改进型单周期控制SIDO-Buck变换器研究  

Study on improved one-cycle control on SIDO-buck converter

作　　者：李良光[1] 郑加[1] 周建[1] 宋中明[1] 徐良成[1] 

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《电子技术应用》2015年第7期129-131,135,共4页Application of Electronic Technique

摘　　要：SIDO-Buck是一种利用单电感实现双路输出的降压型变换器,具有功率元件少、效率高的优点,但各路输出间存在交叉调节和较大电压纹波的问题,使得输出电压不稳定;引入差/共模电压环路后由于电感电流存在不同的模态,导致电流型控制中斜率补偿存在设计难题。研究了另一种无电流环的单周期控制实现SIDO-Buck变换器输出的稳定,建立了单周期控制SIDO-Buck变换器的闭环系统模型。通过仿真及实验验证了单周期控制SIDO-Buck变换器的可行性。SIDO-Buck is a kind of converter using an inductor to achieve dual-output with low power components and high efficiency advantages, but it has a cross between the branches and a big ripple voltage, making the output voltage instability. The different modes and common-mode voltage leads current-control loop compensation slope design problems because of the introduction of the difference between the inductor current. This paper studies another control strategy without current loop to achieve stably single-cycle SIDO-Buck converter output,and establishes system model of single-cycle control SIDO-Buck converter closed-loop. The feasibility of a single-cycle control SIDO-Buck converter of the strategy is verified by simulation and experiment.

关 键 词：便携式电子系统 SIDO-Buck 单周期控制 差/共模电压 

分 类 号：TN86[电子电信—信息与通信工程]