Enhancement of PFC and Torque Ripple Reduction using BL Buck-Boost Converter fed HCC BLDC Drive

Abstract

This paper shows another PFC bridgeless (BL) buck–boost converter for brushless direct current (BLDC) motor drive application in low -power applications with hysteresis current controller is implemented for torque ripple minimization. The number of components in the converter circuit is less. In the converter part resonant mode of operation gives zero current switching. Since this topology operates in discontinuous conduction mode it is suitable only for low power applications. BLDC Motors found applications in air conditioners etc. Here the BLDC motor speed control is achieved by DC link control. So the stress on the switches used in electronic commutation part of BLDC motor gets reduced. Finally the hysteresis current controller (HCC) is implemented with current feedback loop and it is observe that torque ripples are minimized. The execution of the proposed system is in MATLAB/Simulink software.

Keywords: Bridgeless (BL) Buck–Boost Converter; Brushless Direct Current (BLDC) Motor; Power Factor Corrected (PFC) ; Hysteresis Current Controller (HCC).