一种新型软开关Buck变换器的研究  

Research of a New Type of Soft-switching Buck Converter

作　　者：牛犇[1] 宋书中[1] 马建伟[1] 朱锦洪[2] 

机构地区：[1]河南科技大学电子信息工程学院 [2]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《工矿自动化》2009年第12期38-42,共5页Journal Of Mine Automation

基　　金：河南省科技攻关计划项目(082102210015)

摘　　要：针对传统ZVT-PWM变换器的辅助开关硬关断的不足,提出了一种新型PWM控制的软开关Buck变换器方案,详细介绍了该新型软开关Buck变换器的拓扑结构及工作原理,并给出了具体的设计过程。新型软开关Buck变换器的辅助电路使主开关工作在零电压状态,所有的半导体器件均工作在软开关条件下,从而减小了开关损耗。仿真结果证明了该新型软开关Buck变换器方案的有效性。To solve the shortcomings that auxiliary switch of traditional ZVT-PWM converter is hard power off, the paper proposed a scheme of the new type of soft switching Buck converter with PWM control, introduced topology and working principle of the new type of soft-switching Buck converter in details, and gave concrete designing process. The auxiliary circuit of the Buck converter makes main switch work in zero-voltage state, all semiconductor devices work in condition of soft switching, which decreases losses of the switch. The simulation result proved validity of the scheme of the new type of soft-switching Buck converter.

关 键 词：软开关 BUCK变换器 谐振 零电压转换 ZVT-PWM 

分 类 号：TM564.9[电气工程—电器]