一种串联超级电容器均压电路  

Voltage equalization circuit for series-connected supercapacitors

作　　者：何圣仲[1] 覃福班 何晓琼[1] 徐英雷[1] 周柬成 HE Sheng-zhong;QIN Fu-ban;HE Xiao-qiong;XU Ying-lei;ZHOU Jian-cheng(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学电气工程学院

出　　处：《电机与控制学报》2019年第11期33-41,共9页Electric Machines and Control

基　　金：国家自然科学基金(61371033);成都市科技惠民技术研发项目(2016-HM01-00139-SF);磁浮技术与磁浮列车教育部重点实验室开放课题基金;四川省科技计划资助(2019YJ0241);四川省科技计划资助(2019JDTD0003)

摘　　要：针对串联超级电容器组在实际使用中出现各单体电压不一致的问题,提出一种结合同步整流反激变换器、隔直电容和全桥整流的电压均衡电路。电压均衡电路从超级电容器组汲取能量并存储于耦合变压器中,再将变压器中存储的能量分配给电压较低的超级电容器,最终使各超级电容器单体电压相等,达到均衡电压的目的。所提的均压电路没有大量的磁性元件或开关管,可实现自动均压功能,电路结构和控制方法简单;主开关器件可实现零电压导通,降低变换器的功率损耗。详细地阐述了电路的工作原理,给出了主要参数设计方法,并采用此电路进行了电压均衡实验,实验结果验证了理论分析的正确性。During the use of a series-connected supercapacitor stack,the voltage between supercapacitors is inconsistent.Therefore,a circuit was presented for equalizing series-connected supercapacitor stack,which combines flyback converter with synchronous rectifier,blocking capacitor and bridge rectifier.The voltage equalization circuit draws energy from the supercapacitor stack and stores it in the coupling transformer,and then distributes the energy stored in the transformer to the supercapacitors with lower voltage,so that the voltages of supercapacitors are the same to achieve the purpose of voltage equalization.The proposed circuit needs less components and switches,and can automatically realize voltage equalization,thus it is not only easy to control but also has a simple topology.Additionally,switches realization of zero voltage switching turn-on to improve the efficiency of the converter.The operating principle of the circuit was described,and important parameters was designed.The voltage equalization experiment was performed using the proposed circuit,and the experimental results verify correctness of the theoretical analysis.

关 键 词：超级电容器 反激变换器 全桥整流 电压均衡 零电压开关 

分 类 号：TM53[电气工程—电器]