Modeling and dynamic stabilization for suspension system using tuned LC circuit

The authors develop a transfer function model of magnetic suspension systems using a tuned LC circuit by linearizing system equations near the equilibrium state. This model not only explains nicely the inherent dynamic instability but also gives the necessary condition of stability. The authors also present a novel dynamic stabilization method for magnetic suspension systems using a tuned LC circuit. In order to achieve stable suspension without any mechanical contact, damping is applied to the moveable stator rather than to the suspended object directly. Simulations are carried out to confirm the theoretical analysis