Optimization of Speed Estimation in Induction Motors Based on Sensorless Field-Oriented Control Method

Controlling the performance of electric motors is one of the most essential needs in many industries, and three-phase electric motors are the most widely used in industries. In order to control and estimate the speed of three-phase electric motors without the use of a sensor, a method based on the field-oriented control method in indirect mode has been presented. The proposed model uses the Q-axis current in the stator to estimate the speed in different conditions, and the responses of the proposed method as well as its stability in different states are presented using the simulations performed in the MATLAB software environment. At the end, a comparison with the base model is made and the difference in the performance of the two methods at low speed is investigated.