This paper presents a controller which consists of a Proportional, Integral (PI) and fuzzy speed controller for the sensorless speed control of Permanent Magnet Synchronous Motor (PMSM) using Model Reference Adaptive System (MRAS). In this paper the sensorless control of PMSM is studied. The study contains two main purposes; the first is to find a simple effective method to estimate the rotor position and angular speed of the PMSM, The second is to regulate the speed of the motor with varying the load using the PI controller and the fuzzy controller. The simulation of the system is established using MATLAB package. This paper mainly focuses on designing the MRAS algorithm in order to estimate rotor speed. When the load torque changes suddenly this algorithm decreases the rise time to reach the speed reference.