A ILC scheme and passive filter for PMSM speed control to minimize pulating torque

Torque ripple in the motor always caused poor operation quality of the system. Here, has proposed a new way to suppress the torque ripple of the PMSM. In this paper, use the Iterative learning Control (ILC) in time domain with passive filter to weaken the Torque Pulsating. The ILC was used to suppress the periodic torque ripple as cogging torque, nonperfect sinusoidal flux density distribution and so on, while passive filter can be well reduce non-repeated ripple, such as, switching harmonics and harmonic voltages supplied by the power inverter which constitute the major source of unavoidable harmonics. Finally, the simulation results proved that the proposed method is feasible and useful.