Development of Small Wind Generator Based on Hybrid Magnetic Bearing

In the world, there exists a lot of wind energy, so through wind generator the energy crisis can be partly solved. In the traditional wind generator, the mechanical frictional resistance is too big, as the wind speed in the city is not so high, usually it can't start up when the wind speed is not big enough. Hybrid magnetic bearing has the features of no mechanical contact, no friction etc. minimizing the damping in the small wind generator based on hybrid magnetic bearing (HMB), which enables the wind generator start up with low speed wind and work with breeze. This paper introduces structure and principle of the proposed hybrid magnetic bearing of small wind genrator. The geometric parameters are optimized using FEM analysis. The system dynamic analysis is performed. The modeling and implementation of an axial position controller is presented, the simulation results show stable levitation and good levitated rotation.