Reduction of Torque Ripple in Direct Torque Control Method of Matrix Converter Fed Five-Phase Permanent Magnet Synchronous Motor

Recently, multiphase motors have gained an increased attention in order to their advantages in comparison with their three-phase counterparts. In recent literatures, only the control of voltage source inverters (VSI)-fed five-phase motors has been investigated. Matrix converters have several advantages over VSIs such as the absence of dc-link capacitors, lower volume and also higher number of output voltage vectors. In this paper a new direct torque control (DTC) of matrix converter-fed five-phase PMSM is presented. One of the major disadvantages of DTC method is the high torque ripple. In this presented method, using the higher number of output voltage vectors of matrix converter, torque ripple is reduced and also unity input power factor is achieved. Simulation results show the effectiveness of presented method.