Abstract: With reference to the idea of active disturbance rejection control (ADRC), we observe and compensate the coupling terms and uncertainties such as the external load in the model by the design of an extended state observer. Then we design a control law of the compensated model on the basis of a mathmatical model of a permanent magnet synchronous motor under stator field oriented rotary coordinates. Finally, by modulating the reference voltage from the active disturbance rejection controller with a space vector modulation technique, the expected speed of the motor can be tracked. A simulation model is established in Simulink, and the results show that the proposed scheme shows better dynamic performance, higher stability precision, and stronger anti-disturbance performance compared with the direct torque control scheme of a PID structure.