ARCUATE MAGNET PIECE, PERMANENT MAGNET PIECE, PERMANENT MAGNET ASSEMBLY, PERMANENT-MAGNET APPLICATION DEVICE, AND MOTOR

Title:

ARCUATE MAGNET PIECE, PERMANENT MAGNET PIECE, PERMANENT MAGNET ASSEMBLY, PERMANENT-MAGNET APPLICATION DEVICE, AND MOTOR

Document Type and Number:

WIPO Patent Application WO/2015/147304

Kind Code:

A1

Abstract:

This arcuate magnet piece (1) is provided with: coupling side surfaces (6, 7) which are coupled with other adjacently joined arcuate magnet pieces (1A); a curved inner peripheral surface (3); and a curved outer peripheral surface (2) which faces the inner peripheral surface (3). The coupling side surfaces (6, 7) are provided with tip surfaces (6a, 7a) which intersect, at prescribed angles (θ1, θ2), tangents (T1, T2) to the direction of curvature of the outer peripheral surface (2). The coupling side surfaces (6, 7) are polarized such that, in cases when the gaps formed with the coupling side surfaces of the other arcuate magnet pieces (1A) are disposed so as to be substantially parallel, the magnetic poles of the other joined arcuate magnet pieces (1A) are different.

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Inventors:

SHIMBO NOBUYUKI (JP)
GOTOH MASASHI (JP)

Application Number:

PCT/JP2015/059787

Publication Date:

October 01, 2015

Filing Date:

March 27, 2015

Export Citation:

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Assignee:

TDK CORP (JP)

International Classes:

H02K1/27; H01F7/02

Domestic Patent References:

WO2003075292A1

2003-09-12

Foreign References:

JP2004259850A	2004-09-16
JPH01114354A	1989-05-08
JP2012228072A	2012-11-15
JP2010233346A	2010-10-14
JPS6341166U	1988-03-17

Other References: