Analysis of Radial Magnetic Bearing Used in Magnetic Suspension Wind Power Generator

By replacing conventional mechanical bearing of wind power generator with magnetic bearing, the friction loss can be reduced obviously and the efficiency of power generation can be improved. Bearing capacity of radial magnetic bearing (RMB) is determined through analyzing the radial loads of wind power generator, and upon this, the structure of radial magnetic bearing is designed. Then the electromagnetic characteristics of radial magnetic bearing are simulated by using finite element method (FEM), the phenomenon of electromagnetic coupling and magnetic flux leakage is analyzed, and the comparison between ANSYS solution and analytical solution is done, through which, the variation of air-gap magnetic induction intensity and the electromagnetic force with control current is obtained, so the foundation data of control system is established.