Boost DC-DC变换器电流滞环暂态控制策略的设计  

Design of Current Hysteresis Transient Control Strategy for Boost DC-DC Converter

作　　者：程红丽[1] 薛涛 贾龙飞[1] CHENG Hongli;XUE Tao;JIA Longfei(Communication and Information Engineering College,Xi’an University of Science and Technology,Xi’an 710054)

机构地区：[1]西安科技大学通信与信息工程学院,西安710054

出　　处：《电子器件》2020年第2期291-296,共6页Chinese Journal of Electron Devices

基　　金：国家自然科学基金项目(51277149)。

摘　　要：对数字电流滞环控制Boost DC-DC变换器进行了详细的仿真实验分析,发现暂态过程中存在恢复时间过长和无法完全恢复到目标输出值的问题。针对这一问题,在原有的电流滞环控制策略的基础上提出了一种改进的电流滞环控制方法。具体控制方法是程序自动判断负载电流是否发生突变,以及突变的类型是电流突增或突降。若突增则启动电流突增暂态控制策略,若突降则启动电流突降暂态控制策略,若没有发生突变,则沿用电流滞环稳态控制策略。完成了改进的电流滞环控制方法的详细设计,并进行了仿真和硬件测试。测试结果表明,改进后的控制策略在保持良好的稳态特性基础上明显改善了变换器的暂态特性。与原有的控制策略相比,有效缩短了暂态恢复时间并提高了负载调整率。After the detailed simulation analysis of the digital current hysteresis control Boost DC-DC converter,there is a problem that the recovery time is too long and the target output value cannot be completely restored in the transient process. Aiming at this problem,an improved current hysteresis control method is proposed on the basis of the current hysteresis control strategy. The specific control method is that the program can automatically determine whether the load current is sudden change,and the type of the mutation is a current spike or a sudden drop. If the load current suddenly increases,the current surge transient control strategy is used;if the load current suddenly drops,the current dip transient control strategy is used;if there is no sudden change,the current hysteresis steady state control strategy is followed. The detailed design of the improved current hysteresis control method is completed,and simulation and hardware testing are performed. The test results show that the improved control strategy significantly improves the transient characteristics of the converter which is on the basis of maintaining good steady-state characteristics. Compared with the original control strategy,the transient recovery time is effectively shortened and the load adjustment rate has been improved.

关 键 词：BOOST DC-DC变换器 电流滞环控制 动态响应 暂态控制 

分 类 号：TM46[电气工程—电器]