一种新型软开关DC-DCPWM升压变换器设计  

The Design of a New Soft Switching DC-DC PWM Converter

作　　者：徐进[1,2] 帅立国[2] 

机构地区：[1]苏州经贸职业技术学院SOC研发中心,江苏苏州215009 [2]东南大学机械工程学院,南京210096

出　　处：《电子器件》2016年第2期312-319,共8页Chinese Journal of Electron Devices

基　　金：国家自然科学基金项目(61175069);江苏省高等职业院校国内高级访问学者计划项目(2014FX120);苏州经贸职业技术学院自然类基金项目(KY-ZR1406)

摘　　要：为提高转换效率并降低电源开关的电流应力,提出一种基于新型有源缓冲电路的PWM DC-DC升压变换器。该有源缓冲电路使用ZVT-ZCT软开关技术,分别提供了总开关ZVT开启及ZCT闭合、辅助开关ZCS开启及ZCT闭合。消除了总开关额外的电流及电压应力,消除了辅助开关电压应力,且有源缓冲电路的耦合电感降低了电流应力。另外,通过连续将二极管添加到辅助开关电路,防止来自共振电路的输入电流应力进入总开关。实验结果表明,相比传统的PWM变换器,新的DCDC PWM升压变换器在满负荷时电流应力降低且总体效率能达到98.7%。In order to improve the conversion efficiency and reduce the current stress of power switch,based on a new active snubber circuit a PWM DC-DC converter is put forward. The active buffer circuits using ZVT-ZCT soft switching technology,provides the main switch in the states of open ZVT and close ZCT,auxiliary switch open ZCS and close ZCT. To eliminate the total additional switch voltage and current stress,the auxiliary switch voltage stress are eliminated and active buffer circuits of the coupled inductor is reduced. In addition,through the continuous di-ode added to the auxiliary switch circuit the current stress can be reduced and the stress to the main switch can be prevented from the input current of the resonant circuit. Experimental results show that compared to the traditional PWM converters,the current stress of the new PWM DC-DC boost converter in full load is reduced and the overall efficiency can reach 98.7%.

关 键 词：有源缓冲电路 DC/DC转换器 零电压转换(ZVT) 零电流转换(ZCT) 

分 类 号：TM76[电气工程—电力系统及自动化] TP27[自动化与计算机技术—检测技术与自动化装置]