改进移相全桥DC/DC变换器的建模研究  

Research on modeling of modified phase-shifted full-bridge DC/DC converters

作　　者：崔超[1] 李红梅[1] 张恒果 曾燊杰 Cui Chao;Li Hongmei;Zhang Hengguo;Zeng Shenjie(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《电子技术应用》2018年第4期146-148,152,共4页Application of Electronic Technique

摘　　要：针对电动汽车车载充电器后级移相全桥DC/DC变换器拓扑所存在的技术不足,论文首先介绍了一种改进的移相全桥变换器拓扑,分析变换器工作于电流断续模式(Discontinuous Current Mode,DCM)的基本原理,研究变换器在2 kW工况下的关键元器件参数设计,再进而提出采用开关元件平均模型法建立工作于DCM的改进移相全桥变换器的理想小信号模型,且应用扫频分析证实改进移相全桥拓扑结构DC/DC变换器建模方法及所建模型的合理性。To overcome the shortcomings of the full-bridge DC/DC converter topology for on-board charger,an improved phase-shifted full-bridge converter topology is suggested,and its working principle is analyzed when it operates in the discontinuous current mode(DCM),the key components parameters design is researched in the condition of 2 kW operating conditions,and then,the switching element average model method is proposed to set up the ideal small-signal model of improved phase-shifted full-bridge converter operating in DCM,moreover,the sweep frequency method is used to validate the rationality of modeling methods and established models.

关 键 词：车载充电器 改进移相全桥DC/DC变换器 小信号模型 开关元件平均模型法 

分 类 号：TU411.01[建筑科学—岩土工程]