An analysis of power factor correction in brushless direct current motor drives using bridgeless SEPIC converter

This paper presents the analysis and design of on front end bridgeless single-ended primary-inductance converter (SEPIC) based power factor correction, with output voltage regulation and high frequency isolation working in discontinuous conduction mode. The switching loss in VSI is minimized by an electronic commutation of Brushless DC motor (BLDCM) is used to operate in a low-frequency operation. To improve the efficiency further, the removal of the diode bridge rectifier with the replacement of bridgeless topologies which offers less conduction losses, by the suggested international power quality standards, a wide range of speed control is obtained with improved power quality BLDC motor drive is proposed and simulated in MATLAB/SIMULINK.