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Title:
MAGNETIC GEAR ARRANGEMENT
Document Type and Number:
WIPO Patent Application WO/2010/075907
Kind Code:
A3
Abstract:
A magnetic gear arrangement comprises: (i) a first gear member for generating a first magnetic field, (ii) a second gear member for generating a second magnetic field, and (iii) a coupling device which provides arrangements of interpoles between the first gear member and the second gear member. The interpoles couple the first and second magnetic fields such that different arrangements of interpoles produce different gear ratios between the first and second gear members. The coupling device comprises a plurality of ferromagnetic pole elements which at leastly partly form the interpoles. Each pole element has a Curie temperature whereby the pole element is active below its Curie temperature and inactive above its Curie temperature. The magnetic gear arrangement further comprises a temperature controller for controlling the temperature of at least some of the pole elements such that, under the control of the temperature controller, the temperatures of pole elements can cross their respective Curie temperatures and thereby change from active to inactive or the reverse.

Inventors:
EDWARDS HUW LLEWELYN (GB)
Application Number:
PCT/EP2009/007980
Publication Date:
December 02, 2010
Filing Date:
November 09, 2009
Export Citation:
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Assignee:
ROLLS ROYCE PLC (GB)
EDWARDS HUW LLEWELYN (GB)
International Classes:
H02K49/10; H02K1/02
Domestic Patent References:
WO2007107691A12007-09-27
Foreign References:
DE4405701A11995-08-24
JPS58186382A1983-10-31
Other References:
CHAU K ET AL: "Transient analysis of coaxial magnetic gears using finite element comodeling", JOURNAL OF APPLIED PHYSICS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US LNKD- DOI:10.1063/1.2831491, vol. 103, no. 7, 17 January 2008 (2008-01-17), pages 7F101 - 7F101, XP012110356, ISSN: 0021-8979
Attorney, Agent or Firm:
BARCOCK, Ruth, Anita (P.O. Box 31Derby, DE24 8BJ, GB)
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