Brushless DC Motors play a significant role in numerous applications. Power density and efficiency are two prominent factors associated with design of these motors. Three phase brushless DC motor is a synchronous permanent magnet motor with rectangular or trapezoidal supply. These motors have a four pole permanent magnet rotors. Stator is a three phase winding supplied by DC voltage. Connecting and disconnecting DC supply depends on the rotor position. For each 30 mechanical degrees of rotor,

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... e supply of windings changes. To detect the position of rotor various methods might be utilized such as hall effect sensor. In this paper a brushless DC Motor is modeled and simulated using MATLAB/SIMULINK.