基于参数预标定的长行程PMLSM无传感器控制

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.