双电机电动汽车动力耦合机构的设计及其控制策略的研究  

Research of Design and Control Strategy of Power Coupling Mechanism for Dual-motor Electric Vehicle

作　　者：王飞 王铁[1] 武志斐[1] Wang Fei;Wang Tie;Wu Zhifei(Gear Research Institute,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学齿轮研究所

出　　处：《机械传动》2019年第10期141-145,164,共6页Journal of Mechanical Transmission

摘　　要：提出采用双行星排双电机耦合机构解决单电机电动汽车中电机单位质量功率低、低速动力性不足以及高速低转矩利用率低的问题。首先,对设计的新型耦合机构进行动力学分析,并结合某电动车参数匹配出双电机电动汽车参数,分析双电机的耦合特性;其次,基于需求转矩、车速、加速度以及电机工作效率进行控制策略的设计;最后,根据整车各部分的数学模型在Matlab/Simulink中建立相应的驱动模块和控制策略模块并进行数学仿真。结果表明,在动力性能上,新型双行星排动力耦合结构和控制策略能够实现车辆低速大转矩和高速大功率的行驶需求,也对改善电动汽车经济性能有一定的积极作用。A dual planetary row and dual motor coupling mechanism is proposed to solve the problems of low power per unit mass,low power at low speed and low utilization rate of high speed and low torque in single motor electric vehicles.Firstly,the dynamics analysis of the new coupling mechanism is carried out.The param eters of a dual-motor electric vehicle are matched to analyze the coupling characteristics of the two motors.Sec ondly,the control strategy is designed based on the required torque,speed,acceleration and motor efficiency.Finally,the corresponding driving module and control strategy module are built in Matlab/Simulink according to the mathematical model of each part of the vehicle,and the mathematical simulation is carried out.The results show that,in terms of power performance,the new dual planetary platoon power coupling structure and control strategy can meet the driving requirements of low-speed,high-speed and high-power vehicles,and also play a positive role in improving the economic performance of electric vehicles.

关 键 词：双行星排 动力耦合 电动汽车 控制策略 

分 类 号：U46[机械工程—车辆工程]