一种基于纹波特性的新型滞环控制策略  

A Novel Hysteresis Control Strategy Based on Ripple Characteristic

作　　者：赵晋斌[1] 戴剑丰[1] 屈克庆[1] 

机构地区：[1]上海电力学院电气工程学院,上海200090

出　　处：《电工技术学报》2013年第12期231-236,共6页Transactions of China Electrotechnical Society

基　　金：上海市教委科研创新重点项目(13ZZ132);上海市人才发展资金(2012024)资助项目

摘　　要：基于电感纹波电流与输出纹波电压对电容的充放电特性,提出了一种新颖的滞环控制策略。该策略在输出电压单环反馈中导入电感电流信息,将电感电流与输出电压相加作为反馈量,有效改善了电容充放电变化率,其控制电路简单,无需使用误差放大器及其相应的补偿网络。最后以Buck变换器为例,分析了该策略的工作原理,并通过仿真和实验表明了该策略比传统的PWM控制具有更好的鲁棒性和瞬态响应速度。Based on inductor ripple current and output ripple voltage for charging and discharging characteristics of capacitor, a novel hysteresis control strategy is proposed in this paper. The proposed strategy imports inductor current information in single loop feedback of the output voltage, and superimposes the inductor current and output voltage as the amount of feedback to improve the rate of change of capacitor charging and discharging, which is a simple control circuit without error amplifier and corresponding compensation network. Finally, simulation and experimental results verifvenfy that the proposed control strategy has better robustbess and much faster transient response than the conventional PWM control for Buck converter.

关 键 词：BUCK变换器 滞环控制 电感纹波电流 快速瞬态响应 

分 类 号：TM315[电气工程—电机]