平均电流型并联Buck变换器的建模及滑模控制  

Modeling and Sliding Mode Control of the Average Current Mode Parallel-Connected Buck Converters

作　　者：陈奇[1] 纪志成[1] 

机构地区：[1]江南大学通信与控制工程学院,江苏无锡214122

出　　处：《江南大学学报（自然科学版）》2009年第5期525-530,共6页Joural of Jiangnan University (Natural Science Edition)　

基　　金：教育部博士点基金项目(200802950004)

摘　　要：根据DC/DC变换的基本原理,在连续导通模式下,依据状态空间法建立了并联Buck变换器的数学模型,在此基础上对变换电路构建了仿真模型。仿真结果与理论分析一致,表明了建模方法的正确性。基于该模型设计了一种并联DC-DC变换电路均流控制器,该控制器使用滑模控制法实现输出电流均流和输出电压调节,仿真结果表明该控制器提高了并联变换器的动态性能,输出电压对负载扰动鲁棒性更强,输出电流均流效果较好。According to the basic principles of the DC/DC converter in the continuous conduction mode, a parallel-connected Buck converters＇simulation model is established based on the state space method. The simulation results are consistent with the theoretical analysis and show the effectiveness of the modeling method. Based on the model, a controller for current distribution in parallel-connected DC-DC converters is presented. It uses a sliding-mode method to achieve both output current equalization and output voltage regulation. The simulation results show that the controller improves the dynamic performance of parallel Buck converter, the output voltage is robust against toad disturbances and the output currents are very well equalized.

关 键 词：并联DC-DC变换器 建模仿真 滑模控制 电流均流 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]