Forces in screen-secondary linear reluctance motors

Author

Edwards, J.D. ; Preston, M.A.

Author_Institution

Sch. of Eng. & Appl. Sci., Sussex Univ., Brighton, UK

Volume

24

Issue

6

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

2913

Lastpage

2915

Abstract

In a screen-secondary linear reluctance motor (LRM), a nonmagnetic conducting barrier separates the primary from the secondary. A new model of segmental-secondary LRMs is presented in which the secondary induced magnetization is represented by a current sheet related to the d- and q-axis components of the air-gap flux density; this is equivalent to the earlier use of a scalar magnetic potential. Induced currents in the barrier are represented by a current sheer as in linear induction motors. Expressions are given for the air-gap flux density, the tractive force, and the normal force. Graphs are presented for the variation of force with velocity for an experimental LRM with a stainless-steel barrier

Keywords

linear motors; machine theory; reluctance motors; air-gap flux density; current sheet; d-axis components; graphs; induced currents in barrier; model; nonmagnetic conducting barrier; normal force; q-axis components; scalar magnetic potential; screen-secondary linear reluctance motors; secondary induced magnetization; stainless-steel barrier; tractive force; variation of force with velocity; Building materials; Conductivity; Induction motors; Iron alloys; Magnetic flux; Magnetic separation; Reluctance motors; Steel; Vehicle driving; Vehicle safety;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92286

Filename

92286