摘要
针对燃料电池良好的应用前景和输出特性软的不足,提出了由Boost和推挽正激变换器组成的DC/DC变换器,将燃料电池组输出的二十几伏不稳定直流电压转换成300 V的直流电压供给逆变器。由于推挽正激变换器工作于最大占空比,Boost采用单周期双闭环控制,开关管和输出整流管的电压应力很小,有利于变换器的优化设计。通过对各部分的分析和仿真,验证了控制策略的正确性和可行性。
Considering for the good prospects of fuel cells and it’s soft-output characteristics,a DC/DC converter which consists of Boost converter and push-pull forward converter is proposed.This converter transfers the instability output voltage more than 20 V or so to stability voltage 300 V,which supplies to inverter.As push-pull forward converter works at the maximum duty cycle and Boost converter is controlled by a single-cycle dual-closed-loop controller,the voltage stress on push-pull switching devices and output rectifier are very small,which will help to optimize the design of the converter.The correctness and feasibility are demonstrated by the analysis and simulations of each part.
出处
《电力电子技术》
CSCD
北大核心
2010年第6期67-68,74,共3页
Power Electronics
基金
中央高校基本科研业务费专项资金资助(SWJTU09CX026
SWJTU09ZT13)~~
关键词
变换器
燃料电池
双闭环控制
控制器
converter
fuel cell
double closed-loop control
controller
