Boost-Buck型DC/DC变换器的滑模控制

文章基于 Boost- Buck电路 ,采用滑模变结构控制 ,设计了一个 1 .1 k W的升 -降压型 DC/DC变换器。该滑模控制器由两个独立的控制器组成 ,分别控制升压环节、降压环节 ,根据电路状态动态调节 ,互不影响。该控制方案能有效地克服输入电压、负载扰动及参数摄动 ,充分发挥了滑模控制快速响应、鲁棒性强等优点 ,并且实现简单、控制灵活 ,具有很好的实际应用价值。计算机仿真结果证实了理论分析与设计的正确性。

Sliding-mode control of a Boost-Buck type DC/DC converter

This paper presents a robust sliding mode control scheme based on Boost Buck type DC/DC converter. Unlike other sliding mode approaches in which all control objects are achieved by a single switching surface function, the proposed converter employs a robust sliding mode controller in which the regulation of output voltage as well as that of middle capacitor voltage is in terms of its own sliding surface function. The controlled system posseses the features of fast dynamic response, high robustness and insensitivity to input voltage and load disturbances,which is verified by analysis and simulation results.