摘要
多路输出直流-直流变换器广泛地应用于各种电子设备。该文的目的是提供一种所有输出均可精确调节的零电压开通3路输出直流-直流变换器。其中第1路输出和第2路输出分别由2个不对称半桥电路来调节,第3路输出由这2个不对称半桥电路之间的相移来调节。所有的主开关管都可以实现零电压开通,因此该3路输出直流-直流变换器可以以较高的效率工作于较高频率。文中探讨了该3路输出直流-直流变换器的工作过程、零电压开通条件及闭环控制设计。用一台输入电压为400V,输出分别为48V/10A、5V/20A12V/5A的实验样机来验证该零电压开通3路输出直流?直流变换器的优越性,在100kHz工作频率满载输出时转换效率为93.36%。
Multiple output dc-dc converters are widely used in different kinds of electronics appliances. An accurately regulated three output （zero voltage switching,ZVS） on DC-DC converter is presented. The first and the second output are regulated through the duty cycles of two asymmetrical half bridge converters, while the third output is regulated through the phase shift between the two asymmetrical half bridge converters. All the main switches can realize ZVS on. Therefore this converter can work at higher switching frequency with higher efficiency. The operation stages, the ZVS on condition and the close-loop control of the three output DC-DC converter is discussed. A 400 V input, 48 V/10 A, 5 V/20 A, 12 V/5 A outputs prototype is built to verify its advantage, and the efficiency at 100 kHz switching frequency in full load is 93.36%.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2008年第24期13-18,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(50377037)~~
