Optimization of a self-driven current-doubler phase shifted full bridge DC-DC converter with integrated magnetic
Abstract
In this paper, a design approach of a self driven current doubler (CD) phase shiftedfull bridge converter (PSFB) with integrated magnetic (IM) is proposed. In the designprocedure, primary winding of transformer split into two windings and output inductorsare integrated in the power transformer’s core. In addition, self-driver is used to driveparallel connected synchronous rectifier on the secondary side. Self-driving signalsare generated using directly secondary in power transformer. Therefore, power densityof the converter is increased using only one magnetic core. An analytical loss analysisis presented to evaluate optimum design parameters. Operation of proposed designis achieved by a prototype operating at 80kHz and rated 1kW (12V-83A). Finally,the obtained efficiency results are compared to the performance of diode rectifiedcenter tapped (DRCT) conventional PSFB converter and 10% increasing efficiency isachieved with proposed design approach.References
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