基于扩展Kalman滤波的Buck变换器电流前馈控制  

Current Feed-forward Control for Buck Converter Based on Extended Kalman Filter

作　　者：李昊 刘海涛 甘韦韦 钟源 丁磊磊 杜超 

机构地区：[1]株洲中车时代电气股份有限公司,湖南株洲412001

出　　处：《控制与信息技术》2018年第1期42-45,共4页CONTROL AND INFORMATION TECHNOLOGY

摘　　要：为提高Buck变换器对负载突变的响应速度,提出一种基于扩展卡尔曼滤波(EKF)的电感电流前馈控制方案。其在Buck变换器状态方程上建立了基于EKF的电感电流预测器,将预测的电感电流对给定电流进行补偿,以改善负载电流变化对输出电压的影响。仿真结果表明:在以50%负载进行突投或突切时,该方法能抑制负载扰动,使输出电压(DC 600 V)的波动控制在±20 V以内。In order to improve the response speed of Buck converter to load mutation, it proposed an inductive current feed-forward control algorithm based on extended Kalman filter （EKF）. Based on Buck converter state equation, an inductor current predictor was established based on EKF and the predicted inductor current was compensated for the given current to improve the effect of load current variation on the output voltage. Simulation results show that the method can restrain the load disturbance and control the output voltage （DC 600 V） fluctuating within ~20 V at the 50% load cast and 50% load remove.

关 键 词：BUCK变换器 扩展卡尔曼滤波 电流预测器 前馈控制 

分 类 号：TM46[电气工程—电器]