LAUSR

An improved voltage-mode controller (VMC) for the single-switch conventional quadratic boost converter (CQBC) is presented. It has a structure different from those of the existing voltage-mode controllers in that it avoids the possibility of dividing by zero and finding the square root of a term which could be negative. It also now uses a proportional term with a normalized output voltage error as opposed to just using the normalized output voltage error in the integral term to provide integral action. Using these normalized signals helps to reduce the variations in the control signal, leading to improved performance. A comparative experimental study of the proposed VMC and the state-of-the-art modified current-mode controller is carried out under various operating conditions. The results are presented in the brief.