基于参数预标定的长行程PMLSM无传感器控制

为了解决长行程定子不连续永磁直线同步电机存在的因无法全程安装位置传感器和不同动子和定子之间的电磁参数不固定所造成的控制性能下降的难题,提出一种在每一段定子内先进行参数标定,再进行速度控制的控制系统设计。首先,在动子进入过程中,对电机进行电磁参数标定,根据标定参数对控制器参数进行调整,以达到更好的控制效果。然后,使用无位置传感器控制系统使动子快速达到设定速度值并稳定运行。实验结果表明:动子进入过程参数标定精度分别为0.002Wb和0.000 4H;无位置传感器控制中位置估计精度为0.63mm,速度收敛时间为0.45s,稳态误差为0.02m/s。基本满足永磁直线同步电机用于长行程运输的控制快速性、稳定性等要求。

Sersorless control of long-distance prmanent magnet lnear snchronous mtor based on parameters pre-calibration

Permanent Magnet Linear Synchronous Motors (PMLSMs) with discontinuous stators are used in long-distance transport systems. Control performance degradation of PMLSMs is generally caused by the inability to install position sensors and by the fact that electromagnetic parameters between different movers and stators are not fixed. To solve this problem, a control system was implemented in a section of the stator in this study. First, the electromagnetic parameters of the motor were calibrated during the entry of the mover, and the controller parameters were adjusted based on the calibration parameters to achieve a better control effect. Then, the control system without a position sensor was used to enable the mover to reach a set speed quickly and run stably. Experimental results show that the calibration accuracy of the parameters of the entering process are 0.002 Wb and 0.000 4 H, the position estimation accuracy is 0.63 mm, the speed of the sensorless control can reach the set value within 0.45 s, and the steady state error is 0.02 m/s. The study thus shows that the implemented control system can satisfy the system requirements of high speed and stability.