Power Factor Correction in Brushless DC Motor Dual Drive Using Bridgeless Canonical Switching Cell Converter

The main requirements of industrial applications are simplified design, minimum cost, reduced depreciation, and reduction in weight and volume of the system. These requirements have driven to the development of the dual drive systems. Now a days Brushless DC (BLDC) motor have become popular in the industry because of the advantages like improved efficiency, better reliability, high ruggedness, reduced Electromagnetic Interference and magnificent performance over an extensive range of speed. These advantages made BLDC motor suitable for both low and medium power applications such as medical equipment, household appliance, position controller, air conditioning, motion controllers, heating, ventilation, and traction. Use of BLDC drives affects the supply power factor. As a solution to improve supply power factor, a Bridgeless Canonical Switching Cell (CSC) converter is proposed in this paper for power factor correction. Bridgeless Canonical Switching Cell converter-fed, power factor corrected dual parallel connected BLDC motors drive with a single inverter is presented. The speed of the BLDC motor is controlled by varying the input voltage of the Voltage Source Inverter (VSI). Master-Slave (MS) control strategy is used for the control of dual drive. The heavily loaded motor will be selected as the Prime motor, and will be controlled directly, which is done by comparing the rotor positions of both the motors. Performance of the drive system is verified with the simulation results.