Based on ADRC control of brushless DC motor commutation torque ripple inhibition

WANG Liang, MA Lixin, YANG Wei

(School of OpticalElectrical and Computer Engineering, University of Shanghai for
Science and Technology, Shanghai 200093, China)

Abstract: Aiming at the problem of brushless DC motor producing torque ripple in motion and the torque ripple affecting the stability and reliability of the brushless DC motor, the brushless DC motor mathematical model was analysed combined with modern control theory. A study based on active disturbance rejection controller brushless DC motor commutation torque ripple suppression was preverted. Thus reducing the torque ripple of the brushless DC motor which incorporated DSP processor achieved its highspeed computing algorithms control, and was better able to improve its steady state performance. active disturbance rejection controller (ADRC) inhibits brushless DC motor commutation torque ripple. Eliminating the overshoot of speed response, expanding ripple current phase state observers and detecting system with nonlinear state feedback control rate of the current sense ripple compensation offset error value achieved the effect of inhibiting the phase current ripple in order to inhibit the transfer torque pulsation. The results indicate that active disturbance rejection controller can better suppress DC motor commutation torque ripple than PI control, thereby improving the stability of the motor in motion.

Key words: brushless DC motor; active disturbance rejection controller (ADRC); torque ripple; inhibition