Multiple PFC Circuit Topologies For 24 V BLDC Motor Drive

Abstract

            Simplicity and high reliability are common features of Brushless dc (BLDC) motors, so are commonly used.The conduction losses associated with Bridgeless converters are less as compared to conventional diode bridge rectifiers so are preferred. In this paperspeed control analysis is carried out on three different bridgeless power factor correction converters and bridge converterforBLDC motor. The three bridgeless PFC converters consider here are Bridgeless Canonical Switching Cell converter, Bridgeless Buck-Boost converter and Bridgeless Luo converter. The absence of an input diode bridge and the presence of only semiconductor switches in the current flowing path during each switching cycle result in less conduction losses and an improved Efficiency of converter compared to the conventional PFC converter. BLDC motor speed and output DC voltage settling times are compared. The analysis is carried out in MATLAB software forwith design parameters.