中文摘要：

针对燃料电池的实际要求设计并制作了推挽Buck型直流-直流（DC-DC）变换器的硬件电路,包括变换器主电路、控制电路、检测电路及保护电路等;采用状态空间平均法建立推挽Buck型DC-DC变换器的小信号模型,并且进行补偿反馈控制;基于通用反转控制器（GPIC）的现场可编程门阵列（FPGA）模块实现了推挽Buck型DC-DC变换器的数字化控制.结果表明,在FPGA模块的数字化控制下,自主研发设计的DC-DC变换器的输出电压能够很好地跟踪设定电压,具有优异的阶跃响应特性和较强的抗负载及输入扰动能力,能够保证燃料电池DC-DC变换器实现高效、可靠的电能转换.

英文摘要：

A push-pull Buck DC-DC converter topology was proposed.Based on the state-space averaging method,a small-signal model of the converter was established and the compensation feedback controller was designed.First,the hardware of push-pull Buck DC-DC converter was designed according to actual requirement,including detection circuit,driver circuit,etc.Then,the digital controller implemented through the field programmable gate array（FPGA）of general-purpose inverter controller（GPIC）was applied to the self-made push-pull Buck DC-DC converter.Experimental results demonstrate that the actual output voltage is perfectly regulated to its reference value under the FPGA digital control and the converter shows great transient characteristics for step response and anti-input/load disturbance,ensuring efficient and reliable power conversion of the fuel cell DC-DC converter.