DC/DC变换器平均电流自动均流并联控制的研究

采用三环控制策略,其中电流环为内环,电压环和均流环并行为外环,且反馈量是输出电流与输出电压,可将功率电路视为黑匣子,方便了各模块样机的并联;最后以并联Buck变换器为研究对象,设计了各环补偿网络,且对系统进行了稳定性分析。仿真结果表明,系统的动态响应与稳定性均达到要求,抗干扰能力强,且均流效果良好。

Research on three loop control strategy of paralleled DC/DC converters with current sharing

The thesis contains three loop control strategy with inner current loop,voltage loop and current-sharing loop in parallel as outer loop,feedback volume are output current and output voltage,the power circuits will be viewed as black-boxs.the parallel for each module of prototype will become more convenient.In the last,this thesis verifies the validity of Current sharing method and applied to the parallel-connected Buck converters in Current sharing control circuits,the compensating networks of each loop are designed and given to analyze.The simulation results shows that dynamic response and stability has met to the qualification,and its anti-interference ability is strong,flow equalization effect is favorable yet.