FAYCEL BENDENNIKHALIL DOUIOUENCA/KHODJA DJALALEDDINE2025-09-092025-09-092025-09-0929/ELC/2025https://repository.univ-msila.dz/handle/123456789/47512This project aims to design and implement a sensorless automatic control system for a three-phase motor using an S7-1200 programmable logic controller (PLC), a SINAMICS G120 variable speed drive (VSD), and an HMI interface, all programmed through TIA Portal and communicating via the PROFINET protocol. The system enables precise control of motor speed and direction without the need for a mechanical sensor, reducing costs and increasing reliability. The system was successfully tested in practice and has potential for future development.enThesis