Buck型变换器数字PID控制器设计方法研究

Buck型变换器包括Buck变换器及其衍生的全桥变换器。文中以Buck型变换器为控制对象,给出了频域补偿设计中模拟PID控制器的零极点配置原则,实现了其比例、积分、微分系数的整定。在此基础上,运用连续系统离散化方法,最终完成数字PID控制器的参数设计。MATLAB/SIMULINK仿真结果表明,通过上述方法设计实现的数字PID控制器能够满足系统的控制要求,输出响应具有良好的静态与动态特性。

Study on the Design Method of Digital PID Controller for Buck-Mode Converter

Buck-mode converter includes the buck converter and the derived full bridge converter.This paper takes Buck-mode converter as the controlled object,proposes the principles of the zero-pole placement for the analog PID controller in the frequency-domain compensation design and accomplishes the setting of its proportional,integral,differential coefficients.Furthermore,the digital PID controller parameters are finally obtained through the method of discretization for continuous systems.The simulation results of MATLAB/SIMULINK show that the digital PID controller designed by this means is able to satisfy the system control requirements,and the output response has good static and dynamic characteristics.