Performance Evaluation of Solar PV-Battery Hybrid System Powered BLDC Motor Speed Control Using Ultra-Lift Luo-Converter

Abstract

The increasing use of solar energy poses challenges in meeting energy demands due to its unpredictable weather conditions. With the growing need for electric drives, integrating solar energy with battery storage through advanced power electronic converters is essential to ensure system stability and energy sufficiency. This design proposes a solar photovoltaic (PV) array and battery-supported brushless DC (BLDC) motor drive capable of operating efficiently and reliably under varying solar irradiance and temperature conditions. The solar PV array output voltage is boosted to the level required by the motor using an ultra-lift Luo-converter, while a bidirectional buck–boost converter manages the power flow between the battery and the DC bus. The BLDC motor is driven by a three-phase voltage source inverter (VSI), whose electronic commutation is controlled using Hall sensor feedback. Motor speed control is achieved through a Proportional–Integral–Derivative (PID) controller designed for the ultra-lift Luo-converter. By addressing the effects of varying irradiance and temperature, the proposed system ensures stable operation. Due to its modular architecture and hybrid energy management capability, the system shows strong potential for applications in solar–battery-powered Computer Numerical Control (CNC) machines and standalone renewable energy systems. The performance evaluation of the proposed BLDC motor speed control system is carried out in MATLAB/Simulink.