一种并联输入并联输出的宽范围双向隔离DC/DC变换器  

Input-parallel-output-parallel Wide-range Bidirectional Isolated DC/DC Converter

作　　者：姚洪涛 粟梅[2] 但汉兵[2] 熊文静[2] 邬思升 胡子恒 YAO Hongtao;SU Mei;DAN Hanbing;XIONG Wenjing;WU Sisheng;HU Ziheng(Hunan SANY Intelligent Control Equipment Corporation,Changsha 410083,China;School of Automation,Central South University,Changsha 410083,China)

机构地区：[1]湖南三一智能控制设备有限公司,长沙410083 [2]中南大学自动化学院,长沙410083

出　　处：《电源学报》2020年第3期13-21,共9页Journal of Power Supply

基　　金：国家自然科学基金资助项目(61903382)。

摘　　要：目前,DC/DC变换器广泛应用于新能源发电、电动汽车以及锂电池化成分容等领域。针对低压大电流双向功率传输应用场合,提出了一种输入并联输出并联的宽范围双向隔离DC/DC变换器。该变换器由2个相同的两级式DC/DC变换器组成,前级采用高效率LLC谐振变换器作为直流变压器,以实现电气隔离;后级采用交错式Buck/Boost变换器,保证宽范围电压输出和高动态性能。所提变换器能够实现功率的双向传输,且采用了一种功率方向改变时,无需进行功率流向判断与开关逻辑切换的调制策略,简化了系统的控制策略并提高可靠性。设计了1台3 kW的实验装置,实验结果验证了所提变换器及其控制方法的可行性和有效性。At present,DC/DC converters are widely used in the fields of new energy power generation,electric vehicles,as well as lithium batteries.A bidirectional isolated input-parallel-output-parallel DC/DC converter is proposed for the bidirectional power transmission application scenario with low output voltage and high output current,which is composed of two identical two-stage DC/DC converters.A high-efficiency LLC resonant converter is used as a DC transformer at the front stage to achieve electrical isolation while an interleaved Buck/Boost converter is used at the rear stage,thus guaranteeing a wide-range of output voltage and high dynamic performance.The proposed converter can realize bidirectional power transmission.In addition,a modulation strategy is adopted,which does not require the judgment of power flow direction or the changing switch logic when the power flow direction changes.As a result,the control strategy is simplified,and the reliability of the DC/DC converter is improved.A 3 kW experimental device was designed,and experimental results verified the feasibility and effectiveness of the proposed converter and its control method.

关 键 词：DC/DC变换器 电气隔离 双向功率传输 

分 类 号：TM46[电气工程—电器]