The Design Of Driving System And Simulation Analysis Of In-wheel Motor Electric Vehicle

The popularity of automobiles have provided people with great convenience, but also pollutionto our environment and too much pressure to global energy, the development of electric vehicles isone of the important means to help solve these problems, among these, in-wheel motor electricvehicle is the research focus for many universities and enterprises at home and abroad. This paperdesigned and simulated the drive system of In-wheel electric vehicles.The whole structure of the target vehicle was designed, choose lead-acid batteries andpermanent magnet brushless DC motor as the batteries and motors on the basis of contrast of varioustypes of batteries and motors. Calculate and determine the parameters of batteries, motors andcharger according to the demanding of vehicles and other driving conditions.Based on the structure of brushless motor, differential and transfer equations of permanentbrushless DC motor were established; the starting, speed regulating and mechanical characteristics ofIn-wheel motor were analyzed, Fuzzy-PID control strategy for the motor and the design step of it wasgiven, modeled and simulated this strategy in Matlab/Simulink, compared the result with simulationoutcome of only PID control to prove the feasibility of Fuzzy-PID control strategy.The speed and torque control strategy type of electronic differential system was respectivelydescribed, the electronic differential control strategy and control flow when the vehicle is instraight-line and steering travel.The main components of the vehicle was designed and constructed in the three-dimensionaldesign software CATIA, the parts were assembled in CATIA to check whether there is interferenceamong parts and rationality.Constructed the model of In-wheel electric vehicle in Advisor, gave the parameters set of thevehicle, under the joint simulation condition, got the simulation results, analyzed the power anddriving range performance of the target vehicle, compare these figures with those of real constructedvehicle and prove the rationality of the target vehicle, at last the final match of In-wheel motorelectric vehicle was given.