡森..电动汽车中新型双向DC/DC变换器建模分析[J].电测与仪表,2017,54(16):123-128,6.基金项目
四川省电力电子节能技术与装备重点实验室项目(szjj2015-066) （szjj2015-066）
大型高精度超大扭矩分度回转装置设计理论及误差检测补偿技术研究(17YYJC0376) （17YYJC0376）
流体及动力机械教育部重点实验室研究基金(西华大学) （西华大学）
