An FLC based BLDCM Drive with Power Factor Improvement Using Isolated Zeta Converter

Abstract

This project deals with an Isolated Zeta Converter as a power-factor-correction converter for a permanent magnet (PM) brushless dc motor (PMBLDCM) fed through a diode bridge rectifier from a single-phase ac mains, using Fuzzy Logic Controller. A three-phase voltage-source inverter is used as an electronic commutator to operate the drive. The speed of the motor is controlled by the voltage control at dc link which is proportional to the desired speed of the PMBLDCM. The stator currents of the PMBLDCM during change in the reference speed are controlled within the specified limits of the reference dc link voltage. The proposed PMBLDCM drive (PMBLDCMD) is designed and modeled, and its performance is evaluated in Mat lab–Simulink environment. Simulated results are presented to demonstrate an improved power factor at ac mains of the PMBLDCMD system in a wide range of speed. Test results of a developed controller are also presented to validate the design and model of the drive.