Nonlinear Analysis of Rotor-AMB System with Current Saturation Effect

摘要

The analysis on nonlinear dynamics ofa rotor-AMB system is conducted in this paper. Thenonlinearity of electromagnetic force and currentsaturation effect are taken into account. The nonlinearmodel of the rotor-AMB system is built and the nonlineardynamic behaviors of the system in both resonance regionand non-resonance region are investigated throughnumerical integration method. This paper shows that therotor-AMB system can exhibit some complicated nonlineardynamic behaviors, such as soft spring characteristicof the amplitude-frequency response curve, the jumpphenomenon, and pitchfork bifurcation. And the effectsof exciting force and current saturation on these nonlineardynamic behaviors of the system are discussed.