摘要
以工作于电感电流连续导电模式(continuous conduction mode,CM)的单电感双输出(single-inductor dual-output,IDO)Buck变换器为研究对象,采用时间平均等效电路方法,给出SIDO CCM Buck变换器的直流电压增益及系统的输出/控制、交叉影响、耦合等传递函数。在此基础上,得到一种分析SIDO CCM Buck变换器交叉影响的功率级小信号模型。论文建立电压控制SIDO CCM Buck变换器的闭环小信号模型,分析变换器两路输出负载变化对两路输出支路的交叉影响。最后,通过仿真和实验结果验证理论分析的正确性。
As the single-inductor dual-output （SIDO） Buck converter in the continuous conduction mode （CCM） for the study, the expressions for DC voltage gains and control to the output transfer function, cross-regulation transfer function and cross-coupled transfer function of the system are derived by the time averaging equivalent circuit approach. Based on this, a power stage small signal model to analyze the cross-regulation of SIDO CCM Buck converters was proposed. With the voltage-feedback controlled SIDO CCM Buck converter as an example, the closed small signal model was established and the cross-regulation was analyzed with changing loads. Finally, the simulation and experiment results show that the theoretical analysis is reliable.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2014年第15期2371-2378,共8页
Proceedings of the CSEE
基金
国家自然科学基金项目(51177140)
国家自然科学基金面上项目(61371033)
中央高校基本科研业务费专项资金资助(2682013ZT20)~~
关键词
连续导电模式
单电感双输出
交叉影响
小信号模型
负载变化
continuous conduction mode （CCM）
single-inductor dual-output （SIDO）
cross-regulation
small signal model
load changed
