Parameter design and finite element analysis for radial axial active magnetic bearing with sharing biased current

The configuration and working principle of a novel radial-axial active magnetic bearing with sharing biased magnetic current were introduced. The flux path was calculated by using the equivalent magnetic circuit, and the mathematical models of suspension forces were deduced. According to design desire of the suspension forces, the experiment prototype of the novel magnetic bearing was designed. The experiment prototype of the novel magnetic bearing's flux path is analyzed by finite element Ansoft software. The results of theory analysis and finite element analysis have shown that the mechanical configuration and magnetic circuits of the magnetic bearing are reasonable, and the suspension forces are satisfied design desire, and the movement and magnetic circuits among 3 degrees of freedom around the balanceable position have almost no coupling, and using independent PID(proportion integration differentiation) control among 3 degrees of freedom for this novel magnetic bearing and greatly simplifying the control system.