This paper introduced maximum torque per ampere of position sensorless control of Three-phase synchronous reluctance motor drive system. The proposed system is based on indirect rotor field oriented control . The rotor position is estimated using the active flux observer method . The drive system is investigated at different operating conditions. The proposed system is robust and suitable for high performance three-phase synchronous reluctance motor drives. Simulation is carried out by using the Matlab/Simulink package. The results validate the proposed approaches.