Stability Analysis for EV Powertrain

Due to the influence of road excitation, damping and inertia resistance, the electric vehicle powertrain produces nonlinear torsional vibration, which leads to the instability of the powertrain. A nonlinear torsional vibration model considering the effect of rotor eccentricity is established. The equilibrium point of the undisturbed Hamiltonian system is solved. The effects of road excitation, damping and inertia resistance on the nonlinear vibration of the electric vehicle transmission system are studied. The way from periodic motion to chaotic motion is analyzed.