Carregador de baterias usando energia de um sistema bio-eletromecânico

Abstract

This work presents the development of a bioelectromechanical system (BEM) for charging stationary VRLA batteries using energy generated by the user’s physical effort on a modified exercise bike. The system converts mechanical energy into electrical energy through a permanent magnet generator, followed by a two-stage electronic conversion process. The first stage is a three-phase rectifier that converts the generator’s AC voltage into DC, creating an intermediate DC bus. The second stage consists of a DC-DC Buck converter, responsible for adjusting the voltage and current to optimal levels for efficient battery charging. The system is controlled by an STM32F030F4P6 microcontroller, which regulates the charging voltage and current, ensuring safety and energy efficiency. The study includes theoretical analyses, mathematical modeling, simulations, and experimental validation. The results confirm the feasibility of the proposed solution, serving both as an incentive for physical activity and as a sustainable alternative for energy storage and efficient utilization. The system specifications include a nominal output power of 100 W, a DC bus voltage range of 150 V to 200 V, and a battery bank voltage of 21 V to 27 V.