A new viewpoint of end effect of linear induction motor from secondary side in ladder type model

Author

Fujii, N. ; Harada, T.

Author_Institution

Dept. of Electr. & Electron. Syst. Eng., Kyushu Univ., Fukuoka, Japan

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

4040

Lastpage

4042

Abstract

As a new viewpoint, the physical phenomenon of end effect in a ladder type linear induction motor (LIM) is observed from the secondary side by making use of the structural feature. The phenomena in the ladder type and the sheet type LIM are the same fundamentally. The analytical method for the study is the special two-dimensional electromagnetic analysis, in which the current in each conducting bar is determined considering the time harmonics of the secondary current. A new factor tp/ts is proposed to present the degree of end effect, in which tp is the passing duration of the primary core at a secondary point and ts the half-period of the slip frequency

Keywords

electric current; harmonics; linear induction motors; machine theory; magnetic flux; magnetic levitation; transportation; 2D electromagnetic analysis; conducting bar current; end effect; flux density; ladder type model; linear induction motor; secondary current; slip frequency; time harmonics; Costs; Energy consumption; Fourier series; Frequency; Harmonic analysis; Induction motors; Power generation economics; Power system economics; Rail transportation; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800748

Filename

800748