一种ZVS正激变换器的实现  

Realization of a ZVS Forward Converter

作　　者：刘海成[1] 师宇杰[1] 

机构地区：[1]信息工程大学信息工程学院,河南郑州450002

出　　处：《信息工程大学学报》2002年第4期25-28,共4页Journal of Information Engineering University

摘　　要：本文给出了一种ZVS正激变换器的实现,该正激变换器采用最常见的控制芯片UC3842,无需复位绕组,只需外加简单的辅助电路,即可实现变压器磁芯的自复位和主开关的ZVS开启和关断,且该ZVS不受输入电压和负载变化的影响。本文对此电路进行了分析,并给出了PSPICE仿真结果和实现电路。A ZVS forward converter is presented. The proposed circuit is able to achieve self reset of the power transformer without the use of the conventional tertiary reset winding.Only an universal controller IC UC3842 and a simple auxiliary circuit is employed, and its main switch can be turned on or off under ZVS independent of line and load condition.A steady state analysis of the circuit is given.A PSPICE simulation is carried out.A realization circuit is presented in lower price.

关 键 词：ZVS正激变换器 UC3842 拓扑结构 辅助电路 自复位 主开关 模块电源 

分 类 号：TN624[电子电信—电路与系统]