摘要
提出一种新颖的四开关Buck-Boost变换器及其控制策略。该变换器由Buck变换器和Boost变换器级联等效而成,其可以将宽范围的输入电压高效率变换到额定电压附近,这样对后级变换器而言输入就是一个窄范围,从而保证了后级变换器的优化设计;与此同时,四开关Buck-Boost变换器的滤波工作模式还保证了额定输入电压附近效率的最高。实验结果表明:采用文中提出的四开关Buck-Boost变换器作为前级的两级式变换器可以满足未来通信电源模块高效率、高功率密度以及宽输入范围的要求。
A novel Four Switch Buck-Boost converter is proposed in this paper. This converter is a simplified structure from Buck＋Boost, which can convert the wide range input into a narrow one around the nominal input efficiently. Hence the following stage can be easily designed to achieve a high efficiency. And the special control scheme of the four switch Buck-Boost converter enables the highest efficiency around nominal input. The experimental results show that the two-stage converter composed of the Four Switch Buck-Boost converter and a full bridge converter can achieve high efficiency and high power density, which applicable to future communication system.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2008年第21期15-19,共5页
Proceedings of the CSEE
