霍尔传感器故障下的永磁无刷电机容错控制及其动态性能研究

发布时间：2018-03-28 11:04

本文选题：永磁无刷电机　切入点：容错控制　出处：《中国电机工程学报》2017年12期

【摘要】：该文针对霍尔位置传感器的故障,提出永磁无刷电机的容错控制方法,并研究了容错控制系统在动态过程中的性能。首先,分析霍尔传感器的故障情况,定义故障类型。分析各种故障对霍尔信号中的角度间隔和时间间隔的影响,提出针对霍尔故障的转子角度外插估计法。为减小角度预估的滞后,将外插估计法和电机的机械动态模型结合,提出能够克服霍尔故障的闭环角度观测器,以电磁转矩作为前馈信号,提高观测器的动态反应速度。为了完全消除估计角度的滞后现象,将霍尔信号变换为霍尔矢量,并对霍尔矢量进行了频谱分析和谐波消去,在此基础上提出了具有容错功能的霍尔矢量跟踪观测器。最后,通过仿真和实验验证了三种容错控制方法。实验结果表明,三种容错控制方法都能在故障情况下完成转子角度的估计,实现驱动系统的容错控制,而且霍尔矢量跟踪观测器有效地改善了容错控制系统的动态性能。
[Abstract]:In this paper, a fault tolerant control method for permanent magnet brushless motor is proposed for the failure of Hall position sensor, and the performance of fault tolerant control system in dynamic process is studied. Firstly, the fault of Hall sensor is analyzed. The influence of various faults on angular interval and time interval in Hall signal is analyzed. A rotor angle extrapolation estimation method for Hall fault is proposed to reduce the lag of angle estimation. By combining the extrapolation estimation method with the mechanical dynamic model of the motor, a closed-loop angle observer which can overcome the Hall fault is proposed. The electromagnetic torque is used as the feedforward signal. In order to eliminate the lag phenomenon of estimating angle completely, Hall signal is transformed into Hall vector, and the spectrum analysis and harmonic elimination of Hall vector are carried out. Finally, three kinds of fault-tolerant control methods are verified by simulation and experiment. The experimental results show that, All of the three fault tolerant control methods can estimate the rotor angle and realize the fault tolerant control of the drive system. The Hall vector tracking observer can improve the dynamic performance of the fault tolerant control system effectively.
【作者单位】：西北工业大学自动化学院;
【基金】：陕西省科技统筹创新工程计划项目(2016KTCQ01-49)~~
【分类号】：TM351

【相似文献】