Optimum design of buck converter controller using LQR approach

In this paper an optimum design is proposed for the buck converter pulse width modulator controller, which formulates the value of PID parameters using Linear Quadratic Regulator (LQR) approach. The uniqueness of this approach is that it gives the values of PID parameters with minimum cost function. Simulation and experimental results show the effectiveness of the method. Load disturbance and line voltage disturbance show the robustness of the proposed techniques.