Based on the control strategy of permanent magnet synchronous linear motor, this paper uses active disturbance rejection control to control the speed loop of PMLSM.Firstly, the mathematical model of PMLSM is given, and then the speed loop of PMLSM is controlled by ADRC. By comparing with the traditional PI control, the speed tracking ability and anti-disturbance ability of PMLSM are analyzed when the load torque changes and the motor parameters change.The simulation results show that ADRC has faster tracking performance than traditional PI control, solves the contradiction between rapidity and overshoot in PI control, and has strong anti-disturbance ability.

PMLSM，ADRC，PI control，anti-disturbance ability，parameters change