Torque ripple reduction in PMSM DTC drives using matrix converters

The paper investigates the use of the small voltage vectors of matrix converters (MC) in order to reduce the inherent torque ripple that appears when direct torque control (DTC) is used to control permanent magnets synchronous motors (PMSM). The new approach will differentiate between small and large torque errors, thus reducing the electromagnetic torque ripple. A comparison between the classical direct torque control using matrix converters and the proposed method is carried out. Results which demonstrate the improvement of the novel direct torque control are shown.