Research On Steering Strategy For Wheel Motors Drive Electric Vehicle

Hundred old years of traditional automobile development have made great contribution to human society, at the same time, also has brought human serious energy shortage and environmental pollution, Under the pressure of these two aspects, Development of vehicle that can solve the problem of energy, environment protection and traffic or nearly zero emission---electric vehicle, Let nature take its course, becoming the development trend of the automotive industry. Among them, As a new electric vehicle in the form of wheel hub motor driving is focus on attention by academic and engineering with the advantages of its simple structure, compact, small footprint, responsive, high transmission efficiency, And the satisfactory control feature, wide application prospect, electric cars of Wheel hub motor driving became the research focus in the field of automobile.In this paper, studying model selection, structure, characteristics of wheel hub motor by analyzing the development background, current situation at home and abroad, the key technology of electric vehicles wheel hub motor drive, Choose the most suitable permanent magnet brushless dc motor as a hub motor of the experiment, And select the motor drive control strategy through its working principle, mathematical modeling.This article also Determines the overall control strategy of electronic differential system, through contrasting the differential of traditional internal combustion engine vehicle and the electronic differential technology of electric car, Analyzing the technology advantage of electronic differential, And based on the Ackerman geometry analyzing steering principle and process of electric vehicles wheel hub motor drive, At the same time, distributing torque and speed of the electric vehicle steering.The last, In this paper, through the simulation of electric car four wheel motor drive making the experiment of steering driving and straight driving to verify its feasibility.