Mathematical Modelling of a Wind Charging System for an Electric Vehicle
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Abstract
This study is centred on modelling a system for charging an electric vehicle that is safe to use and very economical. The problem of charging is the strongest limiting factor of making electric vehicles more attractive in the automobile market. Though the plug-in charging system has proven overtime to be the most reliant charging method, however, its availability has really shifted focus of design on many other alternatives. A wind turbine using aerodynamic drag force is modelled in this study as the power input source for battery charging. The system behaviour is designed and analysed for when the vehicle is in motion. Meanwhile, the system will keep charging and storing power in the batteries of the EV as long as the ambient wind has sufficient power to drive the rotor blade at rated speed when the vehicle is stationary. Results of the modelled system showed that an increase in velocity of the vehicle increases the power output, which invariably increases the charging rate of the battery. At the speed of 40 km/hr a designed blade diameter of 0.6 m shows the best performance. It is recommended for further study that the system can be improved by making the rotor blades adjustable (varying blade angle). This invariably gives a better control on power and torque and yields better efficiency for the system.
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References
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