CHAIN WINDING• In all aspects, this winding is similar to that of

mush winding except that both coil sides of a coil have equal length and diamond shape.

1

2

7

6

5

4

3

Example # 3 : on Chain WindingGiven data

S=12; p=2;m=3; a=1; type=chain• Solution

a) The number of coil groups, K

b) The number of slots per pole per phase, q

c) Coil pitch

This is an even number and hence winding is not possible with an even coil span . There fore , it is shortened by one slot and a coil span of 5 slots is used.d) The electrical angle,

e) The angle between adjacent slots,

f) The distance between the beginning of each phase,

32

23

23K P i.e. there is one coil group per phase

223

12

pm

Sq

i.e. there are two coils in a group

62

12

p

SYS Full-Pitch

3602180180 P

3012

360

S

slots430

120120

g) If the beginning of Phase A is slot 1, then the beginning of phase B =1+=5 and the beginning of phase C =1+2=1+8=9

B

B’

A’

A

C

C’600

Phase sequencePhase sequence

1 2 3 4 5 6 7 8 9 10 11 12

A A C’ C’ B B A’ A’ C C B’ B’

Connection diagrams

A

A’

Phase A

2 7 R

1 8 L

+5

+5

B

B’

Phase B

6 11 R

5 12 L

C’

C

Phase C

10 3 R

9 4 L

1

2 8

7

6

5

4

3 9

10

11

12

5

12

10

8

8

10

12

3

51

1

A B’A’C’ CB

3