有源箝位Flyback软开关电路及应用  

Design and Application of Active-clamp Flyback Converter with Soft Switching

作　　者：朱伟龙[1] 王毅[1] 刘林[1] 刘金鹏[1] 

机构地区：[1]中国电子科技集团第43研究所,合肥230088

出　　处：《混合微电子技术》2016年第1期31-36,共6页Hybrid Microelectronics Technology

摘　　要：介绍了一种有源箝位Flyback变换器ZVS实现方法，分析了其工作原理，并进行了输出15V／1A的电路试验。该方案不但能实现主辅开关管的ZVS，限制输出整流二极管关断时的di／dt，减小整流二极管的开关损耗，同时也有效地降低了开关管的电压应力。A method for active-clamp flyback converter to achieve zero-voltage-switching（ZVS）is introduced and the operating principle for this active clamp flyback converter is analyzed in the paper. According to theoretical analysis, a 15V/1A output,450 KHz frequency prototype is implemented. This method can achieve ZVS for both the main and auxiliary switch. The ZVS also limits the turn-off di/dt of the output rectifier, reduces the rectifier switching losses, and efficiently decreases the switch voltage stress.

关 键 词：有源箝位 反激变换器 零电压开关 

分 类 号：TN86[电子电信—信息与通信工程]