Investigation of current flow in the bars of radially-ducted cage rotors using a three-dimensional finite-element eddy current formulation

Author

Flack, T.J. ; Williamson, S.

Author_Institution

Dept. of Eng., Cambridge Univ., UK

Volume

28

Issue

2

fYear

1992

fDate

3/1/1992 12:00:00 AM

Firstpage

1378

Lastpage

1381

Abstract

The authors describe the application of a three-dimensional eddy current formulation to the problem of the calculation of the current density distribution in the bars of cage rotor induction machines with radially ducted rotors under steady-state conditions. The most suitable choice of formulation and its application to the ducted rotor problem are considered, and the rotor model and boundary conditions are described. Results are given in terms of the variation of the current density distribution and power loss along the bar, illustrating the effect of the ducts on the bar resistance

Keywords

eddy currents; finite element analysis; rotors; squirrel cage motors; bar resistance; bars of radially-ducted cage rotors; boundary conditions; current density distribution; current flow; ducted rotor problem; induction machines; power loss; rotor model; steady-state conditions; three-dimensional finite-element eddy current formulation; Bars; Conductivity; Cooling; Copper; Current density; Ducts; Eddy currents; Finite element methods; Induction motors; Rotors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.123949

Filename

123949