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Patent Searching and Data


Title:
EDDY CURRENT-TYPE SPEED-REDUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/146608
Kind Code:
A1
Abstract:
A speed-reduction device provided with: a braking member (1); first permanent magnets (3); second permanent magnets (4); and pole pieces (5). The first permanent magnets (3) are opposed to an inner peripheral surface or an outer peripheral surface of the braking member (1) with a gap therebetween, and are arrayed in a circumferential direction. Each of the first permanent magnets (3) includes a pair of magnetic poles arranged in a radial direction. The second permanent magnets (4) and the pole pieces (5) are disposed in the gap between the braking member (1) and the first permanent magnets (3), and are arrayed in the circumferential direction. Each of the second permanent magnets (4) includes a pair of magnetic poles arranged in the circumferential direction. The pole pieces (5) are arranged between second permanent magnets (4) that are adjacent to each other, and are in contact with the second permanent magnets (4). The arrangement of the magnetic poles of the first permanent magnets (3) is alternately inverted between first permanent magnets (3) that are adjacent to each other. The arrangement of the magnetic poles of the second permanent magnets (4) is alternately inverted between the second permanent magnets (4) that are adjacent to each other. The second permanent magnets (4) have a trapezoidal lateral cross section including an upper base and a lower base longer than the upper base.

Inventors:
IMANISHI KENJI (JP)
FUJITA TAKUYA (JP)
YAMAGUCHI HIROYUKI (JP)
NOGAMI HIROSHI (JP)
NOGUCHI YASUTAKA (JP)
MIYAHARA MITSUO (JP)
Application Number:
PCT/JP2019/001943
Publication Date:
August 01, 2019
Filing Date:
January 23, 2019
Export Citation:
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Assignee:
NIPPON STEEL CORP (JP)
International Classes:
H02K49/10; H02K49/02
Foreign References:
JP2007082333A2007-03-29
JP2005027396A2005-01-27
JP2004032927A2004-01-29
JP2007110804A2007-04-26
JP2557740Y21997-12-17
JP2004048963A2004-02-12
JP2004032927A2004-01-29
JP2007082333A2007-03-29
Other References:
See also references of EP 3748824A4
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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