一种用于可持续能源的隔离型高增益DC-DC变换器  

An Isolated High-gain DC-DC Converter for Sustainable Energy

作　　者：苏诗慧 雷勇[1] 罗茜 苟正峰 李永凯 SU Shihui;LEI Yong;LUO Xi;GOU Zhengfeng;LI Yongkai(College of Electrical Engineering,Sichuan University,Chengdu 610065,Sichuan,China;Luzhou Company,China Tower Co.,Ltd.,Luzhou 610041,Sichuan,China)

机构地区：[1]四川大学电气工程学院,四川成都610065 [2]中国铁塔股份有限公司泸州市分公司,四川泸州610041

出　　处：《电气传动》2021年第18期23-27,共5页Electric Drive

基　　金：四川大学泸州市人民政府战略合作项目(2018CDLZ-28)。

摘　　要：提出了一种应用于可持续新能源系统的新型隔离式单开关高升压DC-DC变换器。该变换器由倍压单元及变压器构成,通过对变压器匝数比的设计可以实现该变换器不同的高升压比功能。同时,变换器采用无源钳位技术,电容和二极管组成的吸收电路使得漏电感中的能量得以抑制并实现再循环,缓解了开关上的电压尖峰。此外,在提出的升压变换器中使用变压器,获得了具有高升压转换的效果。该拓扑可用于多种要求电隔离的场合,安全性较高且减少了输入输出电流的信号干扰。对该变换器的工作原理及工作特性进行了理论公式推导与模态分析,最后通过搭建一台20 V/200 V、功率为160 W的实验样机验证了理论分析的正确性。A new type of isolated single-switch high boost DC-DC converter for sustainable new energy systems was proposed.The converter,composed of a voltage doubler unit and a transformer,could achieve different step-up ratios by the design of the transformer turns ratio.At the same time,based on the passive clamping technology,an absorption circuit composed of a capacitor and a diode enabled the energy in the leakage inductance to be suppressed and recirculated,which alleviated the voltage spikes on the switch.In addition,the use of a transformer in the proposed step-up converter had the effect of achieving a high step-up conversion.The topology can be used in a variety of applications requiring electrical isolation,as it is quite safe and helps reduce signal interference from input and output currents.The working principle and characteristics of the converter were deduced by theoretical formulas and modal analysis.Finally,a 20 V/200 V,160W experimental prototype was built to verify the accuracy of the theoretical analysis.

关 键 词：高增益 倍压单元 DC-DC变换器 低电压应力 变压器 

分 类 号：TM28[一般工业技术—材料科学与工程]