SYSTEM FOR AUTOMATIC SELECTION OF THE SPEED RATE OF ELECTRIC VEHICLES FOR REDUCING THE POWER CONSUMPTION
DOI:
https://doi.org/10.15802/stp2017/104360Keywords:
public electric transport, energy saving, specific energy consumption, standardization, motion modeling, traffic modeling, traffic regimes, CAN networkAbstract
Purpose. The work is aimed to design a system for automatic selection of the optimal traffic modes and automatic monitoring of the electric energy consumption by electric transport. This automatic system should provide for the minimum energy expenses. Methodology. Current methodologies: 1) mathematical modeling of traffic modes of ground electric vehicles; 2) comparison of modelling results with the statistical monitoring; 3) system development for automatic choice of traffic modes of electric transport with minimal electrical energy consumptions taking into account the given route schedules and the limitations imposed by the general traffic rules. Findings. The authors obtained a mathematical dependency of the energy consumption by electric transport enterprises on the monthly averaged environment temperature was obtained. A system which allows for an automatic selection of the speed limit and provides automatic monitoring of the electrical energy consumption by electric vehicles was proposed in the form of local network, which works together with existing GPS system. Originality. A mathematical model for calculating the motion curves and energy consumption of electric vehicles has been developed. This model takes into account the characteristic values of the motor engine and the steering system, the change of the mass when loading or unloading passengers, the slopes and radii of the roads, the limitations given by the general traffic rules, and other factors. The dependency of the energy consumption on the averaged monthly environment temperature for public electric transport companies has been calculated. Practical value. The developed mathematical model simplifies the calculations of the traffic dynamics and energy consumption. It can be used for calculating the routing maps, for design and upgrade of the power networks, for development of the electricity saving measures. The system simplifies the work of the vehicle driver and allows reducing the energy consumption, also provides for an automatic energy cost monitoring. The calculated dependency of the energy consumption on the environment temperature may be used for an improvement of methods which regulate the work of the public electric transport companies. It has been proved that there is a possibility for reducing electrical energy consumption by 10% to 45% using the efficient motion regimes. Author’s certificate was obtained for the invention of the system for an automatic selection of the velocity regime for a public electric transport vehicle.
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