Performance comparison of a canonical switching cell converter fed sensorless PMBLDC motor drive with conventional and fuzzy logic controllers

Abstract

In this paper, speed control, torque ripple minimization and Power Factor Correction (PFC) of a Canonical Switching Cell (CSC) Converter fed sensorless Permanent Magnet Brushless DC (PMBLDC) motor drive system with varying load is discussed. The constant speed of operation with minimum torque ripples and unity power factor operation during transient state is the most difficult control part in the motor drive system. At the starting condition, the current is too high due to the absence of back EMF. Therefore the motor will start with high torque ripples. In order to eliminate the torque ripples during starting condition by limiting the starting current of the motor with properly designed Canonical Switching Cell (CSC) converter and an intelligent controller, which will improve the power factor of the supply system and reliability of the PMBLDC motor. Here, the speed control, torque ripple minimization and power factor correction of a canonical switching cell converter fed sensorless PMBLDC motor during starting and running condition with a conventional and fuzzy logic controllers are proposed. The performance parameters of the PMBLDC motor with these controllers are analyzed through MATLAB/ Simulink software.