Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Study on Transformer Saturation in Isolated Full-Bridge DC-DC Converters
Authors Jeonghun Kim ; Honnyong Cha
DOI 10.6113/TKPE.2020.25.4.261
Page pp.261-268
ISSN 1229-2214
Keywords Current-fed; DC blocking capacitor; Transformer saturation; Voltage-fed
Abstract Transformer saturation in full bridge (FB) isolated DC-DC converters is caused by uneven switching speeds and voltage drops in semiconductor devices and mismatched gate signals. In order to prevent transformer saturation, most popular and widely used approach is to insert a capacitor in series with the transformer windings. This study conducts extensive analyses on transformer saturation and the effect of DC blocking capacitors when they are placed in the primary or secondary windings of a transformer. The effect of the DC blocking capacitors is verified in voltage-fed and current-fed FB converters.