Design and finite element analysis of high speed motorized spindle system based on bearingless induction motor

In allusion to the characteristic of high speed motorized spindle, an innovation motorized spindle system based on 5-degree-of-freedom bearingless induction motor was put forward in the paper. The innovation suspension motor system consists of two independent suspension units: the 2-degree-of-freedom bearingless motor and the AC-DC-3-degree-of-freedom hybrid magnetic bearing. The prototype is designed and simulated to analyze the magnetic circuits by using finite element analysis software Asoft/Maxwell. The results indicate the validity of the design of high speed motorized spindle with bearingless induction motor, and some parameters have been optimized according to the simulation results.