In recent years Brushless DC motors (BLDC) area unit the analysis hot spot in speed exactness and unit applications because of its high responsibleness, easy frame, high potency, quick dynamic response, compact size, low maintenance, etc., Because of electronic commutation, the ripples are generated in the electromagnetic torque and the power factor of the AC mains gets affected due to its operation. The operation of BLDC motors is based on the rotor position sensing using sensors or sensorless scheme. In the proposed work, the performance of the BLDC motor is improved through the reduction of ripples in the electromagnetic torque. A CUK DC-DC converter topology is implemented in this method that reduces the power quality problems and improves the power factor at AC mains. Among different torque minimization techniques, implementation of the Voltage Source Inverter (VSI) gives better performance in the efficiency as well as smoother distortion less stator current. So it is implemented in this work to reduce the torque ripples. From the simulation results, it is observed that the efficiency of the motor is improved by power factor correction and torque ripples reduction.