Optimized Design and Control of a Solar-Battery Powered BLDC Drive Using Ultra High-Gain Switched-Capacitor Boost Converter Ripple Reduction

This paper presents the design and control of a solar battery powered Brushless DC (BLDC) motor drive system utilizing an ultra high gain switched capacitor boost DC DC converter for efficient energy management and ripple current reduction. The proposed system integrates solar photovoltaic (PV) energy with a battery energy storage unit to ensure continuous and reliable power delivery to both the BLDC drive and associated DC loads. To extract maximum power from the PV source under varying irradiance conditions, an Incremental Conductance (INC) Maximum Power Point Tracking (MPPT) algorithm is employed. The high gain switched capacitor boost converter minimizes source current ripple and reduces voltage stress on power devices, enhancing overall system efficiency and reliability. A bidirectional buck boost converter is used to manage battery charging and discharging operations, maintaining backup support during low solar availability. A double loop control strategy consisting of inner current and outer voltage control loops is implemented to regulate the DC bus voltage and ensure system stability. The entire system is modeled and validated using MATLAB Simulink, demonstrating effective power flow control, improved voltage regulation, and reduced ripple performance for electric drive and DC load applications.