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It is necessary to estimate the information of the accurate position and speed for the sensorless control of permanent magnet synchronous linear motor (PMSLM) drive system. This paper presents a novel digital sensorless control algorithm for PMSLM drives based on extended Kalman filter (EKF). The model of the PMSLM control system based on EKF in Simulink simulation environment is developed. The PI...
This paper proposes a method that based on direct thrust control (DTC) to address the disturbance rejection problem in permanent magnet linear synchronous motor (PMLSM). In view of the PMLSM, direct torque control design is suitable for the DTC of linear motor control system. According to the rated load capacity of the motor, we give PMLSM a load disturbance. Then we obtain the motor dynamic characteristics...
Reduction of the spatial harmonics of back electromotive force(EMF) is a useful way to reduce thrust ripple of permanent magnet linear synchronous motor (PMLSM). In this study, a method of v-skewing in the coils is proposed to reduce the harmonics to suppress thrust ripple in the PMLSM. The thrust and the harmonic are generated in a double-sided PMLSM model. The 3-D finite element method (FEM) is...
For dual linear motor cooperative control system, there is only one controlled input signal can be used. Each linear motor of the control system is independent. Therefore, the position loop of control system is easier to be disturbed. This paper presents a 2DOF PID controller to position loop for dual linear motor cooperative control system so that the two groups of parameters can be adjusted independently...
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