具有低电压应力的单开关、高升压比DC-DC变换器  

Single-Switch,High-Boost-Ratio DC-DC Converter with Low Voltage Stress

作　　者：赵修旻 余江涛 蒋婧婧 李楠 ZHAO Xiumin;YU Jiangtao;JIANG Jingjing;LI Nan(State Grid Shanghai Information&Communication Company,Shanghai 200072,China)

机构地区：[1]国网上海市电力公司信息通信公司,上海200072

出　　处：《电子器件》2023年第1期126-132,共7页Chinese Journal of Electron Devices

摘　　要：提出一种适用于可再生能源应用场景的单开关、高升压、非隔离式DC-DC变换器。所提变换器由耦合电感、无源钳位电路、开关电容和升压电路组成。无源钳位电路可回收耦合电感的漏感能量,并限制开关管上的电压尖峰。此外,无源钳位和开关电容电路的有效整合增加了电压增益。简言之,宽连续导通模式(CCM)工作范围、耦合电感的低匝数比、开关上的低电压应力、近似零电流开关(ZCS)、二极管上的低电压应力、漏电感能量回收、和低占空比下的高电压增益是该变换器的优点。讨论和分析了变换器在连续导通模式(CCM)和非连续导通模式(DCM)下的稳态运行。最后,搭建了200 W的实验样机来验证所提变换器理论分析的正确性和可行性。A single switch,high voltage boost,non isolated DC-DC converter for renewable energy applications is introduced.The proposed converter consists of a coupling inductor,a passive clamp circuit,a switched capacitor and a boost circuit.The passive clamp circuit can recover the leakage energy of the coupling inductor and limit the voltage spike on the switch.In addition,the effective integration of pas-sive clamp and switched capacitor circuit increases the voltage gain.In short,wide CCM operating range,low turn ratio of coupling induc-tor,low voltage stress on switch,near zero current switch(ZCS),low voltage stress on diode,energy recovery of leakage inductor,and high voltage gain at low duty cycle are the advantages of the converter.The steady-state operation of the converter in CCM and DCM is dis-cussed and analyzed.Finally,a 200 W prototype is built to verify the correctness and feasibility of the theoretical analysis.

关 键 词：耦合电感 高电压增益 单开关 开关电容 

分 类 号：TM464[电气工程—电器]