Improved ADRC-based PMSM control without position sensor
Aiming at the problem of poor coordination and anti-interference ability of the traditional speed loop PI regulator in vector control of permanent magnet synchronous motor,active disturbance rejection control(ADRC)was introduced to replace the speed loop PI regulator,and the sliding mode control was selected to replace the PD control,considering the disadvantage of poor performance of PD control in the linear ADRC;at the same time,model reference adaptive system(MRAS)was adopted to replace the traditional mechanical position sensor to detect the rotor position of the motor,and the improved ADRC control method was proposed.Considering the poor performance of PD control in linear ADRC,the slid-ing mode control was chosen to replace the PD control,and the improved ADRC control method was pro-posed;meanwhile,the model reference adaptive system(MRAS)was adopted to replace the traditional mechanical position sensor to detect the rotor position of the motor,so as to realize the sensorless control of the permanent magnet synchronous motor.By using the improved ADRC combined with MRAS,the motor control system has better dynamic response speed and anti-interference ability.Finally,through the permanent magnet synchronous motor pair-drag experimental platform,the motor was experimented under the two working conditions of constant speed and sudden load change and loaded startup speed change,which verifies effectiveness of the control strategy combining the improved ADRC and MRAS.
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