一种新型高变换比双向DC-DC变换器  

A NOVEL HIGH CONVERSION RATIO BIDIRECTIONAL DC-DC CONVERTER

作　　者：宋成江 陈凯龙 孙孝峰[1] 朱艳萍[1] 李昕[1] Song Chengjiang, Chen Kailong, Sun Xiaofeng, Zhu Yanping, Li Xin(Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province, School of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China)

机构地区：[1]电力电子节能与传动控制河北省重点实验室(燕山大学电气工程学院)

出　　处：《太阳能学报》2018年第10期2988-2996,共9页Acta Energiae Solaris Sinica

基　　金：国家重点研究发展计划(2016YFB0900300);国家自然科学基金(51677162);河北省自然科学基金(E2017203337;E2016203156)

摘　　要：提出一种新型高变换比双向DC—DC变换器。该变换器具有电压变换比高、低压侧电流纹波小、开关管电压应力小、效率高等优点，特别适合新能源分布式发电并网、燃料电池电动汽车等大变换比应用场合。详细分析该新型高变换比DC—DC变换器正向Boost模式和反向Buck模式的控制策略和工作过程，绘制出主要波形，推导电压变换比和软开关实现条件，并分析谐振电容的选取依据。最后搭建一台500W样机验证了理论分析的正确性。Abstract： A novel bidirectional DC-DC converter with high conversion ratio is proposed, which has high voltage conversion ratio, low current ripple of the low voltage side, the low voltage stress of switching tube, high efficiency and so on. So it is very suitable for the application of new energy distributed grid-connected system, fuel cell electric vehicles and other applications with high conversion ratio. The control strategy and operation process of the forward Boost mode and reverse Buck mode of the novel DC-DC converter with high conversion ratio are analyzed in detail, and the main waveform is drawn, the voltage conversion ratio and soft switch implementation conditions are derived, and the selection basis of the resonant capacitor is also analyzed. Finally, a 500 W prototype converter is built to verify the validity of the theoretical analysis. Keywords： DC-DC converter; high conversion ratio; resonance; high intensity

关 键 词：DC-DC变换器 高变换比 谐振 高效率 

分 类 号：TM46[电气工程—电器]