一种高效无源软开关电源  

A High-Performance Passive Soft Switching Power Supply

作　　者：王震[1] 占江山[1] 罗运成[1] 

机构地区：[1]武汉数字工程研究所,湖北武汉430074

出　　处：《电力电子技术》2006年第1期84-86,共3页Power Electronics

摘　　要：介绍了一种高效无源软开关电源,在电源中无需附加有源辅助开关和谐振网络,利用一种高频磁性元件的矩形B-H特性,简单可靠地实现了电源功率变换的软开关操作,并完成PWM调节。电源中采用高效率的电流驱动式自励逆变器完成DC/AC变换,用于为高频磁放大器提供高频方波源,在对电源的工作原理及设计方法进行系统分析的基础上,对一台多路输出的电源进行了实验研究。高频磁放大器的应用简化了电路结构和软开关形成的机理,并能有效防止多路输出时的交叉干扰,明显地降低因输出整流二极管的反向恢复性能造成的电磁噪声。This paper introduces a high-performance passive soft switching power supply.It is not necessary to add extra active auxiliary switch and syntonic network to the power supply.The rectangular B-H feature of a high-frequency magnetic element is used for simply and reliably implementing the soft switching operation for source power inversion and accomplishing PWM regulation.In the power supply ,the high-efficiency current-driven self-excitation inverter is used for DC/AC transfer in order to provide the high-frequency square wave source for the high-frequency magnetic amplifier.Based on the system analysis of the operational principles and the design methods for the power supply,a multi-output power supply is studied through experiments.The application of the high-frequency amplifier simplifies the circuit structure and the mechanism for forming soft switching,effectively prevents cross interference when multi-output performed,and obviously reduces the noise caused by reserve recovery of the output rectifier diode.

关 键 词：电源 脉宽调制/软开关 无源开关元件 交叉干扰 

分 类 号：TM46[电气工程—电器]