Analysis of Voltage Mode Buck Converter Based on PID Control Characteristic
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DOI: 10.25236/iccpb.2018.011
Author(s)
Xitong Zhu, Fangya Sun, Nuo Zhou, Hongmei Xu
Corresponding Author
Hongmei Xu
Abstract
Aiming at the strongly nonlinear behavior of Buck converter, the state space average method is used to model Buck converter, and the small signal model and open-loop transfer function are obtained. According to the open-loop transfer function, PID controller is designed. For the shortcoming of the traditional PID controller which cannot change the control parameters dynamically according to the change of the system’s operating point, the fuzzy algorithm is introduced into the PID controller. To model PID controller and fuzzy PID controller, MATLAB/Simulink is used. It can be shown from simulation results that fuzzy PID control has better dynamic control performance and can be used in other converters.
Keywords
Buck converter,State space average method,PID controller,Fuzzy algorithm