Affiliation of Author(s):自动化学院
Journal:IEEE Energy Convers. Congr. Expo., ECCE
Abstract:A dual-transformer-based LLC resonant converter with phase-shift control is investigated for holdup time compensation applications. High efficiency at normal input voltage can be achieved by operating the converter at the series resonant frequency of the resonant tank. The equivalent turns ratio of the two transformers can be regulated dynamically by adopting a semi-active rectifier and phase-shift control. Therefore, voltage step-up with regulated output is achieved during the hold-up time. The current and thermal stresses of both transformers and devices in the rectifiers are reduced with the dual-transformer structure. A major advantage of the presented solutions is that the conversion efficiency at normal input voltage is not affected by the requirement of hold-up time. Operation principles and characteristics of this converter are analyzed in detail. Experimental results are provided to evaluate the effectiveness of the presented solutions. © 2018 IEEE.
Translation or Not:no
Date of Publication:2018-12-03
Co-author:Yu, Zhiyuan,Hua, Wenmin,Zhu, Jianxin,xy
Correspondence Author:Fred Wu
Date of Publication:2018-12-03