基于PID算法的Buck型开关电源环路补偿研究  

Research on Buck Switching Power Supply Loop Compensation Based on PID Algorithm

作　　者：胡柏威 龙顺宇 蒋冠东 蔡世通 Hu Baiwei

机构地区：[1]海南热带海洋学院海洋信息工程学院,海南三亚572022

出　　处：《工业控制计算机》2024年第6期152-154,共3页Industrial Control Computer

基　　金：大学生创新创业训练计划项目(202211100005);2021年海南省高等学校教育教学改革研究项目(Hnjg2021-84);2022年教育部产学合作协同育人项目(220503580121139)。

摘　　要：针对传统Buck型开关稳压电源环路补偿设计复杂的问题,提出了一种基于数字PID算法进行环路补偿的控制策略,在对Buck型变换器进行建模分析的基础上,加入数字PID算法进行改进,并对改进前后的系统进行建模分析。仿真结果表明,设计系统的相位裕度为78.5°,穿越频率为56 kHz,相关参数符合预设。在样机测试阶段,设定输出电压为20 V,空载输出纹波为26 m V,负载调整率等指标满足一般需求,相关实验证明了该方法的可行性,可按需应用于Buck型开关稳压电源场景中,以改善环路及输出稳定性。In response to the complex design of loop compensation for traditional Buck type switching regulated power supply,this paper proposes a control strategy based on digital PID algorithm for loop compensation.On the basis of modeling and analyzing the Buck type converter,the digital PID algorithm is added for improvement,and the system before and after the improvement is modeled and analyzed.The simulation results show that the phase margin of the designed system is 78.5°,the crossing frequency is 56 kHz,and the relevant parameters meet the preset requirements.In the prototype testing stage,the output voltage is set to 20 V,the no-load output ripple is 26 mV,and the load adjustment rate and other indicators met general requirements.Relevant experiments have proven the feasibility of this method,which can be applied to Buck type switch regulated power supply scenarios as needed to improve the loop and output stability.

关 键 词：环路补偿 PID算法 BUCK变换器 相位裕度 

分 类 号：TM46[电气工程—电器] TP273[自动化与计算机技术—检测技术与自动化装置]