燃料电池应用下的有源箝位正激变换器的研究  

Research on an Active-clamp Forward Converter for Fuel Cell

作　　者：岳改丽[1] 王紫晶 高文杰 YUE Gai-li;WANG Zi-jing;GAO Wen-jie(Xi'an University of Science&Technology,Xi'an 710054,China)

机构地区：[1]西安科技大学,电气与控制工程学院,陕西西安710054

出　　处：《电力电子技术》2023年第3期111-114,共4页Power Electronics

基　　金：国家自然科学基金(51777167)。

摘　　要：为解决燃料电池输出特性偏软,输出电压不稳的问题,研究设计了一种高效、稳定、电气隔离、宽输入范围的有源箝位正激变换器。采用有源箝位技术实现初级主、辅开关管的零电压开关(ZVS)。结合同步整流技术进一步减小输出损耗,为适应宽输入电压范围条件,利用外驱动方式;主控芯片选用UCC2897使电路的控制更加简便,并保证变换器输出稳定。最后,制作了120 W,输入电压36~72 V的实验样机并进行测试分析,通过实验数据验证了理论分析的正确性。To solve the problem of soft output characteristics and unstable output voltage of fuel cell,an active-clamp forward converter with high efficiency,stability,electrical isolation and wide input range is designed.Zero-voltage switching(ZVS)of primary and secondary switches is realized by active clamping technology.Combined with synchronous rectification technology to further reduce the output loss.The external drive mode is used to adapt to wide input voltage range.The UCC2897 is selected to make the control of the circuit easier and to ensure the stability of the converter output.Finally,an experimental prototype with 120 W and input voltage of 36~72 V is tested to verify the correctness of the theoretical analysis.

关 键 词：正激变换器 有源箝位 同步整流技术 

分 类 号：TM46[电气工程—电器]