Analysis and Modeling of Rotor Slot Enclosure Effects in High-Speed Induction Motors

Author

Boglietti, Aldo ; Bojoi, Radu Iustin ; Cavagnino, Andrea ; Guglielmi, Paolo ; Miotto, Alessio

Author_Institution

Dept. of Electr. Eng., Politec. di Torino, Turin, Italy

Volume

48

Issue

4

fYear

2012

Firstpage

1279

Lastpage

1287

Abstract

In this paper, the effects due to the presence of closed or open rotor slots in high-speed induction motors are presented. In particular, the problem linked to electromagnetic effects on the motor current is analyzed in detail. Two 32 000-r/min induction motor prototypes, the former with open rotor slots and the latter with closed ones, have been built and tested in order to verify the theoretical analysis. A modified steady-state equivalent circuit to take into account the electromagnetic effects of rotor closed slots is proposed, and experimental tests have been performed to validate the proposed model. The presented study is focused on high-speed induction motors for turbomolecular vacuum pumps.

Keywords

equivalent circuits; high-speed techniques; induction motors; rotors; vacuum pumps; closed rotor slots; electromagnetic effects; high-speed induction motors; induction motor prototypes; modified steady-state equivalent circuit; motor current; open rotor slots; rotor slot enclosure effects; turbomolecular vacuum pumps; Bridge circuits; Equivalent circuits; Induction motors; Rotors; Saturation magnetization; Stators; Torque; High-speed applications; induction motor modeling; induction motors; molecular pump; rotor slot enclosure effects;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2012.2199270

Filename

6199974