J.Sathish
PG student-
Department of EEE - SBM college of Engineering and technology, Dindigul,
Tamilnadu, India.
A power factor corrected (PFC) bridgeless (BL) buck–boost converter-fed
brushless direct current (BLDC) motor drive as a cost-effective solution for
low-power applications. An approach of speed control of the BLDC motor by
controlling the dc link voltage of the voltage source inverter (VSI) is used
with a single voltage sensor. This facilitates the operation of VSI at
fundamental frequency switching by using the electronic commutation of the BLDC
motor which offers reduced switching losses. A 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. A PFC
BL buck–boost converter is designed to operate in discontinuous inductor
current mode (DICM) to provide an inherent PFC at ac mains. The performance of
the proposed drive is evaluated over a wide range of speed control and varying
supply voltages (universal ac mains at 90–265 V) with improved power quality at
ac mains. The performance of the proposed drive is simulated in MATLAB/Simulink.
