Torque ripple suppression control for PM motor with current control based on PTC

PM motor drive systems are widely used for industrial drives. However, PM motors basically produce the torque ripple due to the fluctuation of the magnetic field distribution. Dead time of the inverter, offset of sensors and current measurement errors lead to the torque ripple, too. The torque ripple leads vibration noises. In this paper, we proposed a torque ripple suppression method based on perfect tracking control, in which the torque ripple is measured by a low-bandwidth sensor. Finally, we show the advantages of the proposed method by simulations and experiments with a SPMSM.