A Flexible-Speed Control of BLDC Motor Drive with Fuzzy Based PFC Bridgeless Buck–Boost Converter
For small-power applications a power factor corrected (PFC) bridgeless buck–boost converter-fed brushless
direct current (BLDC) motor drive as a low cost key. PFCBL buck–boost converter is designed to work in discontinuous
inductor current mode (DICM) to offer an inherent PFC at ac mains. The working of the proposed drive is calculated over a
wide range of speed control and unstable supply voltages with improved power quality at ac mains. The obtained power
quality indices are within the acceptable limits of international power quality standards a single voltage sensor is used by
controlling the dc link voltage of the voltage source inverter (VSI) in BLDC motor speed control. This provides the
operation of VSI at fundamental frequency switching by using the electronic commutation of the BLDC motor which offers
reduced switching losses. A Bridgeless (BL) configuration of the buck–boost converter is proposed which offers the
elimination of the diode bridge rectifier, thus reducing the conduction losses associated with it. The performance of the
proposed drive is simulated in MATLAB/Simulink.
Keywords - Power Quality, Bridgeless (BL) Buck–Boost Converter, BLDC) Motor, Discontinuous Inductor Current Mode
(DICM), Power Factor Corrected (PFC).