Research on Electronic Differential SpeedControl System of New Wheel Hub Motor Drive Electric Vehicle

At present,some novel electric vehicles(EVs)adopt independent driving methods.The representative is the IZA electric vehicle launched by Tokyo Electric Power.The integrated technology is a direct drive method.Each wheel is equipped with a hub motor and no longer requires transmission.The mechanism and the differential gear can distribute the power of the two motors according to the required power,so that the efficiency of the entire system is improved,and at the same time,an electronic differential drive control system is required for such a drive unit.
There are few relevant studies available,most of which focus on the design of special motors with differential operation.Based on the analysis of the automobile differential phenomenon,this paper presents a new electronic differential scheme for the electric drive of the hub-and-pinion-drive electric vehicle,which is suitable for low-speed operation.It also designs and implements a 12-channel full-comparison PWM based on TMS320F2407 DSP(two event manager modules).The output can realize the control of two-wheel motor drive control system of two wheels,widely used to determine the driving strategy of the vehicle(see the fund of the Youth Science Fund of Ningbo Municipal Science and Technology Commission.