A novel and low cost design for forward AC/DC converter with harmonic current correction

Abstract

This paper presents a new simple Forward AC/DC converter with harmonic current correction and fast output voltage regulation. In the proposed AC/DC converter, an extra winding wounded in transformer provides two major merits: The function of bulk inductor has been replaced by this extra back-feeding transformer winding in the proposed converter and significant volume and weight In magnetic material can be saved. The voltage across bulk capacitor can be hold under 450v by tuning transformer windings ratio even though the converter operates In wide range Input voltage (90v similar to 265v/ac). This new converter complies with IEC 61000-3-2 under the load range of 200w and It has fast output voltage regulation.