Abstract
This paper proposes new nonlinear control system to realize a zero power control of magnetic bearing system using only electromagnets. It is clarified through the simulation and experiment that the proposed nonlinear control this paper is a very useful approach to realize a zero power control of magnetic bearing system. Also, this proposed control strategy will be very powerful to stabilize for big deviations from the equilibrium point because of nonlinear control. The nonlinear control system is designed based on Lyapunov's direct method. The electromagnets is switched by the nonlinear algorithm depend on the displacement and the velocity of a rotor. It is very easy to design the nonlinear control system because it consists of only two parameters. Also, the characteristics of closed loop can be changed easily.
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