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

Abstract

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.