A radial position control of induction type bearingless motor considering phase delay caused by the rotor squirrel cage

A squirrel cage induction type bearingless motor which has conventional four-pole stator windings and additional two-pole stator windings for the radial position control of the rotor has been proposed. The squirrel cage rotor windings can be seen as not only four-pole windings but also as two-pole w...

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Bibliographic Details
Main Authors: Nomura, S., Chiba, A., Nakamura, F., Ikeda, K., Fukao, T., Rahman, M.A.
Format: Conference Proceeding
Language:English
Subjects:
Air gaps
Delay
Equivalent circuits
Frequency response
Induction motors
Magnetic levitation
Position control
Production
Rotors
Stator windings
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Summary:A squirrel cage induction type bearingless motor which has conventional four-pole stator windings and additional two-pole stator windings for the radial position control of the rotor has been proposed. The squirrel cage rotor windings can be seen as not only four-pole windings but also as two-pole windings. An equivalent circuit for one phase at the two-pole winding terminals is shown. The frequency response characteristics of effective current components in the radial force production are calculated. A phase lead-lag compensator is designed, and its effectiveness was shown.< >
DOI:10.1109/PCCON.1993.264144