Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2001-02-06
2002-04-23
Ramirez, Nestor (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S179000, C310S201000, C310S208000
Reexamination Certificate
active
06376961
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a coil assembly of rotating electrical machinery such as a vehicle alternate current generator, etc., that is incorporated in a truck, etc., and a method for producing the same coil assembly, and a stator of rotating electric machinery using the same coil assembly,
2. Description of the Prior Art
In order to make the vehicle alternate current generator more compact and more powerful for its size, it is mandatory to improve the space factor inside each slot of the core of the stator winding, and to arrange more neatly and increase the density of the cross-over parts on the outside of the slots of the stator winding, i.e., the coil end parts. Numerous improvements have been proposed as exemplified by Japanese Patent No. 2927288 concerning this point.
FIGS. 27
(A) and (B) are perspective views of the essential parts of the stator winding of an automobile alternator of the prior art viewed from the front and rear sides respectively, and
FIG. 28
is a perspective view of the conductor segment used on the stator winding of the vehicle alternate current generator shown in FIG.
27
.
These drawings show a conductor segment
1
comprising an inner layer conductor part
1
a
, an outer layer conductor part
1
b
and a turning portion
1
c
, which is formed into a U-shape by bending a copper band-like member. Multiple conductor segments
1
formed as such are arranged on the rear side of a stator iron core
2
neatly aligning the turning portions
1
c
. Next, the turning portion
1
c
is bent in such a way that the inner layer conductor part
1
a
and the outer layer conductor part
1
b
will be separated circumferentially by a specified number of slots as shown in
FIG. 27
(B). Next, insert the outer layer conductor part
1
b
on the deeper side in the slot depth direction, and the inner layer conductor part
1
a
on the shallower side in the slot depth direction (not shown in the drawing), and join the end parts of the specified conductor segment
1
that are protruding on the front side by means of welding, brazing, and other similar methods as shown in
FIG. 27
(A), thereby forming a conjunction part
3
a
to constitute a coil member
3
.
The stator winding of the vehicle alternate current generator of the prior art were constituted by inserting a short U-shaped conductor segment
1
into the slots of the stator iron core
2
from the rear side and then joining the ends together that are protruding on the front side. Therefore, the work was inefficient and the productivity was low because it was necessary to insert numerous short conductor segments
1
into the slots of the stator iron core
2
and then join the ends one by one. Moreover, since the end portions have to be protruded further to allow the ends to be clamped by a fixture for the joining process, it was difficult to produce a smaller alternator.
SUMMARY OF THE INVENTION
The invention was developed to solve such problems and shortcomings as described above. It is therefore an object of the invention to provide a coil assembly for a rotating electrical machinery, for which mass production can be improved, and whose downsizing is enabled.
Also, it is another object of the invention to provide a method for producing a coil assembly for a rotating electrical machinery, by which improvements in the mass production and downsizing thereof are enabled.
In addition, it is yet another object of the invention to provide a stator for rotating electrical machinery, by which improvements in the mass production and downsizing thereof are enabled.
According to this invention, a coil assembly of rotating electrical machinery, which is mounted in a plurality of slots formed on the circumferential surface of an iron core at appointed pitches P, having a plurality of coil combinations, in which the respective coil combinations comprises a combination of a first coil member and a second coil member;
wherein each of said first coil member and second coil member includes:
a plurality of first linear portions disposed at pitches equal to “N” times (“N” is any natural number) said pitches P and respectively inserted in one of said plurality of slots;
a plurality of second linear portions disposed at pitches equal to “N” times said pitches P, positioned at the middle of said respective first linear portions and inserted into one of said plurality of slots;
a plurality of first turning portions for coupling said respective first linear portions with said respective second linear portions adjacent to one side of said respective first liner portions at one end side of said slots; and
a plurality of second turning portions for coupling said respective first linear portions with said respective second linear portions adjacent to other side of said respective first liner portions at the other end side of said slots;
wherein said respective first linear portions, first turning portions, second linear portions and second turning portions are formed so as to be continued to each other by one strip member; and
said first coil member and second coil member are combined so that in an appointed slot of said plurality of slots, the first linear portion of said first coil members is located at the inner layer side and the second linear portion of said second coil members is located at the outer layer side, and, in a slot separated by “N” slots from said appointed slot, the first linear portion of said second coil member is located at the inner layer side and the second linear portion of said first coil member is located at the outer layer side.
Therefore, the coil assembly of rotating electrical machinery, by which improvements in the mass production and downsizing thereof are enabled, can be provided.
Also, according to this invention, the coil assembly of rotating electrical machinery, wherein said first turning portions and said second turning portions, respectively, have an inclined portion extending said respective appointed slot to a turning point, and an inclined portion extending from said slot separated by “N” slots from said appointed slot to said turning point; and said turning point is displaced so as to be positioned nearer said slot separated by “N” slots from said appointed slot than said appointed slot.
Further, according to this invention, the coil assembly of rotating electrical machinery, wherein said first and second coil members are formed so that said respective first linear portions, first turning portions, second linear portions and second turning portions are continued by one strip member having an almost rectangular section.
Furthermore, according to this invention, the coil assembly of rotating electrical machinery, wherein said first and second coil members are formed so that said respective first linear portions, first turning portions, second linear portions and second turning portions are continued by one strip member having almost a circular section.
In addition, a coil assembly of rotating electrical machinery, according to this invention, which is mounted in a plurality of slots formed on the circumferential surface of an iron core at appointed pitches P, having a plurality of coil combinations, in which the respective coil combinations comprises a combination of a first coil member to a fourth coil member;
wherein each of said first coil member to said fourth coil member includes:
a plurality of first linear portions disposed at pitches equal to “N” times (“N” is any natural number) said pitches P and respectively inserted in one of said plurality of slots;
a plurality of second linear portions disposed at pitches equal to “N” times said pitches P, positioned at the middle of said respective first linear portions and inserted into one of said plurality of slots;
a plurality of first turning portions for coupling said respective first linear portions with said respective second linear portions adjacent to one side of said respective first liner portions at one end side of said slots; and
a plurality of second turning portions for coupling s
Adachi Katsumi
Asao Yoshihito
Matsui Hiroshi
Morishita Akira
Murakami Tsutomu
Lam Thanh
Mitsubshi Denki Kabushiki Kaisha
Ramirez Nestor
Sughrue & Mion, PLLC
LandOfFree
Coil assembly of rotating electrical machinery and method... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coil assembly of rotating electrical machinery and method..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coil assembly of rotating electrical machinery and method... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2905990