Design of PID controller for boost converter with RHS zero

This paper gives a new solution for controlling boost converter that exhibits inverse response (IR) due to the presence of right hand side (RHS) zero. The RHS Zero /spl eta/ imposes a limit on the attainable closed-loop bandwidth of the controlled converter thereby reducing the controller gain K/sub c/. A comparative study is made by introducing different controller tuning methods such as internal model control (IMC), synthesis, equating coefficient and Ziegler-Nichol´s (Z-N) techniques applicable to voltage control of dc-dc boost converter. The paper also presents closed loop simulation results of the converter for load regulation and line fluctuation. The results reveal that, synthesis method gives superior performance in terms of lowest ISE value.