High performance tiny capacitor development using MATLAB for harmonic elimination in symmetrical full bridge circuit

The harmonic disturbance that is caused by the double line frequency ripple power in the single phase AC/DC or DC/AC system. This issue can be eased through the installation of bulky electrolytic capacitors in the dc-link. Unfortunately, such passive filtering approach may inevitably lead to low power density and limited system lifetime. Symmetrical full-bridge circuit uses dc-link capacitors to absorb the ripple power. In this paper presents a symmetrical full bridge circuit which utilizes the dc link. Capacitors to absorb the ripple power and the additional pair of switches and a small filtering inductor. By implementing four switches, we can reduce the capacitance as 22μf/400volt. Also by the help of PI controller the switching stress reduced with stable DC link voltage. As a result, the objectives of high-efficiency power conversion can be obtained.