Abstract
This paper analyzes the operation of the surface permanent magnet synchronous motor (SPMSM) in a sensorless configuration, with the main objective of speed estimation. It is presented a vector control strategy independent of position sensors, implemented through a voltage inverter with prescribed currents. Advanced algorithms, including the Gopinath observer, are used to accurately determine the rotor speed and position. This plays an essential role in increasing the stability and accuracy of the control system, by reducing estimation errors and ensuring a rapid response to load variations. Performance validation was performed through simulations in the MATLAB/Simulink environment, with the results demonstrating both the accuracy and reliability of sensorless control under various operating conditions. The conclusions highlight the efficiency of the proposed method and its relevance for the development of modern electric drive technologies.