Title :
Analysis and implementation of a tubular motor with Halbach magnet array
Author :
Kim, W.-J. ; Berhan, M.T. ; Trumper, D.L. ; Lang, J.H.
Author_Institution :
MIT, Cambridge, MA, USA
Abstract :
In the machine tool industry, direct-drive linear motor technology is of increasing interest as a means to achieve high acceleration, and to increase reliability. This paper discusses the analysis, design and operating characteristics of a novel ironless tubular linear motor that incorporates a magnet array with a magnetization pattern inspired by the Halbash array used in synchrotron light sources. The advantages of such a motor are that it is free of cogging, has efficient cooling, and has low inductance. The authors derive magnetic field solutions, force relations and commutation laws for the motor. Test results such as thrust measurements and step response are also given to confirm the analysis
Keywords :
design engineering; linear motors; machine testing; machine theory; magnetic fields; magnetisation; motor drives; permanent magnet motors; permanent magnets; stators; Halbach magnet array; acceleration; analysis; commutation laws; design; direct-drive linear motor; force relations; machine tool industry; magnetic field solutions; magnetization pattern; operating characteristics; reliability; step response; synchrotron light sources; thrust measurements; tubular motor; Acceleration; Induction motors; Light sources; Machine tools; Magnetic analysis; Magnetic field measurement; Magnetization; Optical arrays; Pattern analysis; Synchrotrons;
Conference_Titel :
Industry Applications Conference, 1996. Thirty-First IAS Annual Meeting, IAS '96., Conference Record of the 1996 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-3544-9
DOI :
10.1109/IAS.1996.557069
