Title:
LINEAR BRUSHLESS DC MOTOR WITH IRONLESS ARMATURE ASSEMBLY
Document Type and Number:
WIPO Patent Application WO2002056447
Kind Code:
A3
Abstract:
A linear motion device is disclosed which includes an armature assembly, and a field assembly which includes a plurality of permanent magnets each having a length, and a plurality of permanent magnets and the length of the plurality of pole pieces is tailored to achieve a constant force versus stroke characteristic, when sinusoidal commutation is used.
Inventors:
GODKIN MIKHAIL
Application Number:
PCT/US2001/050594
Publication Date:
March 06, 2003
Filing Date:
December 21, 2001
Export Citation:
Assignee:
BEI TECHNOLOGIES INC (US)
International Classes:
H02K41/035; H01F7/06; H02K41/03; (IPC1-7): H02K41/035; H02K29/03
Domestic Patent References:
| WO2001039588A1 | 2001-06-07 |
Foreign References:
| EP0580117A2 | 1994-01-26 | |||
| US5840134A | 1998-11-24 | |||
| EP0949748A1 | 1999-10-13 | |||
| US5896076A | 1999-04-20 |
Other References:
"VOICE COIL MOTOR WITH LINEARIZED FORCE CONSTANT", RESEARCH DISCLOSURE, KENNETH MASON PUBLICATIONS, HAMPSHIRE, GB, no. 301, 1 May 1989 (1989-05-01), pages 347, XP000052516, ISSN: 0374-4353
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