Single Stage PV Fed BLDC Motor Water Pumping Application

Abstract: The growth of the solar industry has expanded the importance of PV system design and its application for more reliable and efficient way. BLDC motor is a better substitute of the DC motor and induction motor for PV fed water pumping. A DC-DC conversion stage is required in PV fed water pumping which is driven by a BLDC, for optimise the power using Maximum Power Point Tracking (MPPT). Cost, size, complexity and efficiency is reduced due to power conversion stage. This paper deals about a single stage PV energy conversion system fed BLDC motor, by omitting DC-DC stage. The PV array is operated at its peak power using a Voltage Source Inverter (VSI) and also battery backup is provided. The implemented control cancelled out the need of BLDC motor phase current sensor. No additional control is involved for soft starting and speed control. Performance is evaluated using MATLAB/Simulink based simulation under various operating conditions.

Keywords: Block diagram, Control approach, MPPT, Simulation