Modeling of Non-ideal Buck Converter and Design of Compensation Network

Buck converter is a typical DC/DC converter, and its small signal modeling is an important means to analyze its stability and transient response. Taking into account the influence of the parasitic parameters of the switching devices and power components on the converter, for non-ideal Buck converters, the switching tube is turned on and off in one cycle, and a continuous working mode of AC is established. Effective circuit model; based on the small-signal mathematical model, design the feedback control loop, and based on the simulation control loop amplitude-frequency and phase-frequency characteristics, design the compensation network to improve the stability and transient response of the system, and verified by Saber simulation and experiment platform.