输入串联输出并联全桥变换器的无电流传感器均压均流控制策略  

Voltage Sharing and Sensor-Less Current Sharing Control Strategy of ISOP Full-Bridge Converter

作　　者：陈杰[1] 刁利军[1] 林文立[1] 全恒立[1] 刘志刚[1] 

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《电工技术学报》2012年第6期126-130,共5页Transactions of China Electrotechnical Society

基　　金："十一五"国家科技支撑计划(2006BAG02B00);"十一五"国家科技支撑计划(2006BAG02B)重点资助项目

摘　　要：输入串联输出并DC-DC换器常用在输入高电压输出大电流场合,但是这种结构存在输入均压与输出均流问题。本文深入分析输出均流的实现条件,指出只要能满足系统稳定,就能实现输出均流。通过建立系统模型,推导出系统的稳定条件,并在此基础上提出了电压前馈控制策略,实现无电流传感器的输入均压与输出均流。最后通过Matlab仿真,并制作了样机,表明此控制策略的正确性。Input-series output-parallel converter is suitable for the high input voltage and output current DC-DC conversion application, but the structure brings the problem about input voltage sharing and output current sharing. The paper analyses the conditions of output current sharing deeply and indicates that the condition is system stability. Subsequently, the condition of system stability derived from small-signal model of the system, and the voltage feed-forward control strategy is proposed. Finally, the paper verifies correctness of the control strategy through Matlab simulation and experiment.

关 键 词：输入均压 输出均流 稳定性 小信号模型 电压前馈 

分 类 号：TM46[电气工程—电器]