Design of a motor controller for electric race car

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Dr. Stumpf Péter Pál
Department of Automation and Applied Informatics

At the beginning of my work I provided a quick overview about the development of electric vehicles from their origins to the present day, mentioning their advantages and disadvantages as well. After presenting the BME Fuse university team and the international student competitions designed to promote and develop energy-efficient vehicles, I outlined the concept and the main features of our vehicle in progress. I designed the simulation model of the vehicle in order to be built up of separate functional units, which are easy to develop further. The unknown parameters of the simulation blocks were calculated or estimated with different methods, then I defined the characteristics of the resistance forces acting on the vehicle. Knowing the resistance, I calculated the sufficient power, choose a suitable type of motor, then I defined the final gear ratio of the drivetrain, which was necessary to develop the mentioned unit.

According to the competition rules I outlined the electrical grid of the vehicle, afterwards I examined the components needed to control BLDC motors and the possible methods of its regulation. After choosing the main components which build up the motor controller’s inverter unit and doing a thermal checkup, I run the simulation on the New European Driving Cycle. The results of this proved my initial calculations, and they provide a good basis for further development.


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