DefinePK

Abstract

AC to DC conversion with the help of power electronic converters is very much used these days in many applications. Rectification of input supply is essential in many areas of engineering especially in motor drive applications. BLDC motor is fed with DC supply and need a rectifier to convert available AC supply to DC type. Rectification from input AC supply to DC output with simple diode bridge rectifier insists for an output capacitance for stiff DC output. The presence of capacitance at the output of DC side deteriorates source power factor and reduced power factor at source side can cause serious problems in the system. This phenomenon insists for power factor correction. Power factor correction using DC-DC converters is a general practice. This paper presents a comparative evaluation of different types of power factor correction converters for BLDC motor drive application. Power factor correction converters like current follower Buck converter, Bridgeless Buck converter and Hybrid Buck converters were presented in this paper for evaluation. The Simulink models and results are developed using MATLAB/SIMULINK software. Power factor angle between source voltage and source current was presented with all three converters and THD in stator current was also depicted.