Active vibration suppression of electric vehicle drive systems based on flux-linkage-current inverse mapping

Electric drive systems (EDSs) often exhibit complex coupled vibrations caused by interactions between electromagnetic nonlinearities and mechanical excitations. To characterize these interactions and develop an effective vibration-suppression method, this study establishes a multi-physics coupled model of an EDS that accounts for temperature-dependent electromagnetic parameters, magnetic-field harmonics, and time-varying mesh stiffness. The model accuracy is verified using test-bench measurements. Based on this, the coupled vibration behavior of the EDS is analyzed, and an active control method based on flux-linkage-current inverse mapping is proposed. The results show that nonlinear mechanical excitations generate sideband current components associated with the gear-meshing frequency, whereas electromagnetic harmonics intensify dynamic fluctuations in the gear drivetrain, indicating evident cross-domain coupling in the EDS. The vector-control system compensates for the temperature-induced decrease in magnetic flux density by increasing the fundamental component of the stator current. After harmonic-current injection, the maximum fluctuation amplitude of the electromagnetic torque is reduced by 43.89%, and the amplitudes of the 6 f e and 12 f e torque harmonics decrease by 46.17% and 80.38%, respectively. The proposed strategy also attenuates the corresponding harmonic components in the gear system under steady-state operating conditions.