Nonlinear forced vibration of electromechanical integrated magnetic gear system

A novel magnetic gear drive, the electromechanical integrated magnetic gear (EIMG) is proposed, in which field modulated magnetic gear, drive and control are integrated. EIMG can offer the larger torque at a lower speed. Considering the obvious nonlinear characteristics of the electromagnetic coupling forces among components, the nonlinear differential equations with quadratic terms are founded. Forced responses of the nonlinear EIMG system are calculated and discussed when the exciting frequency is closed to the torsional modal combination frequency between the inner rotor and the outer ferromagnetic pole-pieces. The results show that the strong and continuous resonance doesn´t occur, but the strong transient vibration will occur and the amplitudes of components will decrease very slowly. These will deteriorate the dynamic behaviors of EIMG system.