Digital Implementation of Pfc Half Bridge Converter Fed Pmbldc Motor Using Microcontroller

Digital Simulation and implementation of a Power Factor Correction (PFC) half bridge converter based adjustable speed voltage controlled VSI fed PMBLDC motor is presented in this paper. A single-phase AC-DC converter topology based on the half bridge converter is employed for PFC which ensures near unity power factor over wide speed range. The proposed speed control scheme has the concept of DC link voltage control proportional to the desired speed of the PMBLDC motor. The PFC converter based PMBLDCM drive is designed, modeled and simulated using MATLABSimuLink environment. This drive ensures high accuracy and robust operation from near zero to high speed. Simulation and experimental results of these systems are presented and the performance measures are compared. The simulation and experimental results with bridgeless boost converter show that there is an improvement in power factor.