Abstarct: This investigation describes direct torque control (DTC) of a permanent magnet synchronous motor using conventional DTC then fuzzy logic metod is presented.an outstanding feature of the conventional DTC for permanent magnet synchronous motors is its fast dynamic response, However large torque and flux lixnkage ripples are generated. because of the use of the hysteresis controller and the crude position space voltage vectore, In this method torque error, stator flux lixnkage error, and stator flux angle position have been correctly fuzzified using several fuzzy subsets. So the optimum voltage space vector has been selected in order to minimize the torque ripple and flux lixnkage ripple. In this investigation fuzzy and conventional direct torque control of a permanent magnet synchronous motor under speed reference and also mechanical load have been simulated, and finally a performance comparison between conventional direct torque control and fuzzy baxsed direct torque control has been presented. The results show the torque, flux lixnkage and stator current ripple percentages have been considerably decreased.