ZCT推挽正激升压电源的数字控制实现

摘要

Many defects exist in analog controlled system of switching power supply . For instance,the control circuit is complex and hard to change. What’s more ,it is hard to implement complex algorithm. To solve these problems,digital control scheme is the best choice. A digital control system of push-pull forward boost converter based on TMS320F2808 is designed in this paper. At first, some key parameters of main circuit is designed on the basis of analysis of work modes. Then,overall plan of digital control system is designed and programmed. At last,experimental results verify feasibility and excellent performance of this digital controlled system.%开关电源的模拟控制系统存在控制系统复杂，控制电路不易修改，不易实现复杂控制策略等缺陷，要解决这些问题，全数字化控制是最佳方案。设计了一种基于TMS320F2808的ZCT推挽正激升压电源的数字化控制系统。首先，在分析主电路工作模态的基础上对主电路的关键参数进行了设计。其次，设计了数字控制系统总体方案并编写了控制软件。最后，通过实验结果验证了该数字控制系统的可行性和优越性。