一种新型双频Boost变换器

摘要

A novel topolopy of Boost converter with double frequency is proposed. The current flowing of the converter in the high frequency unit is diverted by the low frequency one compared with the traditional high frequency Boost converter. The converter can improve the dynamic response with high efficiency, which is suitable for high power applications.The working principle of double frequency Boost converter is analyzed and the state equation of four swicth state is established.The results proves that the steady and dynamic performance of double frequency Boost converter are same as the high frequency Boost converter, but the efficiecy of it is improved obviously.The experimental results and simulation results verify the correctness of theoretical analysis.%提出一种新型双频Boost变换器拓扑结构.与传统Boost变换器相比.该变换器通过叠加低频Boost单元对高频Boost单元进行分流,在改善动态特性的同时提高效率,适用于大中功率场合.对双频Boost变换器的工作原理进行了分析,建立了4种开关状态的状态方程.结果表明双频Boost变换器的稳态及动态性能与单个高频Boost变换器基本相同,但效率却明显提高,仿真和实验结果验证了理论分析的正确性.