Abstract
Direct torque control (DTC) of five-phase PMSMs has been investigated in many literatures. Besides many advantages of this method, large harmonic currents is one the major drawbacks of this scheme. Space vector modulation (SVM) methods have been applied to DTC algorithm to eliminate this problem. But it should be mentioned that SVM methods have complicated calculations. This paper proposes a simple scheme not only uses the DTC method based hysteresis comparators and maintain its simplicity, but eliminates the large harmonic currents. Also, the five-phase PMSM is fed by a three-phase to five-phase matrix converter (MC). Lack of bulky dc-link capacitor and controllable input power factor are some of advantages of MCs. Therefore, the presented method uses the advantages of MC and DTC method and also eliminates the large harmonic currents problem.
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