双频Buck变换器  

The Buck Converter with Double Frequency

作　　者：杜雄[1] 周雒维[1] 

机构地区：[1]重庆大学电气工程学院,重庆400044

出　　处：《电源世界》2006年第10期1-5,共5页The World of Power Supply

摘　　要：本文提出了一种双频Buck变换器拓扑结构,并对其进行了稳态和动态分析。该结构由两个Buck单元构成,一个工作在高频状态,另一个工作在低频状态,高频单元用于提高系统的动态响应速度和输出精度,低频单元用于输出功率。该双频变换器不仅可以改善系统的响应速度,提高控制精度,降低损耗,而且两个变换器之间也不会产生环流。试验结果证明了该理论的正确性和有效性。A novel topology of Buck converter with double frequency is proposed and analyzed in this paper. The topology is composed of two Buck cells cascaded. One cell works in high frequency and the other one works in low frequency. The Buck converter with double frequency employs the high frequency cell to improve the dynamic and steady response, and the power is processed by the low frequency cell. The analysis results show that not only the response is improved, but also the control precision is enhanced. Furthermore, eireum- fluenee between the two Buck cells is not occurred. The experiment results have demonstrated the correctness of the proposed method and verified the theoretical predictions.

关 键 词：双频 BUCK变换器 动态响应 

分 类 号：TM92[电气工程—电力电子与电力传动]