An Efficient Prototype for PV based Water Pumping Solutions

Abstract

This paper discusses the Cuk and Zeta converter-fed BLDC motors based on power factor correction. The comparative study is based on parameters like torque, stator current, power factor, and rotor speed of both converter-fed BLDC drives. The DC link voltage of the Voltage Source Inverter (VSI) is maintained constant in traditional PFC converter designs. This PFC converter’s primary drawback was complicated control, which necessitates a significant number of sensors. The proposed DC-DC converter follows the voltage follower approach in continuous conduction mode (CCM) to improve the power factor. Also, it helps to reduce switching losses and the stress on power devices. Low-frequency switching is utilized in the VSI to control the speed of the motor by changing the dc bus voltage. The switching loss of VSI is reduced by adopting fundamental frequency switching. This improves the efficiency of the system. Electronic commutation of the BLDC motor helps to eliminate the sensors required for the measurement of DC link voltage and phase currents. The proposed system with proportional-integral (PI) control provides a profitable solution for low-power applications. The performance of converters fed by BLDC motors is studied using MATLAB simulation. The results from Simulink show that the Cuk converter’s performance is better than the Zeta converter. So, the prototype hardware of the suggested model, i.e., the Cuk converter-fed BLDC motor, is implemented.