基于STM32开关电源控制策略的研究与实现  

Research and Implementation of Control Strategy of Switching Power Supply Based on STM32

作　　者：张婷[1] 程红丽[2] 王祖良[1] 黄世奇[1] ZHANG Ting1. , CHENG Hongli2, WANG Zuliang1, HUANG Shiqi1(1. Department of Information Engineering, Xijing University, Xi＇an 710123, China ; 2. School of Communication and Information Engineering, Xi＇an University of Science and Technology, Xi ＇an 710054, China)

机构地区：[1]西京学院信息工程学院,西安710123 [2]西安科技大学通信与信息工程学院,西安710054

出　　处：《电子器件》2017年第5期1130-1134,共5页Chinese Journal of Electron Devices

基　　金：西京学院科研基金(XJ160228);西京学院大创项目(127152017057);陕西教育厅自然科学专项研究项目(16JK2238;16JK2241)

摘　　要：为提高开关电源的动态性能,设计一种基于STM32的暂态滞环电流控制方法。通过将采样信息送进具有浮点运算单元(FPU)的STM32处理器,判断其工作模式,即连续导电模式(CCM)或断续导电模式(DCM),求解出对应的滞环电流宽度,并对实时电感电流和阈值电流作比较,从而控制功率管动作。仿真和实验结果均表明,开关电源具有较好的动态性能,动态响应时间达到400μs左右,负载调整率达到0.04%左右,验证了暂态滞环电流控制策略的可行性。In order to improve the dynamic performance of switching power supply,a transient state hysteresis current control strategy based on STM32 is designed. Sampled information are transferred to STM32 processor with floating point unit（ FPU） function,judging the converter working mode to be continuous conduction mode（ CCM） or discontinuous conduction mode（ DCM）,and the corresponding hysteresis current width is calculated. A comparison between real time inductor current and threshold current controls the power tube to action. The results of simulation and experiment show that switching power supply has good dynamic performance. The dynamic response time is400 μs about and the load regulation is about 0.04%. The results verify the transient state hysteresis current control strategy is feasible.

关 键 词：开关电源 滞环电流控制 工作模式 动态性能 

分 类 号：TM46[电气工程—电器]