DocumentCode
1415402
Title
Reduction of cogging force in slotless linear permanent magnet motors
Author
Zhu, Z.Q. ; Xia, Z.P. ; Howe, D. ; Mellor, P.H.
Author_Institution
Dept. of Electron. & Electr. Eng., Sheffield Univ., UK
Volume
144
Issue
4
fYear
1997
fDate
7/1/1997 12:00:00 AM
Firstpage
277
Lastpage
282
Abstract
There are two potential causes of cogging force in linear permanent magnet motors, resulting from the slotting and the finite length of the iron-cored armature. The paper is concerned with slotless motors, for which a technique is described for minimising the cogging force which is produced when the armature has a mild steel sleeve (yoke). By analysing the cogging-force waveform developed at one end of the sleeve and optimising its axial length so that an opposing cogging-force waveform is developed at the other end, it is possible to obtain nearly zero resultant force. The technique has been validated on a prototype motor and found to be effective and simple to implement
Keywords
force; linear motors; machine testing; machine theory; permanent magnet motors; axial length; cogging force reduction; iron-cored armature; mild steel sleeve; slotless linear permanent magnet motors; yoke; zero resultant force;
fLanguage
English
Journal_Title
Electric Power Applications, IEE Proceedings -
Publisher
iet
ISSN
1350-2352
Type
jour
DOI
10.1049/ip-epa:19971057
Filename
612270
Link To Document