Research On Motor Control System Of Four Wheel Independent Drive Electric Vehicle

The worsening of the energy crisis make electric cars become an important trend in the development of the automotive industry today, but at this stage there is a widespread lack of life electric cars, controlling is not high.And four-wheel independent drive ev represents a new development direction of electric vehicle and four-wheel independent drive technology to integrate the four motor respectively set in four wheel, use the electronic drive instead of the traditional mechanical driving that car chassis fully electronic, can very good solve the problem of insufficient range and controlling is not high.In this paper, based on the DSP motor control of four-wheel independent drive control system of motor of electric vehicle is studied and analyzed.First elaborated the wheel drive electric vehicles at home and abroad development situation and the trend of the development of pure electric vehicles. Secondly, studied the brushless dc motor and analysis, using Matlab/Simulink simulation of brushless dc motor torque response characteristic curve, argument brushless dc motor torque fluctuation is small and the characteristics of high controllability, can be widely used in electric vehicles.Again, in the full bridge inverter as countless dc motor drive, on the basis of the design of the electric vehicle four wheel hub motor based on DSP architecture control system, hardware circuit is based on TI company dedicated to the development of motor control digital processor DSP2407 board, to CCS3.3 development platform for control system software design, and online simulation and experiment on the experimental prototype debug.Finally, using serial communication function based on DSP and Lab VIEW programming, upload of brushless dc motor speed signal to PC, and displays real-time speed of the motor to demonstrate this topic studies the four-wheel independent drive control system of the electric car motor accuracy.