Abstract <p>The method of setting the optimal parameters of the speed controller is presented using the example of <i>DTC</i>, the most common direct torque control system. A simulation model of the asynchronous motor <i>DTC</i> system with a speed controller included in its structure has been developed. The advantage of <i>DTC</i> is that it provides a fast response of the electromagnetic torque on the motor shaft by directly changing the magnetic flux of the stator. A speed controller based on a PI controller is used to set the electromagnetic torque of the motor. A structural diagram of the direct torque control system is presented, and the purpose of the main functional blocks is briefly described. A method is proposed for calculating the parameters of a speed controller tuned to a symmetrical optimum, in which the logarithmic amplitude-frequency response of the desired control system features a second-order astatism. It is found that when setting the <i>DTC</i> system to a technical (modular) optimum, a proportional P-controller can be used as a speed controller, providing a given optimal aperiodic character of the transient process. The results of simulation modeling obtained during the study of the operability of the developed controller are presented. The stability of the <i>DTC</i> system to perturbations in the form of an abrupt change in the set speed are evaluated. The nature of the transient process in terms of speed is shown to correspond to a symmetric and modular optimum. Based on studies of the direct torque control system with the developed structure of the speed controller, the effectiveness of the proposed method for calculating its parameters has been proven.</p>