US2004250409A1PendingUtilityA1
Method for making an electric motor stator
Priority: Sep 28, 2001Filed: Jul 9, 2004Published: Dec 16, 2004
Est. expirySep 28, 2021(expired)· nominal 20-yr term from priority
Inventors:C. W. Luttrell
Y10T29/4902H02K 15/065Y10T29/49073Y10T29/49133Y10T29/53143Y10T29/49009Y10T29/49002H02K 3/28Y10T29/49071
36
PatentIndex Score
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Cited by
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Claims
Abstract
A technique for making a stator for an electric motor or similar machine includes disposing a plurality of concentric coils in a stator core such that leads exit both ends of the stator core. The coils are disposed in accordance with a winding pattern that is particularly suited for making four-pole, three-phase machines. Certain of the coils are disposed singularly within core slots, while other coils share slots with coils of other winding groups. The coils may be inserted by machine, and in several layers by rotating the stator core between each layer insertion.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A method for making a stator, the method comprising:
installing first and third sets of concentric coil groups in a stator core, whereby leads of the first and third sets of concentric coils exit the first end of the stator core; and installing a second and fourth sets of concentric coil groups in the stator core, whereby leads of the second and fourth sets of concentric coils exit the second end of the stator core.
2 . The method of claim 1 , wherein the first and third sets of concentric coil groups are installed through the first end, and the second and fourth sets of concentric coil groups are installed through the second end.
3 . The method of claim 2 , wherein the stator core is rotated between the installation of the first and third coil group sets and installation of the second and fourth coil group sets.
4 . The method of claim 3 , wherein the stator core is rotated between installation of the first and second coil group sets, between installation of the second and third coil group sets, and between installation of the third and fourth coil group sets.
5 . The method of claim 2 , wherein at least one coil of the second and fourth coil group sets is installed over a coil of the first and third coil group sets in respective slots of the stator core.
6 . The method of claim 5 , wherein at least one coil of each coil group set is installed singularly within a respective slot of the stator core.
7 . The method of claim 2 , wherein the coil groups define a four-pole, three-phase stator.
8 . The method of claim 2 , wherein the coil groups are disposed in an order of A1, B4, C2, A3, B1, C4, A2, B3, C1, A4, B2, and C3, where A, B and C represent alternating current phases, and 1, 2, 3 and 4 represent coil groups of the first, second, third and fourth sets, respectively.
9 . The method of claim 2 , wherein the stator core includes 72 slots and each coil group includes 4 coils.
10 . The method of claim 2 , wherein the coil groups are installed in accordance with the following distribution:
Slot
Winding(s)
1
A1a
2
A1b
3
A1c/B2d
4
A1d/B2c
5
B2b
6
B2a
7
B4a
8
B4b
9
C3d/B4c
10
C3c/B4d
11
C3b
12
C3a
13
C2a
14
C2b
15
A1d/C2c
16
A1c/C2d
17
A1b
18
A1a
19
A3a
20
A3b
21
A3c/B4d
22
A3d/B4c
23
B4b
24
B4a
25
B1a
26
B1b
27
B1c/C2d
28
B1d/C2c
29
C2b
30
C2a
31
C4a
32
C4b
33
A3d/C4c
34
A3d/C4d
35
A3b
36
A3a
37
A2a
38
A2b
39
B1d/A2c
40
B1c/A2d
41
B1b
42
B1a
43
B3a
44
B3b
45
B3c/C4d
46
B3d/C4c
47
C4b
48
C4a
49
C1a
50
C1b
51
C1c/A2d
52
C1d/A2c
53
A2b
54
A2a
55
A4a
56
A4b
57
B3d/A4c
58
B3c/A4d
59
B3b
60
B3a
61
B2a
62
B2b
63
C1d/B2c
64
C1c/B2d
65
C1b
66
C1a
67
C3a
68
C3b
69
C3c/A4d
70
C3d/A4c
71
A4b
72
A4a
wherein upper case letters A, B, and C indicate respective phases, digits 1, 2, 3, and 4 represent coil groups, and lower case letters a, b, c, and d represent individual coils of each coil group.
11 . A method for making a stator, the method comprising:
installing a plurality of concentric coil groups in slots of a stator core such that the coil groups are disposed in an order of A1, B4, C2, A3, B1, C4, A2, B3, C1, A4, B2, and C3, where A, B and C represent alternating current phases, and 1, 2, 3 and 4 represent coil groups of the first, second, third and fourth sets, respectively, and wherein groups A1, B4, C2, A2, B3 and C1 are installed through a first end of the stator core whereby coil leads of each group exit the stator core through the first end, and groups A3, B1, C4, A4, B2 and C3 are installed through a second end of the stator core whereby coil leads of each group exit the stator core through the second end.
12 . The method of claim 11 , wherein at least one coil of a coil group set is disposed singularly within a respective slot of the stator core.
13 . The method of claim 11 , wherein the stator core is rotated between installation of the first and second coil group sets.
14 . The method of claim 13 , wherein the stator core is related between installation of the second and third coil group sets
15 . The method of claim 14 , wherein the stator core is rotated between installation of the third and fourth coil group sets.
16 . The method of claim 11 , wherein at least one coil of coil groups A1 and C2 are disposed in the same slot, C2 and B1 are disposed in the same slots B1 and A2 are disposed in the same slot, A2 and C1 are disposed in the same slot, C1 and B2 are disposed in the same slot, and B2 and A1 are disposed in the same slot.
17 . The method of claim 11 , wherein the stator core includes 72 slots and each coil group includes 4 coils.
18 . A method for making a stator, the stator having a plurality of slots, the comprising installing the coil groups in accordance with the following distribution:
Slot
Winding(s)
1
A1a
2
A1b
3
A1c/B2d
4
A1d/B2c
5
B2b
6
B2a
7
B4a
8
B4b
9
C3d/B4c
10
C3c/B4d
11
C3b
12
C3a
13
C2a
14
C2b
15
A1d/C2c
16
A1c/C2d
17
A1b
18
A1a
19
A3a
20
A3b
21
A3c/B4d
22
A3d/B4c
23
B4b
24
B4a
25
B1a
26
B1b
27
B1c/C2d
28
B1d/C2c
29
C2b
30
C2a
31
C4a
32
C4b
33
A3d/C4c
34
A3d/C4d
35
A3b
36
A3a
37
A2a
38
A2b
39
B1d/A2c
40
B1c/A2d
41
B1b
42
B1a
43
B3a
44
B3b
45
B3c/C4d
46
B3d/C4c
47
C4b
48
C4a
49
C1a
50
C1b
51
C1c/A2d
52
C1d/A2c
53
A2b
54
A2a
55
A4a
56
A4b
57
B3d/A4c
58
B3c/A4d
59
B3b
60
B3a
61
B2a
62
B2b
63
C1d/B2c
64
C1c/B2d
65
C1b
66
C1a
67
C3a
68
C3b
69
C3c/A4d
70
C3d/A4c
71
A4b
72
A4a
wherein upper case letters A, B, and C indicate respective phases, digits 1, 2, 3, and 4 represent coil groups, and lower case letters a, b, c, and d represent individual coils of each coil up.
19 . The method of claim 18 , wherein leads of a first pair of concentric coil groups exit a first end of the stator core and leads of a second pair of concentric coil groups exit a second end of the stator core.
20 . The method of claim 18 , wherein a first pair of concentric coil groups are installed through a first end of the stator core and a second pair of concentric coil groups are installed through a second end of the stator core.Join the waitlist — get patent alerts
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