基于无速度传感器直接转矩控制系统研究  

Research on Speed Sensorless Direct Torque Control System

作　　者：孙旭霞[1,2] 孟琳 王凯 刘一栋[1,2] SUN Xu-xia;MENG Lin;WANG Kai;LIU Yi-dong(Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学,自动化与信息工程学院,陕西西安710048 [2]陕西省复杂系统控制与智能信息处理重点实验室,陕西西安710048

出　　处：《电力电子技术》2020年第3期44-47,共4页Power Electronics

基　　金：国家自然科学基金(51607142);陕西省重点产业创新链-工业领域项目(2017ZDCXL-GY-01-01)。

摘　　要：针对永磁同步电机(PMSM)使用机械速度传感器成本较高以及易受外界环境影响的问题,设计了一种基于模型参考自适应法的速度估计器;针对定子电阻易受温度变化影响的问题,采用参考自适应方法在线辨识定子电阻,有效提高了系统的控制精度;针对传统直接转矩控制系统中比例积分(PI)调节器参数鲁棒性较差,无法同时满足快速性与低超调的问题,采用了基于自抗扰控制技术的调节器,其最大的优点在于它不依赖于被控对象并且能实时估计内外扰动总和并对其进行补偿,在一定程度上提高了系统对参数摄动和扰动变化的鲁棒性。实验结果表明,采用该算法后,系统能够准确跟踪PMSM转速并且鲁棒性较强。Permanent magnet synchronous motor(PMSM) using mechanical speed sensor has disadvantages of high cost and vulnerability to external influences.So a speed estimator based on model reference adaptive system has been designed.This method can identify different stator resistance easily affected by temperature on-line.Compared to proportional integral(PI) regulator in traditional direct torque control system,a regulator based on active disturbance rejection control technology has been adopted to achieve fast response and low overshoot at the same time.It does not depend on the controlled object and can estimate and compensate all kinds of disturbances in real time,and is robust to parameter perturbations and disturbance changes.The experimental results show that the algorithm can accurately observe the speed of PMSM,and the system has strong robustness.

关 键 词：永磁同步电机 直接转矩控制 自抗扰控制 

分 类 号：TM351[电气工程—电机]