基于Cockcroft-Walton倍压网络的隔离型高升压比DC-DC变换器  

Isolated DC-DC Converter with High Step-up Ratio Based on Cockcroft-Walton Voltage Multiplier Network

作　　者：包鹏 刘雪山 多佳琦 张荣飞 王春涛 BAO Peng;LIU Xueshan;DUO Jiaqi;ZHANG Rongfei;WANG Chuntao(College of Electrical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学电气工程学院,成都610065

出　　处：《电源学报》2024年第2期27-35,共9页Journal of Power Supply

基　　金：国家自然科学基金资助项目(62371320)。

摘　　要：传统Boost变换器由于受到占空比的约束,一定程度上限制了其在高电压增益电源上的应用。本文基于隔离型升压变换器和Cockcroft-Walton电压倍增单元研究了一种具有高电压增益的DC-DC变换器,并分析了其工作原理及特性。该变换器通过整合隔离型升压变换器与电压倍增单元实现了超高升压比转换,与传统Boost变换器相比,该拓扑具有以下优点:①在较低占空比下实现了高电压增益;②较低的有源开关器件电压应力;③单开关结构简化了控制电路。最后,搭建了一台效率可达89.5%的35 W样机,实现了24 V到1 000 V的高升压比转换,并利用样机对理论分析结果进行了验证。Due to the duty cycle constraint on the traditional Boost converter,its applications to high-voltage-gain power supply are limited to certain degree.In this paper,a DC-DC converter with high voltage gain based on an isolated Boost converter and Cockcroft-Walton voltage multiplier cell(VMC)is studied,and its working principle and characteristics are analyzed.This converter achieves a conversion with an ultra-high step-up ratio by integrating the isolated Boost converter with the VMC.Compared with the traditional Boost converter,this topology has a high voltage gain in a low duty cycle,a low voltage stress of active switching device,and a simple control circuit with one single switch.Finally,a 35 W prototype with an efficiency of 89.5%was built to achieve a high step-up conversion from 24 V to 1000 V,and the theoretical analysis results was verified by experimental results.

关 键 词：DC-DC变换 高电压增益 Cockcroft-Walton电压倍增单元 升压变换器 单开关 

分 类 号：TM46[电气工程—电器]