软开关隔离型升压DC-DC变换器设计与实现  

Design and Implementation of the Soft Switching Isolation Boost DC-DC Converter

作　　者：茹金平[1] 陈得友[2] 

机构地区：[1]郑州财经学院艺术设计系,郑州450044 [2]郑州财经学院计算机系,郑州450044

出　　处：《电子器件》2016年第2期305-311,共7页Chinese Journal of Electron Devices

基　　金：基于C++技术的学校排课系统设计与实现项目(豫教201413658)

摘　　要：为了满足升压型变换器低成本和大功率密度的需求,提出了一种软开关单极隔离型DC-DC变换器。该变换器电路包含一个无损耗缓冲器,通过漏电感固定住开关的电压峰值,从而实现开关的ZVS关断。在失谐状态下,使用Lr-Cr串联谐振电路来实现二极管的ZCS关断。由于磁化电流低,相较于传统的基于反激的变换器,变压器的容量更少。在输出功率250 W和开关频率100 k Hz的条件下进行了实际测试,提出的变换器的最大测量效率为97%。In order to meet the demand of low cost and high power density of the boost converter,a soft switching DC-DC converter with unipolar switching mode is presented. The converter circuit contains a non loss buffer,which is fixed by the leakage inductance of the switch voltage peak,thereby achieving the switch of the ZVS off. In the con-dition of failure,the Lr-Cr series resonant circuit is used to realize the ZCS off of the diode. Due to the low magneti？zation current,the transformer capacity is less than the traditional fly-back converter. Under the condition of the out-put power 250 W and the switching frequency 100 kHz,the maximum efficiency of the converter is 97%.

关 键 词：升压型DC-DC变换器 单极开关 软开关 隔离型 

分 类 号：TM46[电气工程—电器]