Powertrain torsional vibration of a central-driven pure EV

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.