基于等价输入干扰改进的无刷直流电机控制器  

Improved BLDCM controller based on equivalent input interference

作　　者：陈露瑶 方明星[1] 孙晴 CHEN Luyao;FANG Mingxing;SUN Qing(College of Physics and Electronic Information,Anhui Normal University,Wuhu 241000,China)

机构地区：[1]安徽师范大学物理与电子信息学院

出　　处：《传感器与微系统》2020年第2期82-84,共3页Transducer and Microsystem Technologies

摘　　要：针对无刷直流电机(BLDCM)存在转矩脉动的问题,设计了一种基于等价输入干扰方法改进的双闭环调速控制器,有效抑制了传统双闭环调速系统存在的启动阶段反电动势(EMF)引起的斜坡脉动,实现了高精度控制。速度环采用积分分离比例-积分-微分(PID)控制器,满足低速、高精度的应用场合的需求,进行12扇区划分方法,消除磁链角判断错误引起的转矩估计误差。设计等价输入干扰估计器补偿双闭环调速系统工程设计忽略和简化造成的系统误差,抑制启动阶段反电动势引起的斜波脉动。通过仿真分析,验证了该方法抑制斜波脉动的能力,稳定运行时转矩波特率降低至4%,实现了高精度控制的要求。Aiming at the torque ripple problem of brushless DC motor(BLDCM),an improved double closed-loop speed controller based on equivalent input disturbance method is designed,which can effectively suppress the slope ripple caused by the back electromotive force(EMF)in the start-up phase of the traditional double closed-loop speed control system and achieve high-precision control.Speed loop adopts integral separation proportional-integral-differential(PID)controller to meet the needs of low-speed and high-precision applications.Twelve sectors are divided to eliminate the torque estimation error caused by misjudgment of flux linkage angle.Equivalent input interference estimator is designed to compensate the system error caused by neglection and simplification in engineering design of double closed-loop speed control system,and to suppress the oblique wave pulse caused by back EMF in start-up stage.The simulation results verify the method can suppress the oblique wave ripple pulse,and the torque Baud rate can be reduced to 4%when the system is running stably,and the requirement of high-precision control is achieved.

关 键 词：无刷直流电机 双闭环调速 等价输入干扰 斜波脉动 

分 类 号：TM359[电气工程—电机]