Machine with magnetic-borne rotor and electrical radial field motor-generator

A rotating machine assembly comprising a casing, a rotor in said casing, a radial field motor-generator and an axial field motor-generator, said axial field motor-generator including a stationary armature winding and means for generating an axial magnetic field and being operative for absorbing axial bearing forces acting on said rotor, said radial field motor-generator including a stationary armature winding and means for generating a radial magnetic field and being operative for absorbing radial forces acting on said rotor, said means for generating a radial magnetic field and said means for generating an axial magnetic field being mounted on said rotor, the magnetic field of said axial field motor-generator having a greater effective diameter than the magnetic field of said radial field motor-generator, the stationary armature windings of said radial field motor-generator and said axial field motor-generator each being subdivided into four winding quadrants, each winding quadrant having a separate regulating unit for regulating the current thereof, said axial field motor generator including means for controlling the regulating units thereof to control the movement of said rotor in two directions of rotation and in a first direction of spacial freedom, said radial field motor-generator including means for controlling the regulating units thereof to control the movement of said rotor in second and third directions of spacial freedom, said axial field motor-generator further including four gap sensors, each of said gap sensors being operative for sensing the gap between said axial field magnetic field generating means and a different quadrant of the stationary armature winding of said axial field motor generator, said means for controlling the regulating units of said axial field motor-generator being responsive to said gap sensors for controlling the regulating units of said axial field motor-generator to individually shift the current distribution in the phases of the different quadrants of said axial field motor-generator in order to control the movement of said rotor in said first direction of spacial freedom and in said two directions of rotation.