基于变截止频率的梯形离散磁链观测控制系统  

Control system of trapezoidal discrete flux linkage observation based on variable cutoff frequency

作　　者：陈雄 邹积浩 任佳[1] 翁如杰 Chen Xiong;Zou Jihao;Ren Jia;Weng Rujie(School of Mechanical Engineering,Zhejiang Sci-TechUniversity,Hangzhou 310018,China;TECO Group Science-Technology(HangZhou),Co.,Ltd.,Hangzhou 310013,China)

机构地区：[1]浙江理工大学机械与自动控制学院,杭州310018 [2]东元总合科技(杭州)有限公司,杭州310013

出　　处：《电子测量技术》2022年第20期81-87,共7页Electronic Measurement Technology

基　　金：浙江省公益技术研究项目(LGG20F030007)资助。

摘　　要：为了解决直接转矩控制系统中永磁同步电机抗干扰能力差的问题,速度环采用自抗扰控制器取代传统PI控制器,移除自抗扰控制器中的跟踪微分器以提高系统信号的跟踪速率,并且通过引入负载观测器对速度环进行前馈补偿,减少自抗扰控制器的负担;同时考虑到电流采样时零漂产生的干扰,引入二阶高通滤波器对传统电压模型进行滤波操作,采用梯形离散法对二阶高通滤波器进行离散处理,提高观测器的观测精度,并设置滤波器截止频率跟随电角速度变化,提高系统的动态性能。最后仿真结果表明系统输出转速超调小,输出磁链、转矩精度高,具有良好的抗干扰能力。In order to solve the problem of poor anti-interference ability of the permanent magnet synchronization motor in the direct torque control system, the speed loop adopts the active disturbance rejection controller(ADRC) to replace the traditional PI controller, removes the tracking differentiator in the ADRC to improve the system signal tracking rate, and reduces the burden of the ADRC through introducing the load observation to feed-forward compensation on the speed loop. Meanwhile, considering the interference caused by DC offset in current sampling, the traditional voltage model is filtered by a second-order high-pass filter and the second-order high-pass filter is discretely processed by the trapezoidal discretization method, which improves the observation accuracy of the observer. The filter cutoff frequency is set to follow the change of the electrical angular velocity so that the dynamic performance of the system is improved. Finally, simulation results suggest that the system output speed is super-adjustment, the output magnetic chain, high torque accuracy, and good anti-interference ability.

关 键 词：自抗扰控制器 梯形离散法 带通磁链观测器 直接转矩控制 截止频率 

分 类 号：TM341[电气工程—电机]