Abstarct: The aim of this project is to improve driving performance of permanent magnet linear synchronous motor (PMLSM) controlled by the direct thrust force control method (DTFC). The low steady-state error (approximately zero), low sensitivity to motor parameters variations and mechanical disturbances and the small position and speed tracking error, yield’s performance improvement. In the next step of project, designing a stator resistance estimator independent of machine parameters, a proper functioning against the stator lixnkage flux estimation error was achieved. Furthermore, employing a four switch three-phase inverter, a simpler switching table was replaced to reduce the force ripple generated by switching table. Finally a speed-sensorless approach that involves a load disturbance observer was designed.The proposed speed-sensorless approach has a simple computing algorithm baxsed on recursive least squares estimation method, therefore it is unaffected by the time-variant motor parameters nor is affected by the uncertainties. Also it caused the system not to use encoders anymore. Simulation results confirm that the performance of the proposed drive is good and better than the traditional ones under different conditions, such as tracking the position command in the presence of external load disturbance.