WE CLAIM:
1. A rotary electric machine armature core comprising a core segment linked body (15)
that is configured by linking a plurality of core segments (16) that each have a T shape that
comprises a back yoke portion (16a) and a magnetic pole tooth (16b) that protrudes from a
central portion of said back yoke portion (16a),
characterized in that:
a shaft portion (19) is formed on a first longitudinal end portion of said back yoke portion (16a), and an interfitting aperture (20) is formed on a second end portion of said back yoke portion (16a);
said magnetic pole tooth (16b) comprises:
a tooth main portion (16b1) that protrudes outward from said back yoke portion (16a);
a width reduced portion (16b2) that is formed on said tooth main portion (16b1) near said back yoke portion (16a), said width reduced portion (16b2) having a width dimension that is narrower than a width dimension of said tooth main portion (16b1); and
a width expanded portion (16b3) that is formed on a protruding end of said
tooth main portion (16b1), said width expanded portion (16b3) having a width
dimension that is wider than a width dimension of said tooth main portion
(16b1);
said plurality of core segments (16) are configured so as to be linked pivotably around
said shaft portion (19) by fitting said shaft portion (19) of one of said core segments (16) into
said interfitting aperture (20) of an adjacent core segment (16), so as to adopt a state that is
opened out rectilinearly such that directions of protrusion of said magnetic pole teeth (16b)
from said back yoke portions (16a) are parallel to each other and a state that is pivoted
around said shaft portion (19) so as to be bent into an arc shape; and
said core segment linked body (15) when opened out rectilinearly is configured so as to satisfy (te - tn)/τs' > 0, and 0 < (te - tn)/te ≤ 0.27, where τs' is said distance between said center lines (A) of said adjacent magnetic pole teeth (16b), te is a width dimension of said tooth main portions (16b1), and tn is said width dimension of said width reduced portions (16b2).
2. A rotary electric machine armature core comprising a core segment linked body (15)
that is configured by linking a plurality of core segments (16) that each have a T shape that
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comprises a back yoke portion (16a) and a magnetic pole tooth (16b) that protrudes from a central portion of said back yoke portion (16a), characterized in that:
a shaft portion (19) is formed on a first longitudinal end portion of said back yoke portion (16a), and an interfitting aperture (20) is formed on a second end portion of said back yoke portion (16a);
said magnetic pole tooth (16b) comprises:
a tooth main portion (16b1) that protrudes outward from said back yoke portion (16a);
a width reduced portion (16b2) that is formed on said tooth main portion (16b1) near said back yoke portion (16a), said width reduced portion (16b2) having a width dimension that is narrower than a width dimension of said tooth main portion (16b1); and
a width expanded portion (16b3) that is formed on a protruding end of said
tooth main portion (16b1), said width expanded portion (16b3) having a width
dimension that is wider than a width dimension of said tooth main portion
(16b1);
said plurality of core segments (16) are configured so as to be linked pivotably around
said shaft portion (19) by fitting said shaft portion (19) of one of said core segments (16) into
said interfitting aperture (20) of an adjacent core segment (16), so as to adopt a state that is
opened out rectilinearly such that directions of protrusion of said magnetic pole teeth (16b)
from said back yoke portions (16a) are parallel to each other and a state that is pivoted
around said shaft portion (19) so as to be bent into an arc shape;
said core segment linked body (15) is configured so as to be displaceable in said state that is opened out rectilinearly between an expanded position in which a distance between center lines (A) of said magnetic pole teeth (16b) of adjacent core segments (16) is expanded and a contracted position in which said distance is contracted; and
said core segment linked body (15) when opened out rectilinearly is configured: such that a distance between adjacent width reduced portions (16b2) is greater than a width dimension of said width expanded portions (16b3) when said adjacent core segments (16) are in said expanded position, and said distance between said adjacent width reduced portions (16b2) is less than said width dimension of said width expanded portions (16b3) when said adjacent core segments (16) are in said contracted position; and
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so as to satisfy (te - tn)/τs' > 0, and 0 < (te - tn)/te ≤ 0.27, where τs' is said distance between said center lines (A) of said adjacent magnetic pole teeth (16b) in said expanded position, te is a width dimension of said tooth main portions (16b1), and tn is said width dimension of said width reduced portions (16b2).
3. The rotary electric machine armature core as claimed in Claim 1 or 2, wherein said core segment linked body (15) is configured so as to satisfy (te - tn)/τs' ≥ 0.07.
4. The rotary electric machine armature core as claimed in Claim 1 or 2, wherein said core segment linked body (15) is configured so as to satisfy (te - tn)/τs' ≥ 0.042.
5. The rotary electric machine armature core as claimed in Claim 1 or 2, wherein said core segment linked body (15) is configured so as to satisfy 0 < bg/τs' ≤ 0.143, where bg is a distance between adjacent width expanded portions (16b3) when said core segment linked body (15) is linked into an annular shape.
6. The rotary electric machine armature core as claimed in Claim 1 or 2, wherein said core segment linked body (16) is configured so as to satisfy 0.019 ≤ tt/τs' ≤ 0.057 and 0.08 ≤ tnr/τs' ≤ 0.24, where tt is a radial dimension of two circumferential end portions of said width expanded portion (16b3), and tnr is a radial dimension of said width reduced portion (16b2).
7. The rotary electric machine armature core as claimed in Claim 1 or 2, wherein said core segment linked body (15) is configured so as to satisfy 0.019 ≤ tt/τs' ≤ 0.048 and 0.08 ≤ tnr/τs' ≤ 0.2, where tt is a radial dimension of two circumferential end portions of said width expanded portion (16b3(, and tnr is a radial dimension of said width reduced portion (16b2).
8. The rotary electric machine armature core as claimed in any one of Claims 1 through 7, wherein:
said width reduced portion (16b2) is formed by notching two sides in a width direction of said magnetic pole tooth (16b); and
a cross-sectional shape of notch portions (22) that are formed on said two sides in said width direction of said magnetic pole tooth (16b) that is perpendicular to a plane that includes a center line (A) of said magnetic pole tooth (16b) is formed into a cross-sectional shape that comprises:
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a base side that is parallel to said center line (A) of said magnetic pole tooth (16b);
an upper side that is positioned near said back yoke portion (16a), said upper side being perpendicular to said center line (A) of said magnetic pole tooth (16b); and
a lower side that is positioned near said width expanded portion (16b3), said upper side displacing toward said width expanded portion (16b3) away from said center line of said magnetic pole tooth (16b).
9. The rotary electric machine armature core as claimed in any one of Claims 1 through
8, wherein an inner circumferential surface of said width expanded portion (16b3) is
constituted by:
a circular arc-shaped surface that is centered around a central axis when said core segment linked body (15) is linked into an annular shape; and
flat surfaces that are perpendicular to a center line (A) of said magnetic pole tooth (16b), said flat surfaces being formed on two sides of said circular arc-shaped surface in a width direction.
10. A rotary electric machine comprising:
an armature (10) that comprises:
said armature core (12)as claimed in any one of Claims 1 through 9; and an armature coil (13) that is mounted to said magnetic pole teeth (16b); and a rotor (2) that is disposed so as to be coaxial to said armature (10) so as to be rotatable around an axis.
Dated this 28 day of September 2016
Digitally Signed
(S. Herald Daniel)
REG. No: IN/PA-2303
of De Penning & De Penning
Agent for the Applicants
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