Permanent-magnet machines with powdered iron cores and prepressed windings

Author

Jack, Alan G. ; Mecrow, Barrie C. ; Dickinson, Phillip G. ; Stephenson, Dawn ; Burdess, James S. ; Fawcett, Neville ; Evans, J.T.

Author_Institution

Newcastle upon Tyne Univ., UK

Volume

36

Issue

4

fYear

2000

Firstpage

1077

Lastpage

1084

Abstract

This paper presents a permanent-magnet servomotor, built with a powdered iron stator, which has been designed to take full advantage of the properties of the material. There are a number of important design features which are not possible with laminated cores. For example, the core back is axially extended over the end windings, the armature core components are subdivided and preformed stator coils are used. The coils are prepressed to form a solid component with an exceptionally high fill factor (78%). The prototype offers far superior performance to a conventionally laminated commercial machine, manufactured in the same frame

Keywords

permanent magnet machines; powder cores; rotors; servomotors; soft magnetic materials; stators; PM servomotor; armature core components; core back; design features; end windings; fill factor; performance improvement; permanent-magnet machines; powdered iron cores; powdered iron stator; preformed stator coils; prepressed windings; Iron; Machine windings; Magnetic cores; Magnetic flux; Magnetic materials; Manufacturing; Saturation magnetization; Servomotors; Soft magnetic materials; Stator cores;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/28.855963

Filename

855963