BLDCM CEILING FAN WITH CUK CONVERTER SWITCHED INDUCTOR

Abstract

In order to achieve unity power factor (UPF) functioning at the supply input, the switched-inductor
Cuk (SICuk) converter fed permanent magnet brushless direct current motor (PMBLDCM) is presented in this
work. One uses the SI-Cuk converter as a front-end to address the power quality (PQ) issues with the current
CF. The continuous conduction mode (DCM) operation of the SI-Cuk converter is intended to provide a variable
output with built-in power factor correction (PFC). A potential divider is used to estimate the voltage output of
the converter. To generate high frequency PWM pulses for the converter switch, the reference voltage is
approximated based on the CF reference speed. This minimizes the number of sensors needed and their
associated costs. The changeable The converter's voltage output allows the inverter to run at the commutation
frequency, reducing inverter losses and increasing CF efficiency. By doing away with the necessary position
sensors, the back-EMF sensorless control substantially lowers the cost of CF. In the result section, simulated
results are displayed to validate the SI-Cuk converter's design.