Analysis and Effects of Inter-Bar Current and Skew on a Long Skewed-Rotor Induction Motor for Pump Applications

Author

Dorrell, David G. ; Holik, Piotr J. ; Rasmussen, Claus B.

Author_Institution

Dept. of Electron. & Electr. Eng., Glasgow Univ.

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2534

Lastpage

2536

Abstract

This paper describes an investigation into the reasons for the reduction in starting torque of a very long skewed-rotor induction machine. It was previously assumed that inter-bar currents were the reason for the torque reduction and this is investigated by variation of the inter-bar resistance and also inclusion of inter-bar inductance. However, the fabrication process meant that the inter-bar resistance is high, and the simulation results for this machine illustrate that it is not true in this instance. It is found that several skew effects account for the reduction in torque and this is investigated in a variety of ways. In addition, the fitting of a large-diameter shaft is investigated

Keywords

induction motors; pumps; shafts; torque; fabrication process; interbar current; interbar inductance; interbar resistance; pump applications; skew effects; skewed-rotor induction motor; starting torque reduction; Circuit simulation; Finite element methods; Inductance; Induction machines; Induction motors; Manufacturing; Measurement standards; Rotors; Shafts; Torque measurement; Induction motors; inter-bar current; torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.892537

Filename

4202701