DocumentCode
1113597
Title
Linear ball-bearing motor
Author
Watson, D.B. ; Watson, A.M.
Author_Institution
Dept. of Electr. & Electron. Eng., Canterbury Univ., Christchurch, New Zealand
Volume
141
Issue
3
fYear
1994
fDate
5/1/1994 12:00:00 AM
Firstpage
224
Lastpage
228
Abstract
The acceleration of a steel ball running on parallel steel rails has been measured. When the rails are connected, respectively, to the positive and negative terminals of a DC supply, the ball completing and electrical circuit, the acceleration increases as the current is raised. Three components of acceleration have been recognised: a frictional retardation; an electromagnetic acceleration which increases with current but is independent of speed; and an electromagnetic retardation which increases with both current and speed. The characteristics of this linear ball-bearing motor are compared with those of the cylindrical ball-bearing motor, and with the predictions of electromagnetic theories
Keywords
acceleration measurement; electric motors; electromagnetic field theory; friction; machine bearings; machine theory; small electric machines; EM theory; acceleration measurement; cylindrical ball-bearing motor; electromagnetic acceleration; electromagnetic retardation; frictional retardation; linear ball-bearing motor; parallel steel rails; predictions; steel ball;
fLanguage
English
Journal_Title
Science, Measurement and Technology, IEE Proceedings -
Publisher
iet
ISSN
1350-2344
Type
jour
DOI
10.1049/ip-smt:19949919
Filename
295444
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