小信号模型Superbuck变换器控制系统的设计

为了进一步减小超级变换器—Superbuck变换器的输出纹波,本文针对Superbuck变换器进行控制系统的设计。根据典型的Superbuck变换器主拓扑结构开环频率特性,设计出一种双闭环控制系统,给出了方案、系统设计图和设计后的系统开环传递函数。本文对设计的控制系统进行了仿真,仿真显示,与国内外设计的Superbuck控制系统相比,系统输出性能得到了提高。

Design of Control System of Superbuck Converter in Small-signal Modeling

In order to reduce the ripple of the output voltage for the Superbuck converter, a control system based on small-signal modeling was proposed. Double closed-loop was used in control system, according to typical open-loop characteristic of the main topology for superbuck converter. Scheme, system diagram and the open-loop transfer function of the designed system was given in this paper. Simulation using Saber and Matlab was shown. The results show that the designed system has better output characteristic than the current designed systems.