Title :
A radial position control of induction type bearingless motor considering phase delay caused by the rotor squirrel cage
Author :
Nomura, S. ; Chiba, Akira ; Nakamura, F. ; Ikeda, K. ; Fukao, T. ; Rahman, M.A.
Author_Institution :
Dept. of Electr. Eng., Science Univ. of Tokyo, Chiba, Japan
Abstract :
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.<>
Keywords :
control system synthesis; equivalent circuits; frequency response; machine control; machine theory; poles and zeros; position control; rotors; squirrel cage motors; stators; bearingless motor; control system synthesis; equivalent circuit; frequency response; machine control; machine theory; phase delay; phase lead-lag compensator; poles; radial position control; rotor; squirrel cage motors; stator windings; Air gaps; Delay; Equivalent circuits; Frequency response; Induction motors; Magnetic levitation; Position control; Production; Rotors; Stator windings;
Conference_Titel :
Power Conversion Conference, 1993. Yokohama 1993., Conference Record of the
Conference_Location :
Yokohama, Japan
Print_ISBN :
0-7803-0471-3
DOI :
10.1109/PCCON.1993.264144
