双电机耦合驱动电动汽车驱动模式划分与优化

为充分发挥一款双电机耦合驱动系统电动汽车(DMCP-EV)多驱动模式的节能优势,制定了基于系统效率最优的驱动模式控制策略。根据该双电机耦合驱动系统的结构特点,定义了电机4种驱动模式并分别建立其动力学驱动模型和系统效率模型。在满足动力性要求的前提下,分析并划分了各驱动模式的工作范围,以系统效率为优化目标,采用粒子群优化算法进行优化,获得最佳的驱动模式切换控制和转矩分配策略。开展了Matlab/Simulink仿真和硬件在环试验验证。结果表明,经系统效率优化的驱动模式在满足动力性要求的前提下,有效提高了双电机耦合驱动系统的经济性,能耗降低11%。

Division and Optimization of Driving Modes of Electric Vehicles with Dual-motor Coupling-propulsion Powertrain

To give full play to the energy saving advantage of the multi-drive mode of an electric vehicle equipped with dual-motor coupling-propulsion powertrain(DMCP-EV),a driving mode control strategy based on optimal system efficiency is worked out.According to the configuration of DMCP,four driving modes are defined and their dynamic driving models and system efficiency model are established respectively.On the premise of meeting the requirements of power performance,the operation ranges of four driving modes are analyzed and divided.With the system efficiency as optimization objective,an optimization is conducted by using particle swarm optimization algorithm,and an optimal strategy for driving mode switching and torque distribution is obtained.Finally,a validation is performed by both Matlab/Simulink simulation and hardware-in-the-loop experiment.The results show that the driving mode with system efficiency optimized can effectively enhance the energy economy of DMCP-EV,with its energy consumption reducing by 11%while meeting the requirements of power performance.