Research On Acceleration Control Strategy For Electric Vehicle Based On Energy Consumption Per Kilometer

Due to the huge energy consumption during the acceleration process,the EV has a problem of short driving range,which restricts its development and popularization.Therefore,one certain type of EV is taken as the research object,the EV acceleration control strategy for the electric energy consumption per kilometer is studied with the aim at reducing the electric energy consumption per kilometer.Firstly,the control principle of the EV drive system in the acceleration process is studied.The electric energy consumption test system of EV was built.The electric energy consumption experiment of EV based on different typical working conditions and different acceleration processes were carried out.The relationship between speed and acceleration of EV and its electric energy consumption per kilometer is studied.Base on the EV theory,the electric energy consumption per kilometer of different EV acceleration curves and its influencing factors are studied.The relationship between different acceleration curves of EV and the minimum model loss control strategy of PMSM is studied.Then,the difference of the electric energy consumption per kilometer between the twoacceleration and the single acceleration way of EV is studied,and the influence of the parameter variation of the two acceleration curves on the energy consumption per kilometer is analyzed.The research conclusions are extended to the multi-acceleration curve through the mathematical induction.An optimization design method for multi-acceleration curve of EV based on the genetic algorithm is proposed,which mainly includes the determination of the number of acceleration n of the curve,the determination of the optimization constraints,etc.The acceleration conditions are designed by using the optimization design method.Afterwards,based on the multi-acceleration curve optimization design method of EV,combined with the driver's intention coefficient fuzzy identification,vehicle speed grading control,acceleration time calculation,the motor model loss minimum control and other modules,the EV acceleration control strategy for the electric energy consumption per kilometer is designed.The strategy realizes the integration of the optimal acceleration curve of EV and the PMSM control strategy.Based on Matlab/Simulink simulation software,the EV acceleration control strategy simulation model for the electric energy consumption per kilometer is built.The simulation and analysis of the EV acceleration control strategy for the electric energy consumption per kilometer are carried out according to different acceleration conditions and the effectiveness of the designed EV acceleration control strategy for the electric energy consumption per kilometer is verified.Finally,a PMSM test bench platform is built.Taking a PMSM as the experimental object,the motor bench experiment of the electric energy consumption comparison experiment between the multi-acceleration curve and the single acceleration curve of the EV is carried out.The EV energy consumption test system is built,and the energy consumption comparison experiment of the EV multi-acceleration curve is carried out.The feasibility of the designed EV acceleration control strategy for the electric energy consumption per kilometer is verified.