PMSM torque ripple suppression based on sliding mode harmonic control
In order to solve the problem of harmonic electromagnetic torque ripple caused by harmonic current during operation of permanent magnet synchronous motor(PMSM),a harmonic controller based on sliding mode control(SMC)was studied to achieve the reduction of PMSM torque harmonics in the full frequency domain.The motor speed harmonic current expectation value of the Q-axis is obtained by extracting the motor speed harmonic controller through the speed harmonic sliding mode controller,which avoids the early determination of the motor in the traditional harmonic input method.The inverter input-voltage is obtained by the current harmonic sliding mode controller.In view of the fast response frequency of harmonic signals,a new approach law function is designed,and a fuzzy neural network controller(FNNC)is introduced to modify the approach law parameters online,which greatly indicates the dynamic quality of the SMC.The simulation results show that the method avoids complicated mathematical operation,has good dynamic performance under different conditions,and effectively inhibits the harmonic electromagnetic torque ripple.
万方数据
维普
