Abstract
Research and/or Engineering Questions/Objective
The motor is the core of the drive system for electrical vehicles. Making reasonable matches for motor of electrical vehicles and improving the working efficiency is critical for ameliorating the dynamic performance of electric vehicle and mileage. This paper aims at making relevant research on these problems.
Methodology
This research is based on the parameters and performance of the electric vehicle which is on sale. According to the features of popular electric vehicle drive system layout, it focus on front-motor-drive layout and hub / rim-motor-drive layout. Motor parameters, transmission system, power battery parameters and so on are redesigned. Vehicle simulation model is established. The dynamic performance and distance per charge of the electric vehicle will be verified to if the redesigns meet the requirements. Comparison of different driving motor layouts are arranged in such a way that influence on the dynamic performance of electric vehicle.
Results
As the results indicates, the matching parameters and designs of components meet the requirements. Vehicle performance is stable. The dynamic performance and distance per charge of electric vehicles with different drive motor layouts are achieved the expected goal. Comparing the front-wheel-drive with rear-wheel-drive which are applied in single-motor layout about the highest speed, one hundred kilometers acceleration time and so on, the rear-wheel-drive layout is better. The comparison of different motor drive layout shows that the motor working efficiency hub / rim-motor-drive layout is improved compared with the single motor layout. The performance of highest speed and the maximum grade ability are better than the single motor drive layout. The analysis shows that the rear wheel drive mode of the double wheel hub is the optimal layout.
Limitations of this study
Because of the diversity of the driving system of electric vehicle and complexity of control system, this research only focus on Front-motor layout and hub / rim-motor-drive layout which has a bright future. The simulation model which has been established is under the quasi - static conditions. The model can not predict the transient phenomena for 1/10 seconds, such as mechanical vibration.
What does the paper offer that is new in the field including in comparison to other work by the authors?
Besides parameter matching and design verification, this paper also make research on different drive system layout. The performance results are compared and analyzed. The relative optimal parameter matching and the drive motor layout has been determined. It is the rear-wheel-drive of dual hub motor layout. The reference is provided for the design of electric vehicles in the future
Conclusions
The rear-wheel-drive of dual hub motor layout can achieve the best performance under different working conditions and adjust to different road conditions. Hub / rim-motor-drive mode has a significance to improve the working efficiency of vehicle, the efficiency of energy utilization and to optimize the performance of the vehicle.
Key Words: Electric Vehicle, Drive Motor, Parameter Matching, Layout