参数优化与新型双电机耦合扭矩矢量驱动系统的多模式运行

Abstract Electric vehicles (EVs) have developed rapidly in the past decade, with a heightened focus on the development of high-performance EVs in recent years. However, the contradiction between drive performance and efficiency of electric drive systems has not been adequately resolved. To provide a potential solution to this issue, a novel dual-motor coupling torque vectoring drive system (DCTVD) is proposed in this paper through exploring potentially optimal power coupling configurations of dual-motor drive units. Correspondingly, based on the multi-mode operation capability of the DCTVD, a parameter optimization method, a drive mode switching control strategy, and a torque vectoring control strategy are proposed and discussed in detail. After applying these methods and strategies, the energy-saving potential of the DCTVD is verified by simulation. Results under typical driving cycle tests indicate that the DCTVD, with the parameter optimization and drive mode switching control strategy, shows a significant energy-saving improvements compared to a traditional single-motor single-speed drive system. Additionally, results under turning conditions indicate that the DCTVD has an observable energy-saving effect under certain conditions with the torque vectoring control strategy.