The paper demonstrates the design process of an Interior permanent magnet brushless D.C motor and the subsequent performance analysis by varying the parameters such as windings, stator and rotor slots, and maximum input current and circuit type. Initially, the stator and rotor setup in the motor is designed as an ANSYS RMXPRT model and it is followed by variation in the design parameters. The model is then analysed under a fixed operating load conditions and based on the simulation results various performance characteristics are deduced. The performance curves establish the relationship between various motor designs based parameters such as motor torque, efficiency, power with rated speed variations and induced phase voltage with electrical degrees in the motor operating range. This concludes the parametric analysis of the BLDC motor. The second portion of the research deals with electrical simulation of the designed PM machine in an ANSYS Maxwell suite. It utilizes a 3-D model of the motor and with the necessary boundary conditions and initial operating inputs delivers a no-load simulation and full-load data set of the electrical motor. The objective behind the simulation is to calculate the value and obtain a characteristic curve for the cogging torque of the motor.