摘要
首先基于小信号模型理论,建立了降压电路的小信号模型。接着采用自动按比例分流控制在该降压电路占空比D<0.5的情况下进行稳态分析和突变分析,通过电压外环、电流内环的双闭环控制系统,根据反馈信号和电流分配比例对PWM信号进行调整,系统输出电压稳定、电流控制精准。最后通过仿真和试验验证了小信号模型理论的正确性和控制算法的可行性。
Firstly,based on the theory of small signal model,a small signal model of the buck circuit is established.Then the steady state analysis and abrupt change analysis of the buck circuit under duty cycle less than 0.5 are carried out by automatic proportional shunt control.The PWM signal is adjusted according to the feedback signal and the current distribution proportion by the double closed loop control system with outer voltage loop and inner current loop.The system output voltage is stable and the current control is accurate.Finally,the correctness of the small signal model theory and the feasibility of the control algorithm are verified by simulation and experiment.
作者
汪洋
任聪
朱文杰
王天正
付朕
WANG Yang;REN Cong;ZHU Wenjie;WANG Tianzheng;FU Zhen(School of Information and Control Engineering,Qingdao University of Technology,Qingdao 266520,China)
出处
《电工技术》
2020年第1期8-10,共3页
Electric Engineering
基金
青岛理工大学国家级大学生创新创业训练项目(编号201910429051,201910429054)
青岛理工大学大学生科技创新项目“基于人头识别的自习室空位查询与灯光控制系统”“基于BOOST-LLC高效率DC/DC车载电源”
关键词
自动按比例分流控制
降压电路
小信号模型
输出电压稳定
电流控制精准
automatic proportional shunt control
buck circuit
small signal model
stable output voltage
accurate current control
