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DESIGN AND DEPLOYMENT OF SMART-SOLAR POWERED CHARGE/SWAP STATION FOR E-RICKSHAWS
ABSTRACT
This research explores the design and deployment of a smart-solar powered charge/swap station tailored for E-Rickshaws, incorporating suitable software solutions. The charger's main function is to convert AC supply voltage to DC for battery charging, tailored to the type of battery used. Easy bikes utilize flooded lead acid batteries, thus the charger design adheres to their requirements. The conventional charger for Easy Bikes comprises a step-down transformer with multiple tappings for voltage adjustment and a rectifier on the low voltage side, resulting in pulsating DC for battery charging. The absence of a capacitor leads to pulsating battery current, with a selection switch enabling users to adjust charging current via turn ratio modification, making the system a constant voltage charger. Initial proposals include three basic designs, each targeting distinct charging mechanisms. The first design utilizes a controlled rectifier for DC charging voltage regulation, while the second involves AC voltage conversion to a high-voltage DC controlled by a DC-DC chopper. The third approach integrates an autotransformer with controlled switching for charging regulation. Simulation efforts in the laboratory assess the feasibility of these designs, followed by PCB design and subsequent laboratory testing. Challenges in the switching circuits prompt a shift towards the third concept, where the transformer of a conventional charger regulates voltage, supported by current and voltage sensors, and a microcontroller-based system for tap selection based on current levels. This third concept ensures constant current charging as recommended by literature, with the system automatically adjusting taps to maintain consistent output current. Upon reaching full charge, the system temporarily switches off before resuming charging to maintain optimal battery health. Notably, the system incorporates safeguards such as a voltage cutoff to prevent excessive gassing. Given the batteries' 150AH capacity, the charging system demonstrates efficacy in achieving efficient and controlled battery charging for E-Rickshaws, enhancing their operational sustainability and longevity.
DESIGN AND DEPLOYMENT OF SMART-SOLAR POWERED CHARGE/SWAP STATION FOR E-RICKSHAWS. GET MORE COMPUTER SCIENCE PROJECT TOPICS AND MATERIALS
