Title :
An analysis of bearingless AC motors
Author :
Chiba, A. ; Deido, T. ; Fukao, T. ; Rahman, M.A.
Author_Institution :
Dept. of Electr. Eng., Tokyo Sci. Univ., Chiba, Japan
fDate :
3/1/1994 12:00:00 AM
Abstract :
Several types of AC bearingless motors are proposed. These bearingless motors have conventional four-pole stator windings and additional two-pole windings, whose currents produce radial forces acting on the rotor. General expressions of the machine inductances and radial forces are derived for the cylindrical rotor and salient-pole motors. No-load characteristics of laboratory squirrel-cage induction and reluctance-type synchronous bearingless motors are provided. The test motors were successfully driven by the control circuits
Keywords :
inductance; machine theory; reluctance motors; squirrel cage motors; stators; bearingless AC motors; control circuits; four-pole stator windings; machine inductances; no-load characteristics; radial forces; reluctance-type synchronous motors; rotor; salient-pole motors; squirrel-cage induction motors; test motors; two-pole windings; AC motors; DC machines; Induction motors; Machine tools; Magnetic levitation; Reluctance motors; Rotors; Shafts; Stator windings; Synchronous motors;
Journal_Title :
Energy Conversion, IEEE Transactions on
