改进型ZVT-PWM Buck变换器的仿真分析  

Simulating Analysis of the Improved ZVT-PWM Buck Converter

作　　者：孙慧贤[1] 王群[1] 杨卫新[1] 

机构地区：[1]国防科技大学炮兵学院,湖南长沙410111

出　　处：《电气开关》2004年第6期33-36,共4页Electric Switchgear

摘　　要：针对零电压过渡 PWM Buck电路存在的辅助开关硬关断和内部循环电流的问题 ,提出了一种改进电路 ,分析了其工作过程。并进行了仿真分析 ,结果说明这种改进能够较好地解决原电路存在的问题。Aimed at the problem of the hard switching of auxiliary switch and the internal circulating current in the zero-voltage-transition PWM (ZVT-PWM) converter, an improved circuit for solving the two problems and raising the efficiency of the converter significantly is proposed. Its operation principle is analyzed and simulating analysis is presented. It is proved by simulation that the improved circuit can overcome the former circuit's shortcomings.

关 键 词：PWM BUCK变换器 零电压过渡 BUCK电路 改进电路 仿真分析 辅助开关 关断 改进型 循环 

分 类 号：TM464[电气工程—电器] TN624[电子电信—电路与系统]