Simulation Study on Model-Free Control Method in DC-DC Converter

Based on the nonlinear characteristics of DC-DC converter, we proposed the method with model free adaptive controller and applied it to the Boost converter. Through Matlab/Simulink simulation platform, we performed the simulation of system starting, load disturbance, input voltage and circuit parameters variations. Simulation and experimental results show that the method with model-free adaptive controller has good control effect in Boost converter. The control effect is superior to the PID control method in some aspects. It has a strong robustness and anti-interference ability. It can solve the problem of bad control effect caused by circuit parameters change and the model mismatch during the applications.