Matching Optimization And Energy Management Of A Dual-motor Four-stall Powertrain System

It's convenient for us to go to anywhere because of the rapid development of the automotive,but vehicle also causes a lot of environmental pollution and lack of oil.The internal combustion engine has developed very well now and there is no possibility of a lar ge-scale decline in em issions and fuel consum ption.In order to solve these problems,the world is actively developing pure electric vehicles to replace traditional diesel automotives.At present,one motor with the single reducer is used by m ost of the pure electric vehicles on the market.This drive-train is very easy to implement,but it's not the best way to develop dynamic and economy of the vehicle.In view of shortcomings of the single reducer drive-train of pure electric vehicles,the following research works was carried out in this paper:This paper presents a dual-motor four-speed drive system and performs parameter matching with the traditional method.two motors provide the power,each motor with two stalls,There are two drive modes,single-motor drive and dual-motor drive.How to improve the performance of vehicle is also explained.The de sign parameters and performance of Q60 FB is used as design index of this paper.The parameters of the two motors were determined using a traditional method.A new parameter matching and optimization method is designed.The efficiency and dynamics of the vehicle is considered when design parameters.The parameters of economical motor are obtained by counting the high frequency areas of the cyclic test conditions,and the parameters of the power motor are calculated by the optimization algorithm.The genetic optimization algorithm is used to optimize five ratios,and two goals of optim ization is the dynam ic and econom y of th e vehicle.This paper also introduced AMESim software and its Optimization tools.Design vehicle control strate gy.The controller selects the appropriate stall and controls the synchronizer shifting.It According to the current speed and torque demand,the control strategy realizes the switching of different modes.When two motors are working together,a reasonable torque distribution strategy is designed to utilize the high efficiency area of two motors.The design of the vehicle control strategy is used for the normal driving of the vehicle and can effectively take advantage of the dualmotor four-stall powertrain system.The co-simulation of AMESim m odel and Simulink model ran to verify the reliability of the model.One motor with single reducer model,the traditional matched dual-motor four-stall model,and the new method matched dual-motor four-stall model are respectively operated to compare the economy and dynamics of the three schemes to verification of the supe riority of dua l motor multi-drive system and parameter matching method based on cyclic test conditions statistics...