Design and Implementation of a Phase-Shifted Full Bridge Converter Combined with LLC Resonant Topology

• Main Authors: Chung-Hsiahg Chang, 張忠祥
• Other Authors: Sheng-Yuan Ou
• Online Access: http://ndltd.ncl.edu.tw/handle/e83u6u

碩士 === 國立臺北科技大學 === 電力電子產業研發碩士專班 === 103 === The purpose of the thesis is to design a dc to dc power converter system based on digital processor. This work can be used for the various dc source of industrial equipments. The system consists of two power converter topologies and a digital controller. The power converter circuit composed of a phase-shifted full-bridge (PSFB) topology and LLC half-bridge (LLC-HB) topology. The PSFB shares the lagging leg with the LLC-HB and their outputs are paralleled to distribute the current. For power distribution at the rated load, PSFB converter stresses most of the output power while the LLC-HB converter works as an auxiliary power supply that only load a small portion of the total power. The designed and implemented phase-shifted full-bridge combined with LLC resonant topology realizes zero voltage switching (ZVS) to decrease switch loss and increase system efficiency. The design specifications includes single output voltage 12V, output current 40A, DC input voltage 385V, total power 480W.