集中驱动式纯电动车动力传动系统扭转振动研究

Powertrain torsional vibration of a central-driven pure EV

针对电动车存在的动力传动系统扭转振动问题,提出综合考虑控制电机动态特性及传动系统间隙/柔性的机电耦合仿真方法。建立考虑电磁刚度影响的传动系统扭转振动集中质量模型,研究模态特性,并试验验证模型的正确性;考虑齿间侧隙及半轴柔性,搭建传动系统集中-分布质量模型进行动态响应仿真及试验验证;建立、仿真控制电机模型及机电耦合模型,获得转矩波动影响下传动系统扭转振动时频响应。结果表明,所提机电耦合仿真方法能呈现较丰富的动力学现象,有助于进一步揭示电动车传动系统扭转振动特性。

Aiming at driveline torsional, vibration of an EV, an electromechanical coupling simulation method considering dynamic characteristics of EV＇s control motor and driveline clearance/flexibility was proposed. Firstly, the driveline lumped mass vibration model was established considering the influence of electromagnetic stiffness, its modal characteristics were studied and verified with tests. Then, the driveline lumped-distributed mass model was constructed considering backlash and flexibility of half shaft, the dynamic response simulation and test verification were conducted. Finally, the control motor model and the driveline electromechanical coupling model were built and simulated. The driveline torsion vibration response was obtained under the influence of torque ripple. Results showed that the proposed driveline electromechanical coupling simulation method can provide abundant dynamical phenomena, and its helpful to further reveal the driveline torsional vibration characteristics of an EV.