Patent ID: 6034456
Filing Date: 2000-03-07
Classification: F16C,H02K

Abstract:
A compact bearingless machine drive system comprising:first and second rotor segments coupled to a rotor shaft;a stator comprising a first stator segment, the first stator segment including a shared drive winding and a first separate control winding and a second stator segment including the shared drive winding and a second separate control winding;a common end ring coupled between the first and second rotor segments;a drive inverter for controlling the shared drive winding to generate torque to drive the bearingless machine;first and second control inverters for respectively controlling the first and second separate control windings to generate radial forces on the first and second rotor segments to control the radial position of the first and second rotor segments with respect to the stator;an axial bearing coupled to the rotor shaft; andan axial bearing inverter for controlling axial forces on the axial bearing.