一种软开关双主单辅有源钳位不对称双管正激变流器  

A ZVS Active Clamped Asymmetrical Dual Switch Forward DC/DC Converter

作　　者：陈威[1] 洪小圆[1] 吕征宇[1] 

机构地区：[1]浙江大学电气工程学院,杭州310027

出　　处：《电工技术学报》2009年第3期132-138,170,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(50677063ZD)

摘　　要：有源钳位不对称双管正激变流器因适用于高电压宽范围输入场合而适合作为电力电子系统集成中小功率DC/DC标准模块的候选拓扑。为了进一步提高该变流器的转换效率并降低成本,以满足大规模工业化生产的实际需要,提出了一种改进型的新颖有源钳位不对称双管正激变流器。和原者相比,改进型变流器除了能保持占空比可扩展至50%以上及在各种情况下均能实现软开关的优点外,仅采用一只辅助开关管对变压器进行复位,从而提高了转换效率并简化了拓扑构造。详细描述了该新颖变流器的工作原理和参数设计,在一台输入范围为200～400V、输出54V/5A、适用于通信电源系统、最高转换效率达97%的样机上验证了该变流器的有效性和实用性。Active clamped asymmetrical dual switch forward （ACADSF） converter is a preferable candidate standard DC/DC module for high line and wide range input application in low to medium power rating systems. To make the ACADSF be more suitable for practical applications, a novel ACADSF converter is proposed, which, compared with original ACADSF, maintains the advantages that duty cycle can be more than 50% and ZVS transition for all switches under all conditions, while only one auxiliary switch is needed to reset transformer and which improves efficiency and simplifies circuit configuration as well. Therefore, the proposed topology has more strong capability than the original type for high line and wide range input practical industrial applications where high efficiency requirement is tense. The detail operation principles, as well as the design considerations, are presented A prototype aiming at telecom system of 200-400V input, 54V output, whose highest conversion efficiency is 97%, is built to verify the validity and applicability of this topology.

关 键 词：有源钳位 正激交流器 系统集成 电力电子 

分 类 号：TM46[电气工程—电器] TM13