| With the development of information technology, power management for telecom and computer applications become a large market for power supply industries. To meet the performance and reliability requirement, distributed power system (DPS) is widely adopted for telecom and computer systems, because of its modularity, maintainability and high reliability.This thesis discusses some research focus of soft-switching technology and introduces three traditional resonant convert topologies. Based on this, it presents a novel soft-switching LLC series resonant converter used for telecommunication rectifier. In resonant converter all switches are working on the ZVS and the secondary diodes are working on the ZCS.So we can achieve high efficiency.In order to realize soft-switching over the entire operating, magnetizing inductance is utilized to widen input range. Moreover, leakage inductance participates in resonance, we can effectively reduce EMI and seeondary rectifier voltage stress.According to PSPICE simulation and expriment, detailed analysis of the principle of LLC seriesre resonant converter, design equations and design process are presented. There makrable experiment results, obtained from 24V/8A—200KHz prototype, show the best fature of this topology. |
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