Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Design of a regenerative braking system for a bicycle driven by an electric motor of 500 W
Submission Author:
Luis André Vilcahuamán Hinostroza , Lima , Peru
Co-Authors:
Julio Cesar Cuisano Egusquiza
Presenter: Luis André Vilcahuamán Hinostroza
doi://10.26678/ABCM.COBEM2021.COB2021-2344
Abstract
Lima, the capital city of Peru, has a large amount of internal combustion engine vehicles used for private, public and heavy load transport. This contributes not only to the vehicles traffic congestions all along the city, but to unnecessary emissions and noise. An alternative solution for moving around the city, and reducing the impact of motor vehicles, is the use of small vehicles and free of emissions such as bicycles. Between 2012 and 2017, these two-wheeled vehicles have experienced a tendency of having electric motors for pedal assistance or direct drive, changing into electric bicycles. Using a bicycle with a direct drive electric motor becomes a great alternative for moving large distances without physical fatigue. However, the major problem is the limited capacity of the battery and the hours it takes to fully charge. This makes critical to manage the energy as efficient as possible, which leads to focusing on the loss of energy during the braking. This energy can be recovered by the use of a regenerative braking system. The subject of the present study is to establish the equations and mathematical models required for describing the dynamics of the main components of the system. After defining the characteristic parameters of the proposed system, and using the equations defined for its dynamics, the systems behavior in various braking conditions has been evaluated by numeric simulation in MATLAB’s Simulink. The results indicate that it is possible to recover up to 1.32 kJ braking from 25 km/h to 8 km/h in 11.25 seconds. However, the maximum deceleration obtained 0.481 m/s2 represents approximately half of the average deceleration of bicycles in driving cycles in urban areas as Lima.
Keywords
Regenerative braking system, BLDC Motor, Electric bicycle, Simulation
