一种无电解电容隔离型Cuk逆变器及其功率解耦策略  

A electrolytic-capacitor-free isolated Cuk inverter and its power decoupling strategy

作　　者：谈怡君[1] 易辉[1] TAN Yijun;YI Hui(College of Electrical Science and Control Engineering,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]南京工业大学电气科学与控制工程学院

出　　处：《现代电子技术》2019年第22期53-58,共6页Modern Electronics Technique

基　　金：国家自然科学基金(61503181)~~

摘　　要：基于隔离型Cuk变换器具有电气隔离、结构简单、输入电流连续等优点,提出一种新型隔离型Cuk逆变器及其功率解耦策略。首先给出Cuk逆变器的拓扑结构及控制策略,详细分析了工作原理,该结构不需要中间母线电解电容,减小了变换器的体积,可提高功率密度与可靠性。针对输入直流侧存在二次电流纹波,进一步提出在逆变器输入端并接一个有源功率解耦单元以消除二倍频脉动电流,详细分析解耦单元工作原理、特性、关键参数设计及控制。搭建500 W的实验仿真电路,仿真结果证明了所提逆变器及其控制策略的可行性。A new isolated Cuk inverter and its power decoupling strategy are proposed on the basis of the advantages of electrical isolation,structure simplifying,and input current continuation of the isolated Cuk converter.In this paper,the topo logical structure and control strategy of Cuk inverter are given,and the working principle is analyzed in detail.In this structure,the middle bus electrolytic capacitor is not needed,by which the inverter′s size can be reduced,and power density and reliabili ty can be improved.In allusion to the secondary current ripple existing in the input DC side,a method that an active power de coupling unit is connected in parallel mode at the input end of the inverter is further proposed to eliminate the double frequency ripple current.The operating principle,features,and key parameters′design and control of decoupling unit is analyzed in de tail.A 500 W experiment simulation circuit is built.The simulation results prove the feasibility of the proposed inverter and its control strategy.

关 键 词：Cuk逆变器 功率解耦 工作原理分析 控制策略 参数设计 实验验证 

分 类 号：TN712.3[电子电信—电路与系统] 34[自动化与计算机技术—计算机系统结构] TP301.6[自动化与计算机技术—计算机科学与技术]