Wheel Drive Electric Vehicle Drive System

This thesis is focused on the study of a TMS320F2812 DSP based control system for in-wheel driven electric vehicles. The researches include both theoretical and implemental issues of the control system. The experimental studies for a prototype are also conduced.Firstly, the mathematical model for permanent magnet brushless in-wheel motors is proposed based on the characteristics of electrical vehicle prototype. Consequently, the dynamical performances of the electrical vehicle prototype are extensively investigated by using MATLAB/SIMULINK.Secondly, an applicable in-wheel driven control strategy is introduced. In order to obtain excellent dynamical performances, a new acceleration slip regulation system based on fuzzy control is designed. Using an efficient and low cost design methodology, a practical electric differential algorithm is put forward.Finally, by using the aforementioned control strategy and digital signal processing technique, a DSP2812 based control system of a two in-wheel driven electric vehicle is developed. This system uses only one DSP2812 to independently control two driven motors, giving rise to an excellent controlling ability and a running stability of the controlled electric vehicles.