ELECTRICAL MACHINES
ARMATURE DESIGN
Submitted by:
Gutierrez, Rojay Z.
Submitted to:
Engr. Lorenzo L. Moricho
ARMATURE DESIGN SPECIFICATIONS
Double Layer Triplex - Lap Winding (Progressive Winding)
Slots (S)
= 12 slots
Segments
= 24 segments
Plex (m)
= 3 (Triplex - Lap)
Poles(P)
= 2 Poles
Total no. Of Armature Conductors (Z)
= No. Of slot x No. of
conductors/slot=12x4=48
CALCULATIONS
Coil span:
𝑆
12
𝑃
2
𝑌𝑠 = ;
= 𝟔 slots per conductor
Commutator pitch:
Yc = ±m = ± 3
Pole pitch:
𝑍
48
𝑃
2
𝑌𝑝 = ;
= 𝟐𝟒 conductor per pole
Back pitch:
Front pitch:
𝑍
48
𝑃
2
.𝑌𝑏 = + 𝑚;
+ 3 = 𝟐𝟕
Average pitch:.
.𝑌𝑎𝑣 =
𝑌𝑏+𝑌𝑓
2
;
𝑍
48
𝑃
2
𝑌𝑓 = − 𝑚;
− 3 = 𝟐𝟏
Resultant pitch:
27+21
2
= 𝟐𝟒
Reentrancy
Yc = 3; Reentrancy = 3
𝑌𝑅 = 𝑌𝑏 − 𝑌𝑓 ; 27 − 21 = 𝟔
Parallel paths
a = m(P); 3(2) = 6
WINDING TABLE
Yc = 3
1
4
7
10
13
16
19
22
2
5
8
11
14
17
20
23
3
6
9
12
15
18
21
24
Yb = +27
1 to (1+27) = 28
7 to (7+27) = 34
13 to (13+27) = 40
19 to (19+27) = 46
25 to (25+27) = 52-48 = 4
31 to (31+27) = 58-48 = 10
37 to (37+27) = 64-48 = 16
43 to (43+27) = 70-48 = 22
3 to (3+27) = 30
9 to (9+27) = 36
15 to (15+27) = 42
21 to (21+27) = 48
27 to (27+27) = 54-48 = 6
33 to (33+27) = 60-48 = 12
39 to (39+27) = 66-48 = 18
45 to (45+27) = 72-48 = 24
5 to (5+27) = 32
11 to (11+27) = 38
17 to (17+27) = 44
23 to (23+27) = 50-48 = 2
29 to (29+27) = 56-48 = 8
35 to (35+27) = 62-48 = 14
41 to (41+27) = 68-48 = 20
47 to (47+27) = 74-48 = 26
Yf= -21
28 to (28-21) = 7
34 to (34-21) = 13
40 to (40-21) = 19
46 to (46-21) = 25
4 to (52-21) = 31
10 to (58-21) = 37
16 to (64-21) = 43
22 to (22-21) = 1
30 to (30-21) = 9
36 to (36-21) = 15
42 to (42-21) = 21
48 to (48-21) = 27
6 to (54-21) = 33
12 to (60-21) = 39
18 to (66-21) = 45
24 to ( 24-21) = 3
32 to (32-21) = 11
38 to (38-21) = 17
44 to (44-21) = 23
2 to (50-21) = 29
8 to (56-21) = 35
14 to (62-21) = 41
20 to (68-21) = 47
26 to (26-21) = 5