基于频域分析的双有源桥串联谐振变换器的设计与闭环控制  

Design of Dual Active Bridge Series Resonant Converter Based on Frequency Domain Analysis and Closed-loop Control

作　　者：赵峰[1] 甘延奇 陈小强[1] 王英 ZHAO Feng;GAN Yanqi;CHEN Xiaoqiang;WANG Ying(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,兰州730070

出　　处：《高电压技术》2022年第11期4557-4567,共11页High Voltage Engineering

基　　金：国家自然科学基金(52067013,51767013);兰州交通大学“天佑创新团队”(TY202010)。

摘　　要：为了扩展双有源桥串联谐振变换器(dual active bridge series resonant converter,DABSRC)的软开关范围,提高变换器的稳定性,提出基于频域分析的变换器设计方法并建立其动态小信号模型。通过频域分析得到DABSRC的工作特性,利用工作特性设计变换器的电压增益、品质因数等参数;并针对实际系统中变换器需要闭环控制的问题建立DABSRC的动态小信号模型,为闭环控制的设计提供依据。通过搭建DABSRC的Matlab模型,验证分析方法及闭环控制的有效性。结果表明:基于频域分析的设计方法可以确保DABSRC在不同工况下实现软开关,同时,闭环控制可以显著提高变换器的稳定性。In order to expand the scope of soft-switching of the dual active bridge series resonant converter(DABSRC),and improve the steady-state performance of DABSRC,the design method of converter according to frequency domain analysis is proposed and the dynamic small signal model of DABSRC is established.Firstly,frequency domain analysis is performed to acquire the operation characteristics of DABSRC.The operation characteristics are utilized to design the voltage gain,quality factor and other parameters of DABSRC.Then,in view of the problem that the converter needs closed-loop control in actual system,the dynamic small signal model of DABSRC is built to provide the basis for the design of closed-loop control.In the end,the Matlab model of DABSRC is set up to prove the effectiveness of analysis method and close-loop control.The results show that the design approach based on frequency domain analysis can ensure the soft switching of DABSRC under different operation conditions,and the steady-state performance of DABSRC can be effectively enhanced by closed-loop control.

关 键 词：DC-DC变换器 串联谐振 频域分析 零电压导通 小信号建模 

分 类 号：TM46[电气工程—电器] TP273[自动化与计算机技术—检测技术与自动化装置]